I am remiss in having forgotten until now to circulate an open letter that has been set up to express support for the high energy physics theory and particle theory communities in the United Kingdom. I signed the letter a few days ago but neglected to circulate it for further signature.
The letter reads:
We the undersigned wish to raise serious concerns about the current cuts to UK high energy particle physics theory grants by signing up to the letter below. The open letter and list of signatories are printed on this page. Individuals who wish to support this initiative may add their name as a signatory by completing the form below. This letter will be sent to Lord Patrick Vallance (Minister of State for Science, Innovation, Research and Nuclear), Liz Kendall (Secretary of State for Science, Innovation and Technology), Chi Onwurah MP (Chair of the UK House of Commons Science, Innovation and Technology Select Committee), and Prof. Sir Ian Chapman (CEO of UKRI).
We are signing this letter to raise serious concerns about the proposed cuts to high energy physics theory and particle theory in the United Kingdom. The UK is a world leader in this area: its historical activity led to the development of the Standard Model of particle physics and the ongoing development of string theory. UK theoretical physicists provide essential input to major international experiments, including the Large Hadron Collider at CERN and next-generation programmes in neutrino physics, gravitational waves, and cosmology, enabling rigorous interpretation of data and the extraction of fundamental insight. The strength of the UK community lies in its intellectual breadth and integration: researchers operate across phenomenology, formal theory, and their interface, and sustained dialogue between these areas underpins the UK’s leading role in global collaborations and internationally recognised research groups. In parallel, UK theorists advance the theoretical foundations of fundamental physics.
These groups and scientists can only operate thanks to critical funding by UK research council funding.
The current apparent scale of the cuts to the Particle Physics, Astronomy and Nuclear Physics area (30% to the overall budget) will result, when rising costs are taken into account, in a much greater than 50% cut in the number of postdoctoral researchers active in these areas in the UK. This will have a devastating effect on the ability of the UK to maintain its leading role in the subject.
Such funding decisions will affect the famously excellent reputation of the UK university sector. It will risk the health of UK physics departments and will therefore damage economic growth in the UK. Many scientists trained in this sector subsequently move into senior positions in technical industries such as machine learning and finance. Theorists at universities play a crucial role in the training and development of the inventors and disruptors of the future.
We urge UK politicians and leaders in the UK funding organisations to carefully consider the implications of the current direction of funding decisions before it is too late and irreparable damage is done to the UK theory community.
You can sign the letter and see a list of existing signatories here.
It’s Saturday once more, so it’s time for another update of activity at the Open Journal of Astrophysics. After a bumper week last week, this week has been slower on the publication side. Since the last update we have published a further two papers, bringing the number in Volume 9 (2026) to 47 and the total so far published by OJAp up to 495.
I will continue to include the posts made on our Mastodon account (on Fediscience) to encourage you to visit it. Mastodon is a really excellent service, and a more than adequate replacement for X/Twitter (which nobody should be using); these announcements also show the DOI for each paper.
New Publication at the Open Journal of Astrophysics: "Comments on “Little ado about everything” by A. Lapi et al. and on cosmological back-reaction" by Julian Adamek (Universität Zürich, Switzerland)
The second (and last) paper for this week is “Linear map-making with LuSEE-Night” by Hugo Camacho (Brookhaven National Laboratory, USA) and 34 others based in the USA, France, and the Netherlands. This was published on Thursday 5th March in the folder Instrumentation and Methods for Astrophysics. The paper discusses LuSEE-Night (the Lunar Surface Electromagnetics Experiment), a proposed lunar radio telescope using four antennas to map the sub-50 MHz sky with a 5-degree resolution, using the Wiener filter algorithm to manage systematic effects.
The overlay for this one is here:
The official version of the paper can be found on arXiv here and the Fediverse announcement here:
New Publication at the Open Journal of Astrophysics: "Linear map-making with LuSEE-Night" by Hugo Camacho (Brookhaven National Laboratory, USA) and 34 others based in the USA, France, and the Netherlands.
That concludes this week’s (brief update). Based on the number of papers accepted and waiting to be published it is likely we will pass 50 for the year and 500 in total by next week.
P.S. Thank you once again to the many people who have responded to the latest call for editors. I’ve been sending out invitations and getting people onboard as quickly as I can, but I still have a number to get to so please bear with me!
Regular readers of this blog will be surprised to learn that I have, from time to time, been accused of being somewhat pedantic, though not as often as I am accused of being a tad sarastic. Anyway, a certain person recently bought me a copy of On Pedantry (subtitled A Cultural History of the Know-it-all) by Arnoud S.Q. Visser, who is Professor of Textual Culture in the Renaissance at Utrecht University in the Netherlands. Whatever the reason for the gift, I found it a very enjoyable read and learnt a huge amount from it.
Working in a University it is hard to escape the stereotype of the Boffin or the Know-all. I suppose it is because it is part of the scholarly life that we tend to criticize the work of other academics – mostly with the intention of advancing knowledge – that we run the risk of being thought to be excessively assiduous in correction things we perceive to be incorrect or unclear – in other words, of being pedants – and irritating all kinds of people in the process. This book studies the long history of this sort of behaviour , in as part of the broader history of anti-intellectualism, a story of suspicion and deprecation of expertise that is highly relevant today. We have recently seen a widespread assault on universities, the removal of swathes of information (such as environmental data) from the websites of federal agencies, and the discrediting of the use of vaccines and of scientists engaged in vaccine research. The reader of On Pedantry will discover that this sort of hostility is by no means new.
The word “pedant” as such first appears as such in Renaissance Italy, with pedante being a name for private tutors who were hired by the wealthy to teach their children. Such teachers were of a lower social status than their students, so the word gained a negative connotation, especially when combined with the ostentatious display of knowledge with which these teachers were often associated – the new pedants soon found themselves satirised in sonnets and plays.
But although the word dates from much later, Visser identifies the original pedants in ancient Greece, among the Sophists, who emerged as a group of experts in the Athens of the fifth century BCE, with figures such as Protagoras and Prodicus becoming celebrities thanks to their novel approach to learning: they emphasised argumentation and speech, practices that became closely linked to the emergence of democracy. The Sophists gained a reputation, however, for competitive debate that was more about winning an argument than discovering the truth. The name “Sophist” comes from sophia, the greek word for knowledge, from which we get “Philosophy” but also “sophistry” (the use of clever but false arguments).
The philosopher Plato deplored the pedantic nature of Sophists in several of his dialogues and in his Republic, where they would rather “have a quarrel than a conversation”. The playwright Aristophanes went further, lampooning them in his play The Clouds, perhaps the first satire on intellectuals. In ancient Rome, this mistrust of the intellectual took on another aspect – a disdain the lack of practical use of much of Greek philosophy.
Incidentally, I learnt reading this book that the Emperor Hadrian, keen to demonstrate his own intellectual capacity and his admiration for Greek philosophy, forged the link between learning and social elite status by growing a beard, unusually for high status Romans of his time. Hadrian’s beard became much imitated – as a marker of intellectual capacity – but also lampooned as a sign of pretentiousness.
The next developments mapped out by Visser concern the rise of the scholar – in the middle ages and the Renaissance – whose world centred specifically on the Latin language, its literature and grammar. The learning of teachers and scholars was both celebrated and denigrated. John of Salisbury in the 12th century loathed “academics … poring over every syllable … expressing doubts about everything”. The French philosopher Michel de Montaigne wrote a famous essay On Pedantry, which is well worth reading; this is one of the few references in this book that I’ve actually read! Negative depictions of the intellectual subsequently appeared widely in literature, from Molière to Shakespeare. During the Enlightenment, pedantry was dismissed as a “vice of the mind”, with writers such asDiderot, in the prospectus to his famous Encyclopédie, writing that “he who claims to know everything only shows himself ignorant of the limits of his human mind”.
Closer to modern times, Visser switches his attention to America and the mistrust of scholars there, beginning with Thomas Paine, whose bestselling Common Sense provided a major influence on the American revolution. Paine identified refined language and classical erudition with a colonialist aristocratic mentality. Visser comments that “in a political culture of democratic machismo, politicians denounced colleagues who made an inordinate display of their education as elitist, overly sensitive, and effeminate”, I which is just as true of the 21st Century as the 19th. This American distrust of the expert even created a political party, the “Know Nothings”, in the early 19th century.
The final chapter of the book discusses attitudes towards intellectuals in popular culture, focussing on stereotypical portrayals of professors in Hollywood movies. I think more could have been made about the gendered nature of the pedant – until recently a stricly male stereotype. More recent versions are hardly more enlightened: just as male intellectuals are usually depicted as being “unmanly”, the focus on female academics in the movies is largely on their “mannish” looks.
I also think much more could be made of more recent phenomena, such as the annoying nitpicking of the anonymous internet troll and the rise of “mansplaining”. There’s also the emergence of generative AI. ChatGPT and other chatbots could have emerged as very irritating pedants, but instead they come across as servile and sycophantic, which some of us find even more irritating. And most most modern-day real-life pedants do not hallucinate or generate obvious untruths. Some of us who have been accused of being pedantic are at least trying to get things right, rather than pass off slop as truth.
As you might expect, this book involves many enjoyable digressions and asides. I especially appreciated the discussions of scholarly life and attitudes to education in mediaeval and early modern Europe. What you might not have expected for what is a scholarly work – with footnotes and whatnot – is that it is written in a very light and readable style and is frequently very funny.
This extraordinary planetary nebula in the constellation Draco has captivated astronomers for decades with its elaborate and multilayered structure. Observations with ESA’s Gaia mission place the nebula at a distance of about 4300 light-years.
Planetary nebulae, so-called because of their round shape when viewed through early telescopes, are in fact expanding gas thrown off by stars in their final stages of evolution. It was the Cat’s Eye Nebula itself where this fact was first discovered in 1864 – examining the spectrum of its light reveals the emission from individual molecules that’s characteristic of a gas, distinguishing planetary nebulae from stars and galaxies.
Here, the nebula is showcased through the combined eyes of the NASA/ESA Hubble Space Telescope and ESA’s Euclid, highlighting the remarkable complexity of stellar death.
Though primarily designed to map the distant Universe, Euclid captures the Cat’s Eye Nebula as part of its deep imaging surveys. In Euclid’s wide, near-infrared and visible light view, the arcs and filaments of the nebula’s bright central region are situated within a halo of colourful fragments of gas zooming away from the star.
This ring was ejected from the star at an earlier stage, before the main nebula at the centre formed. The whole nebula stands out against a backdrop teeming with distant galaxies, demonstrating how local astrophysical beauty and the farthest reaches of the cosmos can be seen together in modern astronomical surveys.
Within this broad view of the nebula and its surroundings, Hubble captures the very core of the billowing gas with high-resolution visible-light images, adding extra detail in the centre of this image. The data reveal a tapestry of concentric shells, jets of high-speed gas and dense knots sculpted by shock interactions, features that appear almost surreal in their intricacy. These structures are believed to record episodic mass loss from the dying star at the nebula’s centre, creating a kind of cosmic “fossil record” of its final evolutionary stages.
Combining the focused view of Hubble with Euclid’s deep field observations not only highlights the nebula’s exquisite structure but also places it within the broader context of the Universe that both space telescopes explore. Together, these missions provide a rich and complementary view of NGC 6543 – revealing the delicate interplay between stellar end-of-life processes and the vast surrounding space.
–o–
For more information, see here. There’s also this video which shows the Nebula in context in Euclid’s extraordinarily impressive wide field capability and Hubble’s superb resolution in the optical band:
P.S. I put the following on my office door in Maynooth University to demonstrate the true scale (!) of my own involvement in Euclid.
So Operation Epstein Furore is in full swing, and already US and Israeli forces have scored some notable successes in the indiscriminate slaughter of civilians – the attack on a school in southern Iran that killed over 150 people, many of them children, stands out so far although it is certain that many more Iranian citizens will be similarly “liberated” (i.e. blown to bits). Trump’s plan is obviously to set the Middle East on fire in order to distract attention from his problems at home.
Anyway, I suddenly realized that it is just about two years to the day since I flew back to Dublin from Sydney where I spent a month during my sabbatical. It was actually 3rd March, not 2nd March, that I boarded the plan bound for Abu Dhabi, but one day is neither here not there (especially when you’re jetlagged). It seems that Iran has been firing drones and missiles at airports around the Gulf so there are no flights in the airspace right now:
Screengrab from FlightRadar24
I flew via Etihad, which has suspended commercial flights entirely. Abu Dhabi airport was struck by drones over the weekend, but I don’t think anyone was hurt. I suppose anyone wanting to fly from Sydney to Dublin these days will have to go via Singapore or just stay put. I’ve heard there are around 20,000 Irish people in the Gulf States right now. I hope they stay safe, and the same goes for all civilians caught up in the conflict.
Well, today is St David’s Day so let me first offer a hearty “Dydd Gwŷl Dewi Sant hapus i chi gyd” (Happy St David’s Day to you all). Here is a picture of some daffodils amid the undergrowth in my garden:
Over the years, I seem to have established a tradition of posting a bit of poetry to mark this special day for Wales and the Welsh and given current events I chose this one which I have posted before, about 9 years ago. It was written in Welsh by Hedd Wyn (born Ellis Humphrey Evans) who lived from 1887 to 1917; Hedd Wyn was his bardic name and it translates (roughly) as “pure peace”.
Hedd Wyn was a non-conformist Christian and a pacifist who was conscripted into the British Army to serve in World War 1. He was posted to Flanders and was killed in action on 31st July 1917, the first day of the 3rd Battle of Ypres. He was hit in the stomach by a shell and died later of his wounds. The battle stumbled on for months of horrific slaughter as the planned Allied offensive foundered in the mud of Passchendaele and ended, as had the Battle of the Somme a year earlier, in a bloody stalemate.
A few weeks before his death, Hedd Wyn wrote a poem called Yr Arwr (‘The Hero’) which was submitted for the prestigious Bard’s Chair at that year’s National Eisteddfod. It was announced on 6th September 1917 that he had won the prize, posthumously. The bard not being able to sit in the the chair, it was draped in black cloth. The Prime Minister, David Lloyd George, was present at the ceremony.
The poem Yr Arwr is a very long work, running to 13 pages of manuscript, which is not practicable to post here, but here’s another poem by Hedd Wyn. This is called Rhyfel (‘War’). I only have a few words of Welsh, but because of the occasion, it seems appropriate to post this in its original language. You can find English translations here and on the Wikipedia page here. Translating poetry is always very difficult, but the sense of the poem is of a world in chaos that has been abandoned by God.
Gwae fi fy myw mewn oes mor ddreng
A Duw ar drai ar orwel pell;
O'i ôl mae dyn, yn deyrn a gwreng,
Yn codi ei awdurdod hell.
Pan deimlodd fyned ymaith Dduw
Cyfododd gledd i ladd ei frawd;
Mae swn yr ymladd ar ein clyw,
A'i gysgod ar fythynnod tlawd.
Mae'r hen delynau genid gynt
Ynghrog ar gangau'r helyg draw,
A gwaedd y bechgyn lond y gwynt,
A'u gwaed yn gymysg efo'r glaw.
It’s Saturday once more, so it’s time for another update of activity at the Open Journal of Astrophysics. It has been a busy week. Since the last update we have published a further nine papers, bringing the number in Volume 9 (2026) to 45 and the total so far published by OJAp up to 493.
I will continue to include the posts made on our Mastodon account (on Fediscience) to encourage you to visit it. Mastodon is a really excellent service, and a more than adequate replacement for X/Twitter (which nobody should be using); these announcements also show the DOI for each paper.
The first four papers this week were all published on Monday 23rd February.
New Publication at the Open Journal of Astrophysics: "A Bayesian Exploration of The Mass of the Ursa Major III: Kinematics, Rotation and their influence on the Mass to Light Ratio" by Tim R. Adams (U. Sydney, Australia), Brendon J. Brewer (U. Auckland, New Zealand) and Geraint F. Lewis (Sydney)
The second paper is “The Impact of Baryonic Effects on the Dynamical Masses Inferred Using Satellite Kinematics” by Josephine F.W. Baggen, Frank C. van den Bosch, and Kaustav Mitra (Yale U., USA). This paper, also in the folder Astrophysics of Galaxies, presents a model to assess the impact of stars and gas on satellite kinematics, showing that these baryonic effects can reduce the satellite velocity dispersion and increase inferred central galaxy masses.
The overlay for this one is here:
The official version of the paper can be found on arXiv here and the Fediverse announcement here:
New Publication at the Open Journal of Astrophysics: "The Impact of Baryonic Effects on the Dynamical Masses Inferred Using Satellite Kinematics" by Josephine F.W. Baggen, Frank C. van den Bosch, and Kaustav Mitra (Yale U., USA)
The third paper this week, and the third published on Monday 23rd February, and the third in the folder Astrophysics of Galaxies, is “MEGATRON: Disentangling Physical Processes and Observational Bias in the Multi-Phase ISM of High-Redshift Galaxies” by Nicholas Choustikov (U. Oxford, UK) and 12 others based in UK, USA, France, Korea and Belgium. The study uses MEGATRON simulations to analyze the interstellar medium (ISM) of high-redshift galaxies, finding it denser and less metal-enriched than local galaxies with implications for line ratios as diagnostics
The overlay is here:
The official version can be found on arXiv here and the Fediverse announcement is here:
New Publication at the Open Journal of Astrophysics: "MEGATRON: Disentangling Physical Processes and Observational Bias in the Multi-Phase ISM of High-Redshift Galaxies" by Nicholas Choustikov (U. Oxford, UK) and 12 others based in UK, USA, France, Korea and Belgium
New Publication at the Open Journal of Astrophysics: "Redshift Assessment Infrastructure Layers (RAIL): Rubin-era photometric redshift stress-testing and at-scale production" by the RAIL Team (31 authors) and the Dark Energy Science Collaboration
Moving on to Tuesday 24th February, the fifth paper this week, is “Feedback shaped the galaxy morphological sequence in presence of mergers” by Masafumi Noguchi (Tohoku University, Japan). This article was published in the folder Astrophysics of Galaxies. This study suggests that galaxy morphology, specifically the mass ratios of bulges and disks, is influenced by galaxy mergers and feedback processes from active galactic nuclei and supernovae.
The overlay is here:
The accepted version can be found on arXiv here, and the fediverse announcement is here:
New Publication at the Open Journal of Astrophysics: "Feedback shaped the galaxy morphological sequence in presence of mergers" by Masafumi Noguchi (Tohoku University, Japan)
The sixth paper this week is “HelioSpectrotron 5000: an interactive solar atlas” by Alexander G.M. Pietrow (AIP Potsdam, Germany). This was published on Tuesday 24th February in the folder Solar and Stellar Astrophysics. This describes HelioSpectrotron~5000 (HS5000), which is an interactive solar spectral atlas that allows comparison between high-resolution spectra and ground-based instrument observations, aiding in wavelength calibration and line identification. The software can be found here; I had a play with it yesterday and it’s very easy to use!
The overlay is here:
You can find the officially accepted version on arXiv here and the Mastodon announcement is here:
New Publication at the Open Journal of Astrophysics: "HelioSpectrotron 5000: an interactive solar atlas" by Alexander G.M. Pietrow (AIP Potsdam, Germany)
The seventh paper of this week was published on Thursday 26th February is “The Rise of Ionized Gas Filaments in Early-Type Galaxies” by Ryan Eskenasy (U. Kentucky, USA), Valeria Olivares (Universidad de Santiago de Chile) and Yuanyuan Su (U. Kentucky, USA). This article, in the folder Astrophysics of Galaxies, is an exploration of the formation of multiphase filamentary nebulae in early-type galaxies (ETGs), using VLT-MUSE IFU observations of 126 non-central ETGs, focussing on the hot gas components thereof.
The overlay is here:
The officially accepted version of this paper can be found on the arXiv here and the Mastodon announcement is here:
New Publication at the Open Journal of Astrophysics: "The Rise of Ionized Gas Filaments in Early-Type Galaxies" by Ryan Eskenasy (U. Kentucky, USA), Valeria Olivares (Universidad de Santiago de Chile) and Yuanyuan Su (U. Kentucky, USA)
New Publication at the Open Journal of Astrophysics: "Relationship Between Major Stellar Physical Parameters and Normal Mode Frequencies in Accreting White Dwarf Stars" by Praphull Kumar, Dean M. Townsley and Hunter Anz (U. Alabama, USA)
The ninth, and final, paper for this week is “A Semi-Supervised Learning Method for the Identification of Bad Exposures in Large Imaging Surveys” by Yufeng Luo (U. Wyoming, USA) and 8 others from the DESI Legacy Imaging Surveys Team. This was published on Friday 27th February, i.e yesterday, in the folder Instrumentation and Methods for Astrophysics. The paper describes a machine-learning approach for detecting poor-quality exposures in large astronomical imaging surveys, proving efficient and accurate in identifying problematic exposures.
The overlay is here:
The official version on arXiv can be found here and the Mastodon announcement follows:
New Publication at the Open Journal of Astrophysics: "A Semi-Supervised Learning Method for the Identification of Bad Exposures in Large Imaging Surveys" by Yufeng Luo (U. Wyoming, USA) and 8 others from the DESI Legacy Imaging Surveys Team
And that concludes this week’s update. We have now published 45 papers in two complete months of 2026, on which basis we can estimate about 270 papers in the year. For the record, in the first two months of 2025 we published 21 papers.
P.S. Thank you to the many people who responded to the latest call for editors. I’ve been sending out invitations and getting people onboard as quickly as I can, but I still have a number to get to so please bear with me!
It being a spring-like day, Maynooth University Library Cat took the opportunity to choose a spot away from his usual post so he could loaf in the sunshine.
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