Archive for Alex Gough

Flying Visit(s)

Posted in Biographical, Education, The Universe and Stuff with tags , , , , , , , on June 2, 2024 by telescoper

So here I am, not in Barcelona. On Thursday night I flew to the fine city of Newcastle upon Tyne to act as external examiner for a PhD candidate. Since I knew I would be arriving quite late I stayed in a hotel near Newcastle Airport. It was just as well I did so because, it being Ryanair, I arrived even later than expected. On Friday morning I took the Metro from the Airport to Haymarket and spent the morning in the School of Mathematics, Statistics and Physics at Newcastle University ahead of the viva voce examination.

The PhD candidate was Alex Gough (pictured right, after the examination, with supervisor Cora Uhlemann). Cora being German we were treated to the tradition of successful PhD candidates having to wear a elaborate hat, after the examination (fortunately not during it). Some champagne was consumed, followed by dinner at a nice Indian restaurant on Clayton Street.

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

There aren’t many rules for how a viva voce examination should be conducted or how long it should last, but the can be as short as, say, 2 hours and can be as long as 5 hours or more. The examiners usually ask a mixture of questions, some about the details of the work presented and some about the general background. The unpredictable content of a viva voce examination makes it very difficult to prepare for, and it can be difficult and stressful for the candidate (as well as just tiring, as it can drag on for a long time). However, call me old-fashioned but I think if you’re going to get to call youself Doctor of Philosophy you should expect to have to work for it. Some might disagree.

Obviously I can’t give details of what went on in the examination except that it was quite long primarily because the thesis was very interesting and gave us lots to discuss. At the end internal examiner Danielle Leonard and I agreed to recommend the award of a PhD. In Newcastle as in other UK universities, the examiners simply make a recommendation to a higher authority (e.g. Board of Graduate Studies) to formally award the degree, but they almost always endorse the recommendation. I’ve never been sure exactly when a successful candidate is allowed to call themselves “Doctor”, actually, but congratulations to Dr Gough!

Anyway, the celebratory dinner ended just after Women’s International football match between England and France (which France won) had finished at St James’ Park and the Metro was consequently crammed full, but I got back to the hotel at a reasonable hour. Thank you to everyone in the group, especially Cora and Ian Moss, for being so friendly and making me feel so welcome during this brief visit.

Tomorrow I shall be heading to the part of not-Barcelona known as Oxford, where I believe there is a University of some sort, to give a lecture about which I’ll post more tomorrow.

Making (Dark Matter) Waves: Untangling Wave Interference in Multi-Streaming CDM

Posted in Open Access, The Universe and Stuff with tags , , , , on September 13, 2022 by telescoper

A couple of days ago I announced the publication of a new paper in the Open Journal of Astrophysics called Making (dark matter) waves: Untangling wave interference for multi-streaming dark matter by Alex Gough and Cora Uhlemann. I forgot on that occasion to mention that there is a video of a talk by the first author in the series Cosmology at Home, so I’m remedying that now by posting the video here. Enjoy!

New Publication at the Open Journal of Astrophysics

Posted in OJAp Papers, Open Access, The Universe and Stuff with tags , , , , , , on September 11, 2022 by telescoper

It’s time once again for me to announce another new paper at the Open Journal of Astrophysics. The new paper, published last week, is the 13th paper in Volume 5 (2022) and the 61st in all. The latest publication is entitled “Making (dark matter) waves: Untangling wave interference for multi-streaming dark matter” and the authors are Alex Gough and Cora Uhlemann (both of Newcastle University). The paper is another one for the folder marked Cosmology and Non-Galactic Astrophysics.

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 accepted version of the paper on the arXiv here.

This is a paper that’s close to one of my current research interests. I think it’s really excellent and I am very happy the authors chose to publish it in the Open Journal of Astrophysics.

As a bonus here is a groovy animated version of Figure 1 from the paper showing the development of a multi-stream region.

And if that weren’t enough here is a short talk about their work in the Cosmology From Home series by the first author Alex Gough.