Blu Tack Art

Posted in Art, Maynooth with tags , , on August 26, 2025 by telescoper

My attention was drawn today to this scuplture which is currently on display in the Department of Physics at Maynooth University. The artist and subject are unknown (to me) and the work is not dated, but the material is clearly Blu Tack, a putty-like pressure-sensitive adhesive commonly used to attach lightweight objects to walls, doors or other dry surfaces.

Five Years at Home in Maynooth

Posted in Biographical, Covid-19, Maynooth with tags , , , , on August 26, 2025 by telescoper

I’ve received a number of bills and renewal notices of various kinds over the last few weeks, indicating the anniversary of me completing the purchase of, and moving into, my house in Maynooth. In fact it was five years ago today that I wrote a blog post occasioned by the fact that I’d collected the keys to this property, though it wasn’t until the following weekend that I actually stayed overnight here for the first time.

I was very lucky to be able to able to buy this property in what turned out to be a short window in the Covid-19 lockdown restrictions in the Summer of 2020. There were plans to return to on-campus teaching in September with drastic restrictions on the number of students in each venue. That plan was subsequently changed and then changed again to move almost all teaching back online, and then again to move again into a “Level 5” lockdown.

I was Head of Department back then. My memories of that time were immense levels of stress and frustration, constantly having to change our teaching arrangements with very little support from the University as well as shouldering a full teaching load. In order for the institution to carry on functioning, all teaching and support staff to do huge amounts of unpaid overtime while the institution built up a massive financial surplus. I could say more about the callous indifference to staff and students alike shown at that time by one particular member of The Management, but I think I had better save it for when I’ve retired.

Given the enormous workload I had then, it was to be almost another year before I had time to collect most of my belongings from my house in Cardiff and longer still before I managed to sell it and pay off the mortgage I took out to buy my house here. All this was much more complicated than I expected when I moved to Ireland!

Anyway, many of the things I’d planned to do when I moved here still aren’t done. I bought some old furniture from the previous owner with the intention of replacing it with new, for example, but I somehow never got round to that. Nor have I replaced the old windows, gutters, etc, yet…

One thing I have done is change the refuse collection. When I moved in I took over a contract with  Bord na Móna (literally “The Turf Board”), a company set up in 1946 to supply peat as a form of fuel but now diversified into other activities such as collecting and disposing waste. Over the last year the service provided by this company has degenerated to the point of complete unreliability. When I looked around for a replacement I found that Bord na Móna was also significantly more expensive than its competitors. Earlier this summer, therefore, I swtiched to a company called Greyhound which so far seems much better organized and is about 2/3 the price. That meant I had two sets of wheelie bins cluttering up my garden for about two months until Bord na Móna got around to removing theirs.

Our Million-Dollar Journal!

Posted in Open Access with tags , , , , on August 25, 2025 by telescoper

The Article Processing Charge (APC) for publishing a paper in Monthly Notices of the Royal Astronomical Society (MNRAS) is now £2356. Converting that to dollars at current rates gives about $3150 per paper.

As of today, 25th August 2025, the Open Journal of Astrophysics has published 359 articles.

Using the dollar cost of an MNRAS APC as a benchmark – many journals charge more – this means that we have now saved the global astrophysics community about $1.1M (for an outlay of around $10K).

Yes, we are still a small journal but the size of that figure should help you understand how much money is being wasted globally on publishing fees that could instead be spent on actual research.

It’s good to see that more and more researchers are seeing the light and switching to Diamond Open Access. Today we published the 124th article in Volume 8 (2025) of the Open Journal of Astrophysics. This means that we have so far in 2025 published more papers than we published in the whole of 2024. At the end of August we will be about two-thirds of the way through the year so I expect we will publish more than 180 articles this year.

I’d like to take this opportunity to thank everyone involved in running this journal: the Editors, staff at Maynooth University Library who help us, the host of volunteer referees, and of course our authors. I’m confident that, together, we can change the publishing landscape in astrophysics, and put the power (and money) back in the hands of researchers instead of greedy publishers.

This is a slightly-edited version of a post I made last week for the Open Journal of Astrophysics blog.

More Google Garbage

Posted in Uncategorized with tags , , , on August 24, 2025 by telescoper

I couldn’t resist sharing this as part of an occasional series about Google AI Garbage. Earlier this evening (Sunday 24th August 2025), I searched to see if there was a BBC Proms concert this evening. This is what the AI summary produced. I think it’s priceless, right down to the last line!

A Poem by Alice Oswald

Posted in Politics with tags , , , , , , , , on August 24, 2025 by telescoper

I was shocked to find out yesterday that the poet (and former Professor of Poetry at Oxford University) Alice Oswald has been arrested under the UK’s draconian anti-terrorism laws at a peaceful protest for holding up a sign supporting Palestine Action, an organization opposed to the ongoing genocide being committed by Israel against the people of Gaza. Among the others arrested were an 89-year old woman and a blind man in a wheelchair. I expect these absurd and unjust actions will achieve the exact opposite of what the Government intended.

Anyway, I am an admirer of the poetry of Alice Oswald. I posted one of her poems here, and have four collections of her poems:

I thought I would post another now to express solidarity with Alice Oswald. This one is from the first of the collections shown above, in which it is simply titled Sonnet, though it is not a form of sonnet I have ever seen before!

Spacecraft Voyager 1 has boldly gone
into Deep Silence carrying a gold-plated disc inscribed with
whale-song
it has bleeped back a last infra-red fragment of language
and floated way way up over the jagged edge
of this almost endless bright and blowy enclosure of weather
to sink through a new texture as tenuous as the soft upward
pressure of an an elevator
and go on and on falling up steep flights of blackness with
increasing swiftness
beyond the Crystalline Cloud of the Dead beyond Plato beyond
Copernicus
O meticulous swivel cameras still registering events
among those homeless spaces gathering in that silence
that hasn't yet had time to speak in that increasing sphere
of tiny runaway stars notched in the year
now you can look closely at massless light
that is said to travel freely but is probably in full flight

by Alice Oswald

Weekly Update from the Open Journal of Astrophysics – 23/08/2025

Posted in OJAp Papers, Open Access, The Universe and Stuff with tags , , , , , , , , , , , , , , , , , , , , , , , , , on August 23, 2025 by telescoper

So it’s Saturday again, so it’s time for the usual update of papers published at the Open Journal of Astrophysics which I do every Saturday. Since the last update we have published six new papers, which brings the number in Volume 8 (2025) up to 122, and the total so far published by OJAp up to 357. As I mentioned here we have overtaken the total of 120 published in Volume 7 (2024) and are on track for in excess of 180 publications in 2025.

The first paper to report this week is “Mass-feeding of jet-launching white dwarfs in grazing and common envelope evolution” by Noam Soker (Technion, Haifa, Israel). This was published on Tuesday 19th August in the folder Solar and Stellar Astrophysics. It proposes a theoretical suggestion about the production of jets in common-envelope evolution with massive stars.

The overlay is here:

You can make this larger by clicking on it, as you can with all the overlays below. The officially accepted version of this paper can be found on the arXiv here.

The second paper this week, published on Wednesday 20th August in the folder Earth and Planetary Astrophysics, is “Transition metal abundance as a key parameter for the search of Life in the Universe” by Giovanni Covone and Donato Giovannelli (University of Naples, Italy). This paper presents an argument that the availability of transition elements is an essential feature of habitability, and should be considered as such in selecting exoplanetary targets in the search for life.

The overlay is here:

You can find the officially accepted version of the paper on arXiv here.

The third paper this week, also published on 20th August 2025 in the folder Earth and Planetary Astrophysics, is “Discrete element simulations of self-gravitating rubble pile collisions: the effects of non-uniform particle size and rotation” by Job Guidos, Lucas Kolanz and Davide Lazzati (Oregon State University, USA).  This presents a new computer code for simulating the growth of granular masses through collisions of smaller particles and discusses results generated by it.

The overlay for this one is here:

You can find the officially accepted version on arXiv here.

The next paper, the fourth this week, is “Seeing the Outer Edge of the Infant Type Ia Supernova 2024epr in the Optical and Near Infrared” by W.B. Hoogendam (University of Hawaii, USA) and 32 others – too numerous to list by name – based in various institutes in the USA, Australia, UK, Denmark, Taiwan and China. This paper was also published on Wednesday 20th August 2025, but in the folder High-Energy Astrophysical Phenomena.  The article reports on the results of optical-to-near-infrared photometry and spectroscopy of the Type Ia supernova (SN Ia) 2024epr and a discusses how these challenge models for this sort of supernova.

The overlay is here:

You can find the officially accepted version on arXiv here.

The fifth paper this week is “Computing Nonlinear Power Spectra Across Dynamical Dark Energy Model Space with Neural ODEs” by Peter L. Taylor of Ohio State University (USA).  This one shows how to compute the evolution of cosmological power spectra into the non-linear regime via neural differential equations. It was published on Friday 22nd August 2025 in the folder Cosmology and NonGalactic Astrophysics. The overlay is here:

You can find the officially accepted version on arXiv here.

And finally for this week we have “Symbiotic star candidates in Gaia Data Release 3” by Samantha E. Ball & Benjamin C Bromley (University of Utah, USA) and Scott J. Kenyon (Smithsonian Observatory, USA). This paper was published on Friday 22nd August in the folder Solar and Stellar Astrophysics. It describes a new search for symbiotic star candidates in Gaia Data Release 3 (GDR3), based on astrometric, photometric, and spectroscopic information. The overlay is here:

You can find the officially accepted version of this one on arXiv here.

And that’s all the papers for this week. I suppose there will come a time when we publish a paper on every day of the week and each week’s summary will contain a paper in each of the astro-ph categories on arXiv, but we haven’t done that yet. This week we published on every day but Monday 18th August, and have papers in four of the six categories.

Moving On

Posted in Education, Maynooth with tags , , , , , , , on August 22, 2025 by telescoper

Last week I wrote a post about the loose ends of the academic year, one of which concerned my PhD student Aoibhinn, who passed her viva voce examination way back in May, who had to submit a bound copy of the thesis to the relevant office by September 6th so that her degree could be ratified by Faculty and Academic Council. She has now done that, and in the process kindly made me an extra copy of the Authorized Version to put on my shelf:

It will be easy to find on my shelf because it’s a different colour from the others. Aoibhinn will be off to Germany for a postdoctoral fellowship after her conferring ceremony in October.

In subsequent post I mentioned a plethora of meetings to take place this week, all of which went off without much incident. The various Departmental Examination Boards did their business and students will receive their results on September 5th. Students involved in these will be moving on in various ways: some will be graduating, some progressing to the next year of their course and others – though not very many at all – will be leaving without qualifying.

Meanwhile, elsewhere in Ireland, students in the Class of 25 have today been receiving their school Leaving Certificate results. As expected, the proportion at the highest grade (H1) is down significantly compared 2024. On the other hand, the total number of students taking  Leaving Certificate examinations is significantly higher  than last year. You can find all the national statistics here.

How these nationwide effects  will work their way through to undergraduate admissions at Maynooth remains to be seen. Applicants will get offers through the CAO system next week; the points required by each higher education institution should be available online on Wednesday 27th. The Irish Times traditionally publishes a pull-out supplement showing all the offers for all courses at all universities across the sector the following day, i.e. on Thursday 28th September.

By the end of next week, therefore, we’ll have some sort of an idea how many students we will have entering the University in September 2025 and can begin moving on to the next academic year. One thing I’ve already got sorted out – way ahead of previous years – is my teaching timetable for Semester 1. Usually I’ve been happy if I had this before the first week of term! My new timetable makes Tuesdays and Thursdays my heaviest teaching days, but gives me Wednesday free for research and other things that I’ve started planning already.

Il Sorpasso

Posted in Film, Open Access with tags , , , on August 21, 2025 by telescoper

Just a quick note to say that yesterday we published the 120th article in Volume 8 (2025) of the Open Journal of Astrophysics. This means that we have so far in 2025 published as many papers we published in the whole of 2024. At the end of August we will be about 2/3 of the way through the year so I expect we will publish more than 180 articles this year. It may be more than that because we have a group of articles in the pipeline that will be published simultaneously in a special issue, which may be completed this year. We might in this case reach 200 altogther for 2025, but if not the special issue will appear in 2026.

The relevance of all this to the 1962 Italian comedy film Il Sorpasso is entirely negligible, except that I like the movie.

I hope this clarifies the situation

The Things Are Here – The Dizzy Gillespie Reunion Big Band

Posted in Jazz with tags , , , , on August 20, 2025 by telescoper

Back in the 1940s, early in his career, trumpeter Dizzy Gillespie incorporated the theme from a tune called Be-Bop, or sometimes Dizzy’s Fingers, into a swirling big band arrangement and called the resulting piece Things to Come. It was a wild, gyrating score usually played at breakneck speed (often around 300bpm) that invariably proved a handful to perform. The Things Are Here is the eventual sequel to that composition that the Dizzy Gillespie Reunion Big Band played in the 1960s. Many concert performances of this are very long indeed, but this one (recorded in Berlin in 1968) lasts only about 8 minutes. I have this on vinyl but haven’t get got around to transferring it to digital. Here you hear the stunning power and virtuosity of this thrilling band; there must have been a tough entrance examination to get a place in it!

As you’d expect there’s a lot of solo space in this performance for Gillespie himself, but also room for solos and duets from the other musicians, including James Moody and Paul Jeffrey on tenor saxophone, Sahib Shihab on alto saxophone, Cecil Payne on baritone sax, Curtis Fuller on trombone and, right at the end, Otis Finch brings the house down with a drum solo.

It’s a wild, white-knuckle ride, so strap yourself in!

Tacitus on Agricola in Scotland about Ireland

Posted in History with tags , , , , , , , , on August 19, 2025 by telescoper

Some years ago I came across a blog post relating to the discovery of a fortified settlement at Drumanagh (near Dublin) where Roman coins and goods have been found. It might have been a Roman military site, but in my mind it could equally well have been a Celtic settlement and the finds might have been loot from elsewhere.

I do find it a bit hard to believe that no Romans ever set foot in Ireland, though, and Drumanagh may well have been some sort of trading post or temporary fort for a reconnaissance mission. If that site is Roman, and that was all there was, then it didn’t amount to a full invasion and there’s certainly nothing like the roads or other infrastructure that’s so common in England and Wales.

I thought about this when at the weekend I was “reorganising” my bookshelves (by which I mean changing from one form of disorganization to another), when I came across some old Latin textbooks that included excerpts from the book De vita et moribus Iulii Agricolae which was written by Publius Cornelius Tacitus (Tacitus to you). The Agricola of the title was Gnaeus Julius Agricola, Roman Governor of Britain from around AD 77 until 85. He also happened to be the father-in-law of Tacitus, which probably accounts for the sycophantic tone of some of the writing.

The availability of this book is interesting in itself because only a solitary codicil survived the Roman Era. It eventually became a very popular source in old-fashioned British grammar schools at which Latin was compulsory, as it was at the one I went to, partly because it related to Britain and partly because of the author’s very concise and direct prose which makes much of it quite easy to translate. We didn’t read the whole book at school, but excerpts cropped up regularly to illustrate various grammatical constructions and introduce new vocabulary.

You can find the full Latin text here and an English translation here. I tried Google translate on some passages and it was terrible.

Anyway, as an exercise to my erudite readers I here include sections 23 to 26 which describe part of Agricola’s adventures in Scotland, followed by some comments. Before doing so it is worth mentioning a bit of the context. Agricola’s military campaigns at this time were often carried out in the first instance by water. Scotland was very much bandit country and slogging through the terrain on foot would have led to multiple ambushes and pitched battles.

[23] Quarta aestas obtinendis quae percucurrerat insumpta; ac si virtus exercituum et Romani nominis gloria pateretur, inventus in ipsa Britannia terminus. Namque Clota et Bodotria diversi maris aestibus per inmensum revectae, angusto terrarum spatio dirimuntur: quod tum praesidiis firmabatur atque omnis propior sinus tenebatur, summotis velut in aliam insulam hostibus.

[24] Quinto expeditionum anno nave prima transgressus ignotas ad id tempus gentis crebris simul ac prosperis proeliis domuit; eamque partem Britanniae quae Hiberniam aspicit copiis instruxit, in spem magis quam ob formidinem, si quidem Hibernia medio inter Britanniam atque Hispaniam sita et Gallico quoque mari opportuna valentissimam imperii partem magnis in vicem usibus miscuerit. Spatium eius, si Britanniae comparetur, angustius nostri maris insulas superat. Solum caelumque et ingenia cultusque hominum haud multum a Britannia differunt; [in] melius aditus portusque per commercia et negotiatores cogniti. Agricola expulsum seditione domestica unum ex regulis gentis exceperat ac specie amicitiae in occasionem retinebat. Saepe ex eo audivi legione una et modicis auxiliis debellari obtinerique Hiberniam posse; idque etiam adversus Britanniam profuturum, si Romana ubique arma et velut e conspectu libertas tolleretur.

[25] Ceterum aestate, qua sextum officii annum incohabat, amplexus civitates trans Bodotriam sitas, quia motus universarum ultra gentium et infesta hostilis exercitus itinera timebantur, portus classe exploravit; quae ab Agricola primum adsumpta in partem virium sequebatur egregia specie, cum simul terra, simul mari bellum impelleretur, ac saepe isdem castris pedes equesque et nauticus miles mixti copiis et laetitia sua quisque facta, suos casus attollerent, ac modo silvarum ac montium profunda, modo tempestatum ac fluctuum adversa, hinc terra et hostis, hinc victus Oceanus militari iactantia compararentur. Britannos quoque, ut ex captivis audiebatur, visa classis obstupefaciebat, tamquam aperto maris sui secreto ultimum victis perfugium clauderetur. Ad manus et arma conversi Caledoniam incolentes populi magno paratu, maiore fama, uti mos est de ignotis, oppugnare ultro castellum adorti, metum ut provocantes addiderant; regrediendumque citra Bodotriam et cedendum potius quam pellerentur ignavi specie prudentium admonebant, cum interim cognoscit hostis pluribus agminibus inrupturos. Ac ne superante numero et peritia locorum circumiretur, diviso et ipso in tris partes exercitu incessit.

[26] Quod ubi cognitum hosti, mutato repente consilio universi nonam legionem ut maxime invalidam nocte adgressi, inter somnum ac trepidationem caesis vigilibus inrupere. Iamque in ipsis castris pugnabatur, cum Agricola iter hostium ab exploratoribus edoctus et vestigiis insecutus, velocissimos equitum peditumque adsultare tergis pugnantium iubet, mox ab universis adici clamorem; et propinqua luce fulsere signa. Ita ancipiti malo territi Britanni; et nonanis rediit animus, ac securi pro salute de gloria certabant. Ultro quin etiam erupere, et fuit atrox in ipsis portarum angustiis proelium, donec pulsi hostes, utroque exercitu certante, his, ut tulisse opem, illis, ne eguisse auxilio viderentur. Quod nisi paludes et silvae fugientis texissent, debellatum illa victoria foret.

In [23], around 80 AD, we find that Agricola saw advantage in conquering Scotland as far as the Firth of Clyde (Clota) and Firth of Forth (Bodotria) because the tide would bring his ships a long way inland and they were separated by only a narrow stretch of land. He claims he would have gone further had he had the resources needed to do so.

[24] is the interesting one in light of the introduction to this piece . The fifth year of campaigning would have been 81 AD, long before the construction of Hadrian’s Wall. It says that Agricola crossed in his flagship (literally in the first ship, nave prima). It then goes to say that he garrisoned that part of Britain which faces Hibernia (i.e. Ireland) not out of fear but in hopes of further action. This is because he felt that Ireland offered a strategic connection between the provinces of Britain and Spain.

Some people think that the garrison Agricola formed for his putative future action, ostensibly an invasion of Ireland, was at Ravenglass in modern-day Cumbria, rather than Scotland, but it might have been further North; nobody really knows. My reading of the text is that he crossed the Firth of Clyde to the Mull of Kintyre. I remember as a kid seeing Ireland from the Mull of Kintyre and was told that on a clear day you could see as far as the mountains in Donegal from there.

Tacitus goes on to say that (my emphasis):

Ireland is smaller in size when compared to Britain, but larger than the islands of the Mediterranean. The soil, the climate and the character and manners of its inhabitants differ little from those of Britain, while its approaches and harbours are better known through trade and commerce. We also learn that Agricola has a friendly Irish chieftain in tow, who has been turfed out of his own land.

Agricola had given sanctuary to a minor chieftain driven from home by faction, and held him, under the cloak of friendship, until occasion demanded. My father-in-law often said that with one legion and a contingent of auxiliaries Ireland could be conquered and held; and that it would be useful as regards Britain also, since Roman troops would be everywhere, and the prospect of independence would fade from view.

So Agricola felt that people of Hibernia and Britain were similar and the effect of conquering the former would be to snuff out any hopes of independence in the latter. Either the planned invasion never happened, or Agricola tried it, got his fingers burnt and Tacitus chose to omit it from his account. This seems unlikely because Agricola had enough on his plate dealing with the Scottish campaign without diverting a legion to Ireland.

Anyway, the second emphasized section explains that Ireland’s ports were well known through trade and commerce, so one can infer that Romans were familiar enough to have landed there to trade, etc. I think Drumanagh was probably just one of many such stations.

In [25], a year later. Agricola is already campaigning beyond the Firth of Forth using a combination of naval and land-based forces. The Britons were wrong-footed by the Romans’ use of the sea, but mounted attacks against Roman forts. At the end of this section, Agricola, hearing that his force is about to be attacked, divides his army into three divisions and advances.

I included [26] because it mentions the Ninth Legion (in the accusative case, nonam legionem) because they are being attacked. The Ninth Legion has been the source of much speculation as the “Lost Legion”, as it disappears entirely from the historical record after about 120 AD. This unit was in the thick of the action, many times and was almost wiped out in 61 AD during the rebellion of Boudica and in other rebellions. According to Tacitus it was one of the three parts of Agricola’s army in 83 AD, though it was described as “especially weak” (maxime invalidem), and was in trouble there too, but was eventually rescued by the other two divisions. It doesn’t explain why the Ninth was the most weakened. Had it suffered more casualties than the rest of Agricola’s army or was it just not as well trained? Was part of it left as the garrison described in [24]? Could it have participated in an abortive invasion of Ireland the year before, got badly mauled in the process, and hadn’t recovered to full strength?

Bearing in mind that Tacitus wanted to portrary Agricola in a positive light, perhaps the complete rescue of the Ninth described in the text was exaggerated and its already weakened state was worsened still further by this battle? It wasn’t here that the Lost Legion was lost, however, as it cropped up elsewhere in Britain until at least 108 AD, twenty-five years later, and perhaps as late as 120 AD elsewhere on the continent. I’m not a historian but it seems to me that a plausible explanation of the fate of the Ninth Legion is that it was broken up into detachments and gradually dispersed, rather than being wiped out in one calamitous battle.