Mozart and Bruckner at the National Concert Hall

Posted in Biographical, Music with tags , , , , , , , on December 6, 2025 by telescoper

I was worried I might have to miss last night’s concert by National Symphony Orchestra Ireland conducted by Anja Bihlmaier at the National Concert Hall. I bought the ticket some weeks ago and was looking forward to it, but I had been a bit unwell earlier in the week and didn’t want to go only to cough all the way through, possibly infecting others on the way. By Friday afternoon, however, I felt a lot better and took the decision to go for it. I’m very glad I did because I enjoyed the music enormously and didn’t cough or sneeze once!

There were only two items on the menu, another pairing of Mozart and Bruckner.

In the first half we heard the Piano Concerto No. 15 by Wolfgang Amadeus Mozart played by Boris Giltberg. This piece was written in 1784 when the composer had reached the ripe old age of 28. It’s an enjoyable and entertaining piece, not perhaps as profound as some of the later piano concertos (Mozart wrote 27 altogether), but well worth listening to. It’s also regarded as one of the most difficult to play, though Boris Giltberg made it look easy enough and was clearly enjoying himself while he played it as I’m sure did the composer when he performed it for the first time in Vienna. The three movements follow a standard fast-slow-fast pattern; the last being a sprightly Rondo, part of which features in the soundtrack of an episode of Inspector Morse: Who Killed Harry Field?

After generous applause, Giltberg returned to the stage to play a very solo encore piece. I didn’t recognize it, but someone I know who was there told me it was by Robert Schumann but didn’t know the name. When I got home I spent a good half-hour going through recordings until I finally identified it as the Arabeske in C Major. Anyway, it was a very nice way to send us into the wine break.

After the interval we had Anton Bruckner‘s monumental Symphony No. 9, which was unfinished at Bruckner’s death in 1896. Insufficient material was recovered after the composer’s death to enable a reconstruction of the missing 4th movement, so this work is generally performed in its incomplete state with only three movements. Even so, it’s an immense work in both length and ambition, lasting over an hour in performance and calling for a large orchestra.

The majestic first movement (marked FeierlichMisterioso; solemn & mysterious) with its soaring themes and thunderous climaxes always puts me in mind of a mountaineering expedition, with wonderful vistas to experience but with danger lurking at every step. At times it’s rapturously beautiful, at times terrifying. It’s not actually about mountaineering, of course – Bruckner meant this symphony to be an expression of his religious faith, which, in the latter years of his life must have been pretty shaky if the music is anything to go by.

The second movement (Scherzo) is all juddering rhythms, jagged themes and harsh dissonances reminiscent (to me) of Shostakovich. It alternates between menacing, playful and cryptic; the frenzied animation of central Trio section is especially disconcerting.

The last movement  (Adagio)  begins restlessly, with an unaccompanied violin theme and then becomes more obviously religious in character in various passages of hymn-like quality, still punctuated by stark crescendi. In this movement Bruckner doffs his cap in the direction of Richard Wagner,  especially when the four Wagner tubas appear, and the movement reaches yet another climax with the brass bellowing out the initial violin theme. This dies away and the movement comes to an unresolved, poignant conclusion. With a long pause in silence as if to say “that’s all he wrote”, the concert came to an end.

Although I’ve loved this work for many years I’ve only ever heard it once before in concert.  The live performance definitely adds other dimensions you will miss on a recording and I enjoyed it enormously. For one thing you can see how hard the musicians – especially the cellos and basses – have to work. The sight of a large symphony orchestra working together to produce amazing sounds is quite something.

The National Symphony Orchestra Ireland may not be the Berlin Philharmonic but I was generally very impressed, there was split note in the brass section near the end, but this was a minor blemish. The performance was very warmly received by the audience. The NCH wasn’t full, but it was quite a good attendance.

That’s not quite the end of my concert-going for 2025. I’m off to Messiah next week. Well, you have to, don’t you? It’s Christmas..

Weekly Update from the Open Journal of Astrophysics – 06/12/2025

Posted in OJAp Papers, Open Access, The Universe and Stuff with tags , , , , , , , , , , , , , , , , , , , , , , , , , , , on December 6, 2025 by telescoper

Once again it’s time for the usual Saturday morning update of the week’s new papers at the Open Journal of Astrophysics. Since the last update we have published a further six papers, which brings the number in Volume 8 (2025) up to 190, and the total so far published by OJAp up to 425. I blogged about the significance of the latter figure here.

The first paper this week is “The galaxy-IGM connection in THESAN: observability and information content of the galaxy-Lyman-alpha cross-correlation at z>6” by Enrico Garaldi (U. Tokyo, Japan), Verena Bellscheidt (Tech. U. Munich, Germany), Aaron Smith (U. Texas Austin, USA) and Rahul Kannan (York U. Canada). This paper was published on Monday 1st December 2025 in the folder Cosmology and Nongalactic Astrophysics. It describes an investigation of the impact of observational limitations on the ability to retrieve the intrinsic galaxy-Lyman-alpha cross correlation from line-of-sight observations.

The overlay is here:

 

 

You can find the officially accepted version on arXiv here and the Fediverse announcement is here:

Open Journal of Astrophysics

New Publication at the Open Journal of Astrophysics: "The galaxy-IGM connection in THESAN: observability and information content of the galaxy-Lyman-alpha cross-correlation at z>6" by Enrico Garaldi (U. Tokyo, Japan), Verena Bellscheidt (Tech. U. Munich, Germany), Aaron Smith (U. Texas Austin, USA) and Rahul Kannan (York U. Canada)

doi.org/10.33232/001c.151666

December 1, 2025, 8:37 am 1 boosts 0 favorites

The second paper of the week is “A Less Terrifying Universe? Mundanity as an Explanation for the Fermi Paradox” by Robin H.D. Corbet (U. Maryland, USA). This paper was published on 1st December 2025 in the folder Instrumentation and Methods for Astrophysics. It presents a discussion of possible explanations for the lack of s evidence for the presence of technology-using extraterrestrial civilizations in the Galaxy (usually called the Fermi paradox). The overlay is here:

 

 

You can find the official version of this one on arXiv here. The federated announcement on Mastodon is here:

Open Journal of Astrophysics

New Publication at the Open Journal of Astrophysics: "A Less Terrifying Universe? Mundanity as an Explanation for the Fermi Paradox" by Robin H.D. Corbet (U. Maryland, USA)

doi.org/10.33232/001c.151454

December 1, 2025, 8:50 am 2 boosts 2 favorites

 

Next one up is “Sulphur abundances in star-forming regions from optical emission lines: A new approach based on photoionization models consistent with the direct method” by Enrique Pérez-Montero, Borja Pérez-Díaz, & José M. Vílchez ( (Instituto de Astrofísica de Andalucía, Spain), Igor A. Zinchenko (LMU, Germany), Asier Castrillo, Marta Gavilán, Sandra Zamora & Ángeles I. Díaz (Universidad Autonoma de Madrid, Spain). This was published on 1st December 2025 in the folder Astrophysics of Galaxies. This study uses the emission lines produced in the optical part of the spectrum and with photoionization models to derive sulphur chemical abundances in the gas-phase of star-forming galaxies.

The overlay is here:

 

 

You can find the official accepted version on arXiv here. The fediverse announcement is here:

Open Journal of Astrophysics

New Publication at the Open Journal of Astrophysics: "Sulphur abundances in star-forming regions from optical emission lines: A new approach based on photoionization models consistent with the direct method" by Enrique Pérez-Montero, Borja Pérez-Díaz, & José M. Vílchez ( (Instituto de Astrofísica de Andalucía, Spain), Igor A. Zinchenko (LMU, Germany), Asier Castrillo, Marta Gavilán, Sandra Zamora & Ángeles I. Díaz (Universidad Autonoma de Madrid , Spain)

doi.org/10.33232/001c.151253

December 1, 2025, 9:12 am 0 boosts 0 favorites

The fourth article of the week is “Bayesian Posteriors with Stellar Population Synthesis on GPUs” by Georgios Zacharegkas & Andrew Hearin (Argonne National Laboratory, USA) and Andrew Benson (Carnegie Observatories, USA). This is an exploration of a range of computational techniques aimed at accelerating Stellar Population Synthesis predictions of galaxy photometry using the JAX library to target GPUs (Graphics Processing Units, in case you didn’t know). This paper was published on Tuesday December 2nd 2025 in the folder Astrophysics of Galaxies.

The overlay is here:

 

You can find the official published version on arXiv here. The Fediverse announcement follows:

Open Journal of Astrophysics

New Publication at the Open Journal of Astrophysics: "Bayesian Posteriors with Stellar Population Synthesis on GPUs" by Georgios Zacharegkas & Andrew Hearin (Argonne National Laboratory, USA) and Andrew Benson (Carnegie Observatories, USA)

doi.org/10.33232/001c.151255

December 2, 2025, 7:38 am 3 boosts 1 favorites

Next one up is “IAEmu: Learning Galaxy Intrinsic Alignment Correlations” by Sneh Pandya Yuanyuan Yang, Nicholas Van Alfen, Jonathan Blazek and Robin Walters (Northeastern University, Boston, USA). This presents a neural-network-based emulator that predicts the galaxy position-position, position-orientation, and orientation-orientation, correlation functions and their uncertainties using mock catalogs based on the halo occupation distribution (HOD) framework. It was published on December 2nd 2025 in the folder Cosmology and Nongalactic Astrophysics. The overlay is here:

The official accepted version can be found on arXiv here. The Mastodon announcement is here:

Open Journal of Astrophysics

New Publication at the Open Journal of Astrophysics: "IAEmu: Learning Galaxy Intrinsic Alignment Correlations" by Sneh Pandya Yuanyuan Yang, Nicholas Van Alfen, Jonathan Blazek and Robin Walters (Northeastern University, Boston, USA)

doi.org/10.33232/001c.151749

December 2, 2025, 7:52 am 1 boosts 0 favorites

The last paper for this weel is “Unraveling the Nature of the Nuclear Transient AT2020adpi” by Paarmita Pandey (Ohio State University, USA) and a team of 15 others based in the USA, UK and Australia. This was published on Thursday December 4th 2025 in the folder High-Energy Astrophysical Phenomena. It is an investigation into a particular transient event AT2020adpi and a discussion of whether it is an extreme example of AGN variability or a Tidal Disruption Event (TDE). The overlay is here:

You can find the officially-accepted version on arXiv here, and the Mastodon announcement is here:

Open Journal of Astrophysics

New Publication at the Open Journal of Astrophysics: "Unraveling the Nature of the Nuclear Transient AT2020adpi" by Paarmita Pandey (Ohio State University, USA) and 15 others based in the USA, UK and Australia

doi.org/10.33232/001c.151453

December 4, 2025, 8:48 am 1 boosts 0 favorites

And that concludes the update for this week. I will do another next Saturday.

Viva Chair

Posted in Biographical, Maynooth with tags , , , , on December 5, 2025 by telescoper

Yesterday afternoon I acted as Chair of the viva voce examination for a PhD degree in the Department of Mathematics & Statistics at Maynooth University. I have done this once before at Maynooth, in the Department of Biology, but had to look back through my archive of blog posts to find out when that was: it was in June 2023.

For those of you not familiar with how this works, a PhD involves doing research into a particular topic and then writing up what you’ve done in a thesis. The thesis is a substantial piece of work, often in the region of 100,000 words (200 pages or so), which is then assessed by two examiners (one internal to the university at which the research was done, and one external). They read copies of the thesis and write preliminary reports on it. Then the candidate has to defend it in an oral examination, which was what happened yesterday, after which they make a recommendation to the university about whether the degree should be awarded.

There aren’t many rules for how a viva voce examination should be conducted or how long it should last, but the can be as short as, say, 90 minutes and can be as long as 5 hours or more. The examiners usually ask a mixture of questions, some about the details of the work presented and some about the general background. Sometimes, especially in Mathematics, the candidate might be asked to use the chalkboard to explain something, as was the case yesterday.

The unpredictable content of a viva voce examination makes it very difficult to prepare for, and it can be difficult and stressful for the candidate (as well as just tiring, as it can drag on for a long time). However, call me old-fashioned but I think if you’re going to get to call youself Doctor of Philosophy you should expect to have to work for it. 

I found it interesting when I first arrived here that viva voce examinations at Maynooth follow a similar practice to those at my previous institution, Cardiff University my previous institution, in that each viva has a Chair as well as the usual internal and external examiners. The Chair is really only present to ensure fair play, that proper procedure is followed, and that all the paperwork is done in timely fashion. The Chair is rarely (if ever) called upon to intervene in the viva itself, though I have on some previous occasions done so, mainly to ask if the candidate and/or examiners would like to take a comfort break. Other than that it’s just a matter of sitting quietly and getting on with something else while the viva proceeds.

I have done quite a lot of examinations as internal or external examiner over the years and most institutions don’t have a Chair – only the two examiners and the candidate are present. Cardiff University is an exception: I chaired a quite a few vivas when I was there. The difference there was that the Chair was from the same School (Physics & Astronomy) as the candidate, whereas in Maynooth the Chair must be from a different Department (which is why I was asked to Chair examinations in Biology and, more recently, Mathematics).

I think having an independent Chair is a good idea, but I do understand that it involves finding a person willing to do it which, it seems, sometimes slows down the organization of a viva, as the process does not start until a Chair is appointed.

Anyway, in this case it all went well. The candidate passed, the forms were filled in and sent to the relevant people. Now there are just minor corrections to be done, everything approved at the relevant Faculty meeting, and then the PhD degree can be conferred.

Like a Million Pounds…

Posted in Biographical, Open Access with tags , , , , , , , on December 4, 2025 by telescoper

I’ve come down with some sort of lurgy and had to cancel a tutorial that was due to take place today, which I am sorry about. I did, however, manage to rise from my sick bed earlier this morning to publish a paper at the Open Journal of Astrophysics. When I checked the publishing dashboard I saw that this one is paper No. 425. This is a significant figure if you reckon by the cost of an Article Processing Charge (APC) at Monthly Notices of the Royal Astronomical Society. The current APC is £2356 per paper. If you multiply this by 425 the result is just over a million pounds (£1,001,300 to be exact). The Open Journal of Astrophysics, being a Diamond Open Access journal, is totally free for authors.

I mentioned a couple of weeks ago, that this is a small fraction of the money being wasted by the astronomical community worldwide on publication charges but if even a small operation like ours can save a million pounds, just think of what could happen if we all published this way! For one thing, there would certainly be more money available for actual research. That doesn’t only go for astronomy, of course: almost every scientific discipline is being ripped off by publishers who have hijacked the Open Access movement to generate income from APCs.

I’ll repeat the quotation I posted yesterday about a scandal relating to corporate publishing giant Elsevier

The scandal exposes the windfall profits of scientific publishers, who in recent years have amassed billions of dollars in earnings from public funds earmarked for science.

It’s a shocking idea, I know, but what if we spent public funds on what they are supposed to be spent on rather than handing millions to greedy publishers?

Yet Another Elsevier Scandal

Posted in Open Access with tags , , , on December 3, 2025 by telescoper

I wish to draw your attention to an article in the Spanish newspaper El Pais. I encourage you to read the full article, which in English here, and the headline is this:

The article is about a very dodgy journal called Science of the Total Environment published by Elsevier. As far as I can tell, despite the scandal, this journal is still listed in Scopus which is meant to mean that it is a quality journal. One shouldn’t be surprised however, because Scopus is itself owned by Elsevier. Why anyone would trust Scopus for anything is completely beyond me.

As well as the huge revenues and profit margins revealed in the article, it also mentions that Erik Engstrom, CEO of RELX (the multinational that owns Elsevier), earned more than €15 million ($17.4 million) in 2024 between his salary and other compensation. Nice work if you can get it…

Here’s a quote:

The scandal exposes the windfall profits of scientific publishers, who in recent years have amassed billions of dollars in earnings from public funds earmarked for science.

Quite so. I’ve been saying as much for years, in fact, and it is the major reason for setting up the Open Journal of Astrophysics. In my opinion, however, the scandalous behaviour of publishers is only half the problem: equally to blame are the institutions that go along with it.

MAUVE Image Simulation

Posted in The Universe and Stuff with tags , , , on December 2, 2025 by telescoper

Since the successful launch of the MAUVE satellite on Friday, the telescope has been undergoing verification and calibration. Meanwhile, I’ve been hard at work using my advanced image processing skills to simulate what images of astronomical objects seen in other wavebands might look like using MAUVE.

Here’s an example.

The original picture below is a famous image that needs no introduction. Simply move the slider to the left to reveal the MAUVE version…

P.S. Apologies that the software does not quite scale the images correctly.

World Aids Day

Posted in Biographical, LGBTQ+ with tags , , on December 1, 2025 by telescoper

Today, 1st December, is World Aids Day, which is dedicated to raising awareness of the AIDS pandemic caused by the spread of HIV infection, mourning those who have died of the disease, and showing solidarity with those living with HIV. In my case it’s also a day for remembering how lucky I have been.

Here’s me just about to leave the house this morning with my red ribbon.

Eight Years in Maynooth…

Posted in Artificial Intelligence, Biographical, Education, Maynooth with tags , , on December 1, 2025 by telescoper
Maynooth University Library, home of the famous cat

Today is 1st December 2025, which means that it’s eight years to the day since I started work at Maynooth University. Despite the frustrations, I’m still very happy I made the move all that time ago.

We’ve now had more than a year since the merger of the former Departments of Theoretical and Experimental Physics. This has gone pretty well, actually, with significant improvements in terms of some steps forward in rationalising teaching. It does, however, feel less like a merger and more like an acquisition, with the theoretical activity effectively subsumed into the old Experimental Physics department. I suppose that was inevitable given the relative sizes of the two former Departments, but it has led to a loss of identity and the loss of the group spirit we use to have in Theoretical Physics. To add to this a number of familiar faces have left – two of my own PhD students, Aonghus Hunter-McCabe and Aoibhinn Gallagher have graduated and left, as have others with different supervisors. I am delighted for their success, of course, but will miss having them around.

I continue to enjoy teaching, and was pleasantly surprised to continue doing the same modules this academic year as last. The big change in that regard has been the adoption of different assessment methods to deal with the possibility of students using AI to do their coursework. That seems to be going reasonably well, though I’ll have to wait until the January examinations to see the outcomes.

The thing I’m probably most proud of over the past eight years is, with the huge help of staff at Maynooth University Library, getting the Open Journal of Astrophysics off the ground and attracting some excellent papers. This year has seen yet more significant growth, publications this year set to reach 200, after 120 in 2024 and just 50 the year before that (2024). We’re still smaller than many of the mainstream astrophysics journals, but we’re still growing…

Anyway, eight years of service mean that only two remain until I can claim the full state pension. I’ll be retiring as soon as I can afford to. There were Open Days at Maynooth on Friday and Saturday (28th and 29th November, respectively). These were for prospective students to enter in September 2026. Since I don’t teach any first or second year Physics modules now, and that is likely to continue, it looks like I’ll never see any of that intake in class.

More AI garbage

Posted in Artificial Intelligence with tags , , , on November 30, 2025 by telescoper

I’m indebted to a post on Mastodon for drawing my attention to a blog post about a paper with the title Bridging the gap: explainable ai for autism diagnosis and parental support with TabPFNMix and SHAP that appeared in the journal Nature Scientific Reports (which claims to be peer-reviewed).

Here is Figure 1 of that paper:

I’m no expert on Autism Diagnosis, but I’m pretty sure that neither “Fexcectorn” nor “frymblal” (medical or otherwise) nor “runctitional” are words in the English language. Why do the person’s legs go through the table? And why is Autism represented by a bicycle? This nonsensical figure was clearly generated by AI, as is much of the text of the paper. How on Earth did this crap pass peer review?

Still, Nature Scientific Reports is indexed in Scopus, which we all know is a watertight guarantee of quality…

P.S. The article was published on 19th November 2025. It is now prefaced by an Editor’s Note: “Readers are alerted that the contents of this paper are subject to criticisms that are being considered by editors. A further editorial response will follow the resolution of these issues.”

Weekly Update from the Open Journal of Astrophysics – 29/11/2025

Posted in OJAp Papers, Open Access, The Universe and Stuff with tags , , , , , , , , , , , , , , , , , , , , on November 29, 2025 by telescoper

It’s Saturday again, so it’s time for the usual update of the week’s new papers at the Open Journal of Astrophysics. Publishing this week was interrupted by the Thanksgiving holiday in the United States, which meant there were no arXiv announcements yesterday. Nevertheless, since the last update we have published another four papers, which brings the number in Volume 8 (2025) up to 184, and the total so far published by OJAp up to 419.

The first paper this week is “A theoretical prediction for the dipole in nearby distances using cosmography” by Hayley J. Macpherson (U. Chicago, USA) and Asta Heinesen (Niels Bohr Institute, Denmark). This was published on Monday 24th November 2025 in the folder Cosmology and Nongalactic Astrophysics. It presents a method to predict the dipole in luminosity distances that arises due to nearby inhomogeneities to leading-order correction to the standard isotropic distance-redshift law. Incidentally, I wrote about a talk by one of the authors here.

The overlay is here:

 

You can find the officially accepted version on arXiv here and the Fediverse announcement is here:

Open Journal of Astrophysics

New Publication at the Open Journal of Astrophysics: "A theoretical prediction for the dipole in nearby distances using cosmography" by Hayley J Macpherson (U. Chicago, USA) and Asta Heinesen (Niels Bohr Institute, Denmark)

doi.org/10.33232/001c.150319

November 24, 2025, 8:25 am 2 boosts 1 favorites

 

The second paper of the week is “A Targeted Gamma-Ray Search of Five Prominent Galaxy Merger Systems with 17 years of Fermi-LAT Data” by Siddhant Manna and Shantanu Desai (IIT Hyderabad Kandi, India). This one was published on Tuesday November 25th 2025 in the folder marked High-Energy Astrophysical Phenomena. It describes a search for gamma-ray emission in Fermi-LAT data from five merging galaxy systems with marginal detections for two of them

The overlay is here:

 

You can find the official version of this one on arXiv here. The federated announcement on Mastodon is here:

 

Next one up is “Metallicity fluctuation statistics in the interstellar medium and young stars – II. Elemental cross-correlations and the structure of chemical abundance space” by Mark R. Krumholz (ANU, Australia), Yuan-Sen Ting (Ohio State U., USA), Zefeng Li (Durham U., UK), Chuhan Zhang (ANU), Jennifer Mead (Columbia U., USA) and Melissa K. Ness (ANU). This was published in the folder Astrophysics of Galaxies on Wednesday November 26th. It presents an extended stochastically-forced diffusion model for the chemical evolution of galaxies, making quantitative predictions for the degree of correlation in abundance patterns in both gas and young stars.

The overlay is here:

 

You can find the official accepted version on arXiv here. The fediverse announcement is here:

Open Journal of Astrophysics

New Publication at the Open Journal of Astrophysics: "Metallicity fluctuation statistics in the interstellar medium and young stars – II. Elemental cross-correlations and the structure of chemical abundance space" by Mark R. Krumholz (ANU, Australia), Yuan-Sen Ting (Ohio State U., USA), Zefeng Li (Durham U., UK), Chuhan Zhang (ANU), Jennifer Mead (Columbia U., USA) and Melissa K. Ness (ANU)

doi.org/10.33232/001c.150356

November 26, 2025, 8:34 am 1 boosts 1 favorites

The fourth and final paper of the week is “Simulating realistic Lyman-alpha emitting galaxies including the effect of radiative transfer” by Hasti Khoraminezhad & Shun Saito (Missouri Institute of Science & Technology, USA), Max Gronke (U. Heidelberg, Germany) and Chris Byrohl (MPA Garching, Germany). An empirical model for Lyman-alpha emitters (LAEs) which provides predictions for the halo occupation distributions and relationship between luminosity and halo mass, including the distribution of satellite LAEs. It was published on Thursday November 27th 2025 in the folder Astrophysics of Galaxies.

The overlay is here:

You can find the official published version on arXiv here. The Fediverse announcement follows:

Open Journal of Astrophysics

New Publication at the Open Journal of Astrophysics: "Simulating realistic Lyman-alpha emitting galaxies including the effect of radiative transfer" by Hasti Khoraminezhad & Shun Saito (Missouri Institute of Science & Technology, USA), Max Gronke (U. Heidelberg, Germany) and Chris Byrohl (MPA Garching, Germany)

doi.org/10.33232/001c.151254

November 27, 2025, 9:20 am 1 boosts 1 favorites

And that concludes the update for this week. I will do another next Saturday.