The Reinvention of Science

Posted in History, Literature, The Universe and Stuff with tags , , , , , on January 28, 2024 by telescoper

I’ve known about the existence of this new book for quite a long time – the first two of the authors are former collaborators of mine and I’m still in fairly regular touch with them – but I only received a copy a few weeks ago. Had I been less busy when it was in proof stage I might have been in a position to add to the many generous comments on the back cover from such luminaries as Martin Rees, Jim Peebles, Alan Heavens and, my hosts in Barcelona, Licia Verde and Raúl Jiménez. Anyway, now that I’ve read it I’m happy to endorse their enthusiastic comments and to give the book a plug on this blog.

One can summarize The Reinvention of Science as a journey through the history of science from ancient times to modern, signposted by mistakes, fallacies and dogma that have hindered rather than facilitated progress. These are, in other words, not so much milestones as stumbling blocks. Examples include the luminiferous aether and phlogiston to name but two. These and many other case studies are used to illustrate, for example, how supposedly rational scientists sometimes hold very irrational beliefs and act accordingly on them. The book presents a view of the evolution of science in spite of the suppression of heterodox ideas and the desire of establishment thinkers to maintain the status quo.

The volume covers a vast territory, not limited to astrophysics and cosmology (in which fields the authors specialize). It is a very well-written and enjoyable read that is strong on accuracy as well as being accessible and pedagogical. I congratulate the authors on a really excellent book.

P.S. I am of course sufficiently vain that I looked in the index before reading the book to see if I got a mention and was delighted to see my name listed not once but twice. The first time is in connection with the coverage of the BICEP2 controversy on this very blog, e.g. here. I am pleased because I did feel I was sticking my head above the parapet at the time, but was subsequently vindicated. The second mention is to do with this article which the authors describe as “beautiful”. And I didn’t even pay them! I’m truly flattered.

The Body in the Bellaghy Bog

Posted in History, Poetry with tags , , , , , , , , on January 27, 2024 by telescoper

There was an interesting news item last week concerning the discovery of human remains in a peat bog in Bellaghy, County Derry. Radio-carbon dating has established that these remains are about 2,000 years old, so this was a person who lived in the Iron Age; a post-mortem has revealed it to be a teenage boy of around 15 years old. No cause of death has yet been established, but it is generally thought that these bog bodies were people who were executed as a punishment, or perhaps sacrificed for some ritual purpose.

These are neither the oldest nor the best-preserved such remains to be found in Ireland; the oldest belong to Cashel Man, who died, about 4,000 years ago, in the early Bronze Age. Nevertheless, the anaerobic conditions of the bog have slowed decomposition so much that not only bones, but some skin, hair and even parts of internal organs survive. This find is therefore important, not least because it should be possible to obtain detailed information about the DNA of this individual. Understanding of Ireland’s prehistoric past has been upended in recent years by DNA discoveries. What will Bellaghy Boy tell us? And how many more bog bodies are waiting to be found?

Another fascinating aspect of this story is that the location of the remains is very close to the house where the poet Seamus Heaney lived. Heaney wrote a number of poems about bog bodies and it’s ironic that there was one waiting to be found so close to his home.

Anyway, this gives me an excuse to post a vaguely relevant poem by Heaney called Bogland which, appropriately for the title of this blog, comes from a collection called Door into the Dark.

Three New Publications at the Open Journal of Astrophysics

Posted in OJAp Papers, Open Access, The Universe and Stuff with tags , , , , , , , , , on January 27, 2024 by telescoper

Once again it’s a good time for a roundup of the week’s business at the  Open Journal of Astrophysics. This past week we have once again published three papers, taking  the count in Volume 7 (2024) up to 7 and the total published by OJAp up to 122. Looking at the current work flow I expect there to be at least three next week too.

In chronological order, the three papers published this week, with their overlays, are as follows. You can click on the images of the overlays to make them larger should you wish to do so.

First one up is “The extraordinary frequency pattern variation in δ Scuti stars” by  Luis A. Balona of the South African Astronomical Observatory in Cape Town, South Africa. This paper, published on 22nd  January 2024, is a study of the (lack of) correlation in the structure of periodograms in Transiting Exoplanet Survey Satellite (TESS) data relating to a oscillating delta Scuti variable stars. This paper is in the category of Solar and Stelllar Astrophysics.

Here is a screen grab of the overlay, which includes the abstract:

 

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

The second paper to announce is “The Millions of Optical-Radio/X-ray Associations (MORX) Catalogue, v2” by Eric Wim Flesch, an independent researcher based in New Zealand.  This presents the MORX catalogue of optical/radio/X-ray/ galaxy associations, containing over three million objects. The catalogue itself can be found in a number of locations on the web, e.g. here or here.

The paper was also published on 23rdJanuary 2024 in the category Astrophysics of Galaxies . You can see the overlay here:

 

 

The accepted version of this paper can be found on the arXiv here.

The last paper of this batch is  entitled “The runaway velocity of the white dwarf companion in the double detonation scenario of supernovae” and the authors are Jessica Braudo and Noam Soker of Technion, Haifa, in Israel.  This paper, which presents a study of ejection velocities in the double-detonation scenario of Type 1a Supernovae was published on 24th January 2024 and is in the folder marked High-Energy Astrophysical Phenomena.

Here is the overlay:

 

 

You can find the full text for this one on the arXiv here.

And that concludes the update.  As you can see, we’re getting a bit more diverse in terms of subject matter, which is nice. There’ll be more next week!

 

A Strange Dream

Posted in Biographical with tags , , on January 26, 2024 by telescoper

From time to time on this blog I’ve written about dreams that I’ve had (e.g. here and here). I find dreams rather fascinating but most times when I wake up I don’t remember enough about them to write coherently about. This week, though, I’ve been troubled by a dream I had a few days ago the memory of which has stayed in my brain.

For background, I have had a bit of a cold recently. It’s been nothing serious but has disturbed my sleep a bit and I have dreamt more than usual. One dream, of which I remember only a small part, involved my house being invaded by giant tortoises. Bizarre as that sounds, The Invasion of the Giant Tortoises, didn’t bother me as much as the one I will try to describe now…

In this dream I am at an academic conference of some sort. I am recognized by other people there, attend some talks in lecture theatres, socialize at coffee breaks, join a social dinner, and even go on an excursion by coach with other attendees through a beautiful landscape of mountains, forests and castles.

Nothing particularly weird about that, I suppose. The strange thing is that everywhere I go at this event I have a companion in the form of a young man who is blind. This boy is about twenty to twenty-five years old, with light blond hair, shorter than me, well built and pleasant-looking. His eyes are partly closed and permanently cast to one side. I don’t know his name.

I arrive at the conference with this boy’s arm linked through mine. I sit next to him at talks, sometimes whispering a description of what’s shown on the slides. I get him coffee. When we go to another lecture room we go arm in arm. During the excursion I sit next to him and describe what I can see. He smiles and nods in response. I notice other people looking at us with somewhat patronizing expressions.

Eventually, as dreams do, this all dissolves into some other sequence which I don’t remember. That’s it.

So why do I find this apparently rather innocuous dream so troubling?

The first reason is the identity of the young man. Although I would recognize him if I saw him, as far as I can recall, his face is not one that I’ve ever seen before. Perhaps he is someone I knew a long time ago, or perhaps my subconscious has created a fictional character! His age suggests he might be a student. I have taught blind students before, but I remember them all and he doesn’t resemble any of them. The last time I had a blind student in my class was at Sussex, and I did walk around with him sometimes holding my right arm, e.g. when there were tricky stairs, and was happy to be helpful in that way, but he looked nothing like the boy in the dreams.

More disturbing (to me) than the identity of my sightless companion, however, is what on Earth this dream actually means? Why do I have this boy with me all the time? What does his presence signify? Is it some sort of reference to my sexuality? Nothing at all obviously sexual happens in the dream, by the way, in case you were wondering. I really have no idea how to interpret this!

At this risk of eliciting some strange responses, anyone who has any ideas is welcome to suggest them through the comments box!

UPDATE: An old friend emailed me to say give his interpretation: that a cute blond boy would have to be blind to want to go out with me. Thank you for that.

LISA adopted by ESA

Posted in Science Politics, The Universe and Stuff with tags , , , , on January 25, 2024 by telescoper

I have some good news for gravitational-wave physicists to pass on. The European Space Agency (ESA) has formally “adopted” the Laser Interferometric Space Experiment (LISA) – a gravitational wave experiment in space. This follows the detection of gravitational waves using the ground-based experiment Advanced LIGO and the success of a space-based technology demonstrator mission called Lisa Pathfinder. LISA was actually selected as a potential mission in 2017 – see here – but “adoption” means that the mission concept and technology required are now both sufficiently advanced that it can proceed in 2025, once contractors are found to actually build it.

LISA consists of a flotilla of three spacecraft in orbit around the Sun forming the arms of an interferometer with baselines of the order of 2.5 million kilometres, much longer than the ~1km arms of Advanced LIGO. These larger dimensions make LISA much more sensitive to long-period signals. Each of the LISA spacecraft contains two telescopes, two lasers and two test masses, arranged in two optical assemblies pointed at the other two spacecraft. This forms Michelson-like interferometers, each centred on one of the spacecraft, with the platinum-gold test masses defining the ends of the arms.

Here’s an artist’s impression of LISA:

This is excellent news for the gravitational waves community, especially since LISA was threatened with the chop when NASA pulled out in 2011. Space experiments are huge projects – and LISA is more complicated than most – so it will take some time before it actually happens. The first I heard of the LISA concept was back in the mid-1990s and at the moment LISA is pencilled in for launch in 2035, so it will be forty years in the development.

Ireland is a full member of ESA so let’s hope the Irish Government finds a way of funding participation in the LISA mission. Although Ireland joined ESA nearly fifty years ago, and is paying  into the mandatory science programme which includes LISA (and, for example, Euclid), there is no funding programme in Ireland dedicated to the scientific exploitation of ESA projects. Let’s hope the Irish scientists involved in LISA – including those at Maynooth – are able to play a full part in this exciting project.

Mathematical Mystics at Maynooth

Posted in History, mathematics, Maynooth with tags , , , on January 25, 2024 by telescoper

I’m indebted to my colleague David Malone for sending me this small excerpt from an old issue of the Kalendarium of St Patrick’s College, Maynooth, dating back to the 1960s, which deals with the appointments of new members of staff

Halfway down you will see a reference to Mathematical Mystics!

This is obviously a mistake. It should of course be Mathematical Psychics Physics. I also think the name of the Mathematical Mystics lecturer should be Tigran Tchrakian. I think these are both transcription errors from somebody’s very bad handwriting! The current Department of Theoretical Physics at Maynooth was formerly known by the title Mathematical Physics.

There are some other points of interest. in Experimental Physics you will find mention of a young Susan Lawlor who is now better known as Susan McKenna-Lawlor, a very eminent astrophysicist who specialized in space instrumentation, now in her eighties.

I’m also amused by the existence of a lecturer in Elocution

The historical background of St Patrick’s College is that it was primarily a Catholic theological institution (founded in 1795) although it taught secular courses and was a recognized college of the National University of Ireland from 1910. It was only in the mid-1960s that it was opened to lay students, which expanded the numbers considerably. In 1997 that the secular part separated and formed NUI Maynooth (now known by the marketing people as Maynooth University). The remaining theological institution is known as St Patrick’s Pontifical University (or St Patrick’s College or just Maynooth College).

A major role for St Patrick’s College was the training of priests and I suppose it was important that priests should be well spoken, hence the lectures on elocution…

Near the top in connection with Sociology you can see the title An tAth which is the Irish language way of writing the abbreviation “Fr” for “Father”, indicating a priest; “father” is athair and the an is a definite article. Note the lower case t in front of Ath which is an example of prothesis.

Finally, right at the top of the page you can see the name Donal Linehan, which will be familiar to Irish rugby fans but I don’t know if there’s a family connection between the former Ireland intentional who is now a TV commentator and the lecturer in Roman and Civil Law.

R.I.P. Arno Penzias (1933-2024)

Posted in History, R.I.P., The Universe and Stuff with tags , , , on January 24, 2024 by telescoper

Yesterday I heard the sad news of the death, at the age of 90, of American physicist and radio astronomer Arno Penzias.

I’ve used the above image hundreds of times in popular talks. It shows Robert W. Wilson (left) and Arno A. Penzias (right) standing in front of the famous horn antenna that (accidentally) discovered what we now know to be the cosmic microwave background, radiation left over after the Big Bang.

Penzias and Wilson made their historic measurements in 1964, published their results in 1965, and received the Nobel Prize for Physics in 1978. At the time of this experiment, the scientists were working at Bell Telephone Laboratories at Holmdel, New Jersey, on Project Echo. The antenna was built to receive radio signals bounced off a passive satellite in a low Earth orbit to check the feasibility of satellite radio communication. They found excess noise in their receiver, which was eventually identified as a relic of a time when the Universe was extremely hot. Coincidentally, the theory of this yet undiscovered radiation was being worked on by Bob Dicke and his group in Princeton at about the same time (and also in New Jersey). Discussions ensued, and the discovery paper by Penzias & Wilson appeared in the Astrophysical Journal in 1965 beside a paper by Dicke et al. giving the theoretical interpretation.

The discovery of the cosmic microwave background was probably the most important result in observational cosmology after that of the Hubble expansion and it paved the way for the establishment and further development of the Big Bang theory. One of the two discoverers of the CMB has now left us, leaving a priceless legacy.

Rest in peace, Arno Allan Penzias (1933-2024)

Prophet Song by Paul Lynch

Posted in Literature, Maynooth with tags , , , on January 23, 2024 by telescoper

My ongoing quest to keep up with the literature brings me to the winner of the 2023 Booker Prize, Prophet Song by Paul Lynch. Before writing a few comments on this extraordinary work I should mention the Maynooth connection: the book was written during the writer’s tenure as Writer-in-Residence at Maynooth University which involves teaching creativity and novel-writing, on the MA in Creative Writing, which is now in its second year.

So to the book, which is a grimly compelling novel set in an alternative Ireland after a far-right takeover revolving around Eilish Stack and her family. Her husband, Larry, a trade unionist, is detained by the state police and her efforts to find him get tangled up in the disintegration of society into civil war during which she tries desperately to keep herself and her family together as anarchy descends. We learn little of what goes on in the wider world, except what Eilish herself sees and rumours she picks up from others, but eventually, her home engulfed by the fighting, she is forced to attempt to flee with what remains of her family and cruelly exploited by human traffickers.

I won’t give away any details, but the story is bleak and at times is truly harrowing. I had to stop reading at one point – when Eilish visits a military hospital in the penultimate chapter, for those of you who have read it.

I have to admit that it took me a while to get the hang of Lynch’s writing style, with no conventional division into paragraphs and minimal punctuation. For example, speech is not included in quotation marks but embedded into the often very long sentences that blur the distinction between Eilish’s inner thoughts and the outer reality. Once I got used to it, however, I found it gripping despite the relentless horror of Eilish’s situation: Lynch conjures up an atmosphere of dread and hopelessness as effectively as George Orwell does in Nineteen Eighty-Four, with which this book has been rightly compared, but the prose also seems to me to be heavily influenced by James Joyce.

This is not an easy read, but is an important novel that should be read. I don’t think it will be long before it is on the syllabus for Leaving Certificate English.

I’ll just make further comment. Many of the reviews I have read of this book describe it as an “alternative future” and a warning about the rise of the fascism, but that’s only a part of the story. To me, it’s not really an alternative future, but an alternative present. The point is all the horrors described in this book – the murders, the abductions, the torture, the indiscriminate slaughter of innocent civilians, the people trafficking are actually happening right now elsewhere in the world, but those of us living in safer places can view them from a safe distance or, more likely, just ignore them. The novel’s power is that it makes such things happen on the familiar streets of Dublin, making the unthinkable an alternative reality.

You have to wait until near the very end of the book for Paul Lynch to explain the title, which he says far more eloquently, essentially what I said in the preceding paragraph.

…and the prophet sings not of the end of the world but of what has been done and what will be done and what is being done to some but not others, that the world is always ending over and over again in one place but not another and that the end of the world is always a local event, it comes to your country and visits your town and knocks on the door of your house and becomes to others but some distant warning, a brief report on the news, an echo of events that has passed into folklore…

Paul Lynch, Prophet Song

The tale ends with a crowd of refugees – Eilish and her young children among them – getting into small boats to attempt to reach safety across the sea. Frail as it is, that’s their only hope of survival and a better life…

Spring School on Topological Aspects of Low-dimensional Quantum Physics at Maynooth!

Posted in Maynooth, The Universe and Stuff with tags , , on January 23, 2024 by telescoper

I’ve been asked by colleagues not in Barcelona to use the medium of this blog to advertise the fact that Maynooth University is hosting an exciting spring school for Early Career Researchers this April:

Registration is now open!

For further information and to register see here. Please forward to anyone who might be interested!

Storm on the Island – Seamus Heaney

Posted in Poetry with tags , , , on January 22, 2024 by telescoper

We are prepared: we build our houses squat,
Sink walls in rock and roof them with good slate.
This wizened earth has never troubled us
With hay, so, as you see, there are no stacks
Or stooks that can be lost. Nor are there trees
Which might prove company when it blows full
Blast: you know what I mean – leaves and branches
Can raise a tragic chorus in a gale
So that you listen to the thing you fear
Forgetting that it pummels your house too.
But there are no trees, no natural shelter.
You might think that the sea is company,
Exploding comfortably down on the cliffs
But no: when it begins, the flung spray hits
The very windows, spits like a tame cat
Turned savage. We just sit tight while wind dives
And strafes invisibly. Space is a salvo,
We are bombarded with the empty air.
Strange, it is a huge nothing that we fear.

by Seamus Heaney (1939-2013)

Storm Isha passed overnight, bringing down many trees and leaving many thousands of households without power.