New Publication at the Open Journal of Astrophysics

Posted in OJAp Papers, Open Access, The Universe and Stuff with tags , , , , , , on September 28, 2021 by telescoper

Time to announce another publication in the Open Journal of Astrophysics. This one is the eleventh paper in Volume 4 (2021) and the 42nd in all.

The latest publication is entitled Squeezing the Axion – it’s about inflationary scalar field perturbations using the squeezed state formalism – and is by

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

You can click on the image to make it larger should you wish to do so. You can find the arXiv version of the paper here. This one is also in the folder marked Cosmology and Non-Galactic Astrophysics.  

P.S. I hope to publish another paper tomorrow…

Astrophysics & Cosmology Masterclass at Maynooth!

Posted in Biographical, Education, Maynooth, The Universe and Stuff with tags , , on September 28, 2021 by telescoper

Regular readers of the blog – both of them – may remember that, after a couple of postponements due to Covid-19,  we presented a Masterclass in Astrophysics & Cosmology in Maynooth on March 25th 2021. Well, owing to popular demand we’ve decided to do a re-run of the event on Friday 12th November 2021 ahead of next year’s CAO cycle.

This will be a half-day virtual event via Zoom. It’s meant for school students in their 5th or 6th year of the Irish system. There might be a few of them or their teachers who see this blog so I thought I’d share the news here. You can find more information, including instructions on how to book a place, here.

Here is the updated official poster and the programme:

I’ll be talking about cosmology early on, while John Regan will talk about black holes. After the coffee break one of our PhD students will talk about why they wanted to study astrophysics. Then I’ll say something about our degree programmes for those students who might be interested in studying astrophysics and/or cosmology as part of a science course. We’ll finish with questions either about the science or the study!

(And at 12 noon I don’t turn into a pumpkin but do have to run off to give a lecture on vector calculus..)

Welcome to the First Year

Posted in Education, Maynooth, The Universe and Stuff with tags , , , on September 27, 2021 by telescoper

Well this morning I had my first lecture to the new first-year students on their first day of teaching at Maynooth University. It went fairly well, and my improvised attempts to record the lecture for the students were reasonably successful too.

When I started at about 11.05am I was a little disappointed that I only had around two-thirds of the number I expected, but I assumed that was that students had difficulty locating the venue, Physics Hall. Not unreasonably quite a few new students assume that this is in the Science Building on the North Campus where the Physics staff are based. In fact Physics Hall is on the much more scenic South Campus, which is quite a distance from the Science Building which usually means that some newbies arrive late as a result of going to the wrong venue.

Incidentally, here is a view of Physics Hall from the front taken in 2012 at a Mathematics Lecture by Tim Gowers. The hall hasn’t changed much since then!

I like this room because (a) it has good blackboards at the front and (b) although a reasonable size there is not a huge distance from the lecturer to the back of the audience so everyone can see and hear the lecturer, and can be heard by the lecturer if they ask something.

Anyway, the first lecture was very introductory so late students weren’t going to miss anything earth-shattering, and in any case I was recording it, so I started on time. After talking for over half an hour someone – a theoretical physics PhD student – came in to the hall and explained that about half the class had been standing outside thinking I hadn’t turned up because the door was closed. Why they didn’t try the handle and have a look inside I don’t know! When the latecomers had all filed in and found a seat I had roughly the number I had initially expected so all was well. I explained to them that they shouldn’t stand on ceremony next time.

It did occur to me that this year’s new students have a pretty good reason for not knowing where anything is on campus is that for many of them today is the first day they’ve ever been herein Maynooth. Open days last year were all virtual, for example. It must feel very strange to commit to a four-year degree at a University you’ve never even visited before, but that’s what this cohort of students have been forced to do.

One of the things I tend to do in the first lecture is to explain that I do like to have interaction in my lectures and it was nice to find that quite a few people did answer when I asked questions. Lectures are so dull if it’s just an old fart blathering on for 50 minutes. The capacity of Physics Hall is about 90, which is not huge, but interaction is possible in much bigger rooms if you work to create the right atmosphere.

Giving students the encouragement to get involved is also helpful to the lecturer, as students will then be more willing to point out errors on the blackboard (which, of course, I put in deliberately to see if they’re paying attention). After today I have a pretty good feeling about this new class and I’m looking forward to seeing them for Lecture 2 tomorrow.

Oh, and the instruction that masks are mandatory in lectures was observed impeccably by the students.

Back to the First Year

Posted in Education, Maynooth, The Universe and Stuff on September 26, 2021 by telescoper

It’s a rainy Sunday evening and I’ve spent most of the day sorting out material for my first year module on Mechanics and Special Relativity. I’m looking forward to teaching a full class again. I like a big room and I particular like Physics Hall. The first lecture will be very introductory. I’ll be introducing the students to this character who appears a number of times in the Lecture Notes in various settings:

I’ll also be explaining how the subject of Mechanics began in the 17th Century when Sir Isaac Newton fell out of a tree and landed on an apple. Newton was of course building on previous work by Galileo and his colleagues Figaro and Magnifico, including the famous experiment in which he dropped a cannonball off a tower onto a pizza.

I’ve been looking through the enrolment figures for this year which look quite encouraging. The number of first-year students taking my module is up about 38% on last year, though last year was down on the year before. The other good news is that the number of new students on Theoretical Physics & Mathematics (who do not take the module I mentioned above) is more than double last year’s intake and higher than it has been in living memory. All this would be even better news if it weren’t for the workload issues arising from our being so short-staffed. I was hoping that we’d emerge from the pandemic in a better shape than we are now, having to rely on three one-year temporary lecturers (one of whom still hasn’t arrived in Ireland).

Talking of the pandemic, there’s no clear evidence yet of an increase in Covid-19 cases associated with a return to third-level education.

Our returning students in Maynooth started last week but other colleges in Ireland began earlier. I don’t know whether we can expect an upturn in infections resulting from this, but whether or not it will eventually happen I think it’s too early to see it just now. I remember last year when we started on-campus lectures only to switch abruptly to online teaching. I hope that doesn’t happen again. But it might.

Two Sugars

Posted in Jazz with tags , , , , , , , on September 25, 2021 by telescoper

The song Sugar (That Sugar Baby Of Mine) was written by Maceo Pinkard, Edna Alexander and Sidney Mitchell way back in the 1920s and quickly became a jazz standard played in various ways by various musicians. To illustrate its versatility as a vehicle for improvisers here are two very different versions that are favourites of mine that I’ve had reason to remember recently.

In 1980 I bought an album by the extraordinarily underrated Scottish Jazz singer Jeanie Lambe with the Danny Moss Quartet when it first came out. The British tenor saxophonist Danny Moss was married to Jeanie Lambe from 1964 until his death in 2008. Jeanie passed away last year at the age of 79. Many versions of Sugar are slow and slushy but this a straight-ahead swinging take on it, played at a jaunty tempo, with a fine solo by Danny Moss in the middle.

The second version is totally different. It was performed by the Newport All-Stars at a midnight concert in Paris in 1961. The band was led by pianist George Wein who passed away on 13th September. As well as being a musician in his own right, George Wein owned and ran the famous Storyville club in Boston during the late 40s and early 50s but was perhaps most famous for being behind the annual Newport Jazz Festival, which began in 1954 and is still going to this day. It was quite usual at these festivals to have an all-star band playing in support of various solo artists, which is why Jack Teagarden and Buck Clayton turned up playing behind Chuck Berry at the 1958 Festival. George Wein also persuaded Thelonious Monk to allow Pee Wee Russell to sit in with his Quartet on clarinet for a set – I have the record of that gig and it’s every bit as strange and wonderful as you might imagine!

An eccentric character who struggled with alcoholism, Pee Wee Russell (real name Charles Ellsworth Russell) was somewhat unreliable as a musician but although he was frequently wayward he had a unique voice and, when he was on good form, a beautifully lyrical way of playing with a really original approach to harmony. It might surprise you to know that Sidney Bechet was a big fan of Pee Wee as – no less surprisingly – was Benny Goodman. The great Coleman Hawkins said of Pee Wee in 1961:

For thirty years, I’ve been listening to him play those funny notes. I used to think they were wrong, but they weren’t. He’s always been way out, but they didn’t have a name for it then.

I’ve always been drawn to very original musicians like Pee Wee Russell; the sort that when you hear just one note you recognize immediately who it is. It’s not all about technique. Pee Wee had soul. Messrs Bechet, Goodman and Hawkins et al knew that for all his technical deficiencies he was the genuine article, a complete original.

I’ve always felt that one should judge musicians by their best playing rather than their worst and, on that night in Paris, Pee Wee produced this achingly beautiful and hauntingly tender rendition of Sugar, played as a slow ballad. He’s introduced on this track by George Wein who aptly described him as “The Poet of the Clarinet”. You can of course listen to the track and decide for yourself, but I think this is gorgeous.

A Return of the Three-day Week in Britain?

Posted in Covid-19, History, Politics with tags , , on September 25, 2021 by telescoper

Back in 2014, on the 40th anniversary of the start of the Three-Day Week in Britain, I wrote this:

I wonder how many of you are old enough to remember the “Three Day Week”? I am. In fact I remember sitting my 11+ examination right in the middle of the period (from January to March 1974) in which electricity supplies across the UK were restricted to three days per week. Although it meant reading books by candlelight, it wasn’t as bad as it may sound to younger readers because we didn’t have that many electrical gadgets in those days and at least our house was heated by coal, not electricity. I dread to think what would happen nowadays if we should experience  problems with fuel supplied similar to those caused by the Oil Crisis of 1974. But such an event is not altogether impossible…

In the Dark, 4th January 2014

Not impossible at all given recent news. It seems even the Daily Torygraph agrees. Moreover, a senior Conservative politician has described such talk as “alarmist and misguided“, which convinces me that it is indeed likely to happen. My social media feeds are filled with pictures of queues of cars caused by people panic-buying petrol. Makes a change from toilet roll I suppose…

There is a concern here in the civilized world that problems with supply chains caused by Brexit may impact Ireland. Though there is no sign of this yet, it is of course possible, but only if people here continue to disrespect UK sovereignty by insisting on buying British products. The message must get through that the UK simply does not want the trade surplus it has enjoyed with Ireland for many years so it would be impolite to let it persist. Fortunately the shops are now displaying a much wider range of European products so this should not be a problem. I find it easy to manage using predominantly local Irish suppliers, apart from wine and some speciality products which are mainly imported from EU countries.

P.S. There’s an article in the Newcastle Evening Chronicle about the original Three-Day Week, which brought back a lot of memories. I remember the newspapers had lists of which areas would lose electricity at what time : candles and paraffin lamps suddenly became fashionable; and of course we had quite a few days off school!

Popping up on Campus

Posted in Covid-19, Education, Maynooth with tags , , on September 24, 2021 by telescoper

Well that’s the end of Week 1 of the new regime (or Week 0 for new students). Apart from quite a few timetabling issues and a staff short shortage it hasn’t gone too badly. I also heard today that next week there will be a “pop-up vaccination centre” on Maynooth University campus.

I think this is a good idea.

Talking of things popping up on campus, I think Maynooth University Library Cat has been enjoying the attention he’s been getting from returning staff and students. In fact his little abode is now an official calling point on the Campus Tours for new students.

Being petted and pampered can be exhausting however and occasionally he likes to withdraw to his quarters for a rest..

Anyway, it’s been a hectic week and the new students arrive tomorrow so now it’s definitely long past wine o’clock…

Vera Rubin Observatory Update

Posted in The Universe and Stuff with tags , , on September 23, 2021 by telescoper

I couldn’t resist sharing this video showing the state of play with the Vera Rubin Observatory, currently under construction on Cerro Pachón in Chile. This is a huge survey telescope with an 8.4m mirror and enormous camera to match, the main task for which will be a ten-year Legacy Survey of Space and Time (LSST) which has the same initials as the former name of the telescope (the Large Synoptic Survey Telescope). That’s obviously so they carry on using the LSST name for their website and elsewhere.

Anyway, the mount assembly has now been installed and tested (in both altitude and azimuth) so you can now get good idea of what the telescope will look like when it’s completed. It’s an amazing piece of engineering, particularly when you see such a huge piece of kit so finely balanced that it can be moved by hand…

New Publication at the Open Journal of Astrophysics

Posted in OJAp Papers, Open Access, The Universe and Stuff with tags , , , , , , on September 23, 2021 by telescoper

Time to announce another publication in the Open Journal of Astrophysics. This one is the tenth paper in Volume 4 (2021) and the 41st in all. We actually published this one a couple of days ago but I’ve been so busy with start-of-term shenanigans that I didn’t get time to announce it until this morning.

The latest publication is entitled Consequences of constant elevation scans for instrumental systematics in Cosmic Microwave Background Experiments. The authors are Daniel B. Thomas & Nialh McCallum of Queen Mary, University of London, and Michael Brown of the University of Manchester.

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

You can click on the image to make it larger should you wish to do so. You can find the arXiv version of the paper here. This one is also in the folder marked Instrumentation and Methods for Astrophysics, though it is obviously of relevance to Cosmology and Non-Galactic Astrophysics too.

The Autumnal Equinox 2021

Posted in Biographical, Maynooth, The Universe and Stuff with tags , , on September 22, 2021 by telescoper

So here we are then. The Autumnal Equinox (in the Northern hemisphere) takes place this evening (Wednesday 22nd September)  at 20.21 Irish Time (19.21 UT).

Although  the term `equinox’  refers to a situation in which day and night are of equal length, which implies that it’s a day rather than a specific time, the astronomical equinox is more accurately defined by a specific event, i.e. when the plane defined by Earth’s equator passes through the centre of the Sun’s disk (or, if you prefer, when the centre of the Sun passes through the plane defined by Earth’s equator). Day and night are not necessarily exactly equal on the equinox, but they’re the closest they get. From now on days in the Northern hemisphere will be shorter than nights and they’ll get shorter still until the Winter Solstice.

Many people take the autumnal equinox to be the end of summer. There is a saying around these parts, however, that `Summer is Summer to Michaelmas Day’ (September 29th), which is not until next week. I must say, though,  though it doesn’t feel very summery today.

Anyway, this is Welcome Week in Maynooth and, barring any sudden changes of plan, we’re due to start teaching first year students on Monday 27th September. Returning students commenced on Monday 20th. I gave my first lecture on Vector Calculus yesterday. That was the first in-person lecture I’ve done for over a year. It was strange because I taught the same students online last year, but obviously never actually saw or heard them, as students generally mute their video and sound when attending lectures. Today was an improvement on that but everyone in the class was wearing a mask so I still haven’t really seen them! At lest this means that all the students were observing the necessary protocol, which is a relief, and the masks didn’t interfere with them responding to questions of mine or asking questions of their own.

We are still one lecturer short as the visa office in Dublin has been sitting on the application from our new member of staff since June 23rd. On top of my own things to do I’ve been setting up lectures for him so the students can view them in the lecture hall remotely. I’m not sure how long that will go on for, although it’s out of my hands.

Other than that I’ve spent the last couple of days trying to iron out problems with the timetable – of which there are unfortunately many – as well as preparing my own lectures. I want to record my lectures from the classrooms but unfortunately the University has chosen not to install decent video equipment so I’ve had to improvise. I recorded yesterday’s lecture using a webcam attached to the stand for my tenor saxophone. It seemed to work out reasonably well.