Archive for November, 2023

Connections and Submissions

Posted in Biographical, Open Access on November 30, 2023 by telescoper

If I have one gripe to make about the otherwise excellent train service between Barcelona and Paris (and back) , it’s that the Wi-Fi connection was very unreliable and at times unusable. That mean that I couldn’t do some of the fairly complicated things I needed to do online because of frequent disconnections. The upside of being disconnected is that I have a good excuse for not attending telecons!

I did manage to publish one paper at the Open Journal of Astrophysics yesterday, because I did the necessary before leaving my hotel in Paris. Unfortunately, I had to wait until I got back to Barcelona to check that everything had been correctly registered with Crossref. Only then could I promote the paper on social media. I’ll probably do a post here tomorrow about it.

These connectivity problems yesterday resulted in me spending most of my first day back in Barcelona catching up with such things as writing Google Docs and editing things via Overleaf but mainly dealing with new OJAp submissions.

There have been three four new submissions today alone, adding to the little backlog that developed over the short periods I was offline. These days we’re getting an average of one paper per day so if I can’t afford to miss many days as then it is difficult to catch up.

The two talks I gave while I was away were both about Open Access publishing in general, and the Open Journal of Astrophysics in particular, but I don’t think today’s little surge in submissions is a direct consequence of me touting for trade as I don’t think any of the authors concerned attended either talk even virtually.

It’s gratifying to see the number of submissions steadily increasing. I am sometimes frustrated – as I’m sure the authors are – by the slowness of the refereeing process but at least that’s no different from other journals I suppose.

Anyway, that’s enough reflections. Hopefully I’ll be able to spend this evening and tomorrow doing some writing of my own. Apart from tomorrow afternoon, when I’ll have yet another telecon…

Return to Barcelona

Posted in Uncategorized on November 29, 2023 by telescoper

So here I am, packed and ready to travel across Paris to Gare De Lyon for the train back to Barcelona. It’s rather cold in Paris this morning, about 2°C in fact.

It’s quite a long trip, back the way I came  without the stopover in Montpellier, but I have a window seat and plenty of things to do, so it shouldn’t be too bad.

Au revoir, Paris!

Update: I arrived exactly on time in Barcelona after a pleasantly uneventful journey back. It’s almost 15° warmer in Barcelona than in grey Paris! Now I need to stretch my legs and do some shopping!

To Saclay

Posted in Biographical, Open Access, Talks and Reviews with tags , on November 28, 2023 by telescoper

I am up early this morning ahead of a trip to Saclay, best known for CEA Saclay and the relatively new Paris-Saclay University, which involves an approximately 30-minute trip on an RER to Le Guichet, followed by road transport. It’s anomalous that Saclay itself is not served by either train or Metro, though I am told there are plans.

The only significant annoyance about yesterday’s journey was that the WIFI was hopeless, so I had to catch up with a lot of things last night and have more to do today. Still, my talk is this morning so I should have plenty time this afternoon and evening before heading back to Barcelona tomorrow.

Here are the slides I used for my talk, which was virtually identical to the one given at Montpellier last week.

Update: It has been a long day. I’m now back in the hotel in Port-Royal. The new Paris-Saclay campus is very impressive. The IPhT is a bit older and of a different style but is a nice working environment. Thanks to everyone there for their hospitality and especially for the splendid lunch after my talk!

Tour de France – Deuxième Étape

Posted in Biographical with tags , on November 26, 2023 by telescoper

So here I am, then, in my room in Montpellier, about to have breakfast and then to depart for the train to Paris. Hopefully, I’ll get to my hotel there in time for the three consecutive hours of Zoom calls I have scheduled for this evening. I’ll be spending tomorrow at the Institut de Physique Théorique in Saclay, which will require a combination of trains and buses, but for today I just have to get the TGV from Montpellier Saint-Roch to Paris Gare De Lyon and an RER train from there to my hotel. What could possibly go wrong?

Thank you to everyone in Montpellier for their hospitality during this short visit. Au revoir!

Update: On my way on time. Momentary panic as I tried to embark because the OUIGO app refused to display my ticket so I couldn’t find out which seat I was supposed to sit in, but it worked eventually. This train isn’t as fancy as the one I got from Barcelona and is rather full but nevertheless comfortable enough.

Update to the Update: arrived in a very grey and misty Paris on schedule and managed to find my way to the hotel and even managed the whole check-in experience in French! Now I have three hours of telecons to complete before thinking about dinner…

Art at the Musée Fabre 

Posted in Art, History with tags , , , on November 26, 2023 by telescoper

I spent several hours today wandering around the excellent Musée Fabre; for a little flavour of the place, see the little video I took in one of the rooms here. The largest part of the collection is French art, particularly from the 16th to 19th century, although there are also quite a few rooms dedicated to “northern” paintings, principally of Flemish origin. The gallery was founded by François-Xavier Fabre (1766-1837) who was born and died in Montpellier but spent most of his productive life as an artist in Italy (especially Florence). Fabre gave most of his own paintings to start the gallery, and there are many of examples of his work here, but many of his contemporaries are represented too, as well as earlier French artists such as Nicolas Poussin, and later ones such as Henri Matisse. Among the non-French artists are Peter-Paul Rubens, Joshua Reynolds and Thomas Wright of Derby, to name but a few.

The permanent collection is accompanied by an exhibition of modern art by Pierre Soulages, who passed away last year, and who specialized in sombre abstracts which make quite a contrast with the permanent collection.

Anyway, here is a gallery of random pictures I took. If you click on the image it will tell you who the artist was: the one by Soulages is obvious; the very fine bronze sculpture is Le Coureur (1955) by Germaine Richier, an retrospective of her work finished earlier this month (as you can see from the banner in the first picture). Check out the little boy in the very sepulchral scene depicting a vigil for the dead, who is looking at the viewer as if to say “What are you doing here?”

Musée Fabre, Montpellier

Posted in Art with tags , on November 26, 2023 by telescoper

Random Shots of Montpellier

Posted in Biographical, History with tags , , , , on November 25, 2023 by telescoper

Having a few hours to spare this morning, I took a walk around Montpellier in the sunshine. I can tell you that the layout of the old part of the city, which hasn’t changed since mediaeval times, is a labyrinth in which it is very easy to get lost but if you’re not going anywhere in particular it’s fun wandering around. At night it’s very atmospheric too. Anyway, here are some random pics I took on the way. As you can see, the weather was lovely and you always get interesting shadows from the winter sun…

While I am on the blog, I thought I would mention one of Montpellier’s famous historical connections, Michel de Nostredame (1503-1566), more usually known as Nostradamus, who studied medicine at the University here for a while before he was expelled. I searched the Prophecies of Nostradamus which you can find online, and found no reference to my visit to Montpellier. Incidentally, the University of Montpellier was founded in 1220 so is one of the oldest universities in the world. La Tour de la Babotte was part of the fortifications of the old city and was later used for a time as an astronomical observatory.

P.S. the oldest remains in Montpellier are medieval. The Romans never settled here; the main settlement in the area was Maguelone, on the coast. The administrative centre of the region was moved to Montpellier, which is 10km inland, to avoid raids from pirates.

Hubble Tension Reviewed

Posted in The Universe and Stuff with tags , , on November 24, 2023 by telescoper

Just a quick post to pass on a reference to a paper on arXiv (to appear in Annual Reviews of Astronomy and Astrophysics) about the ongoing saga of the Hubble Tension. The authors are Licia Verde, Nils Schöneberg, and Héctor Gil-Marín, three members of the ICCUB which is hosting me during my sabbatical. I saw an earlier draft of this paper but didn’t want to blog about it before the final version appeared. The abstract (which I’ve slightly reformatted) reads:

The Hubble parameter H0, is not a univocally-defined quantity: it relates redshifts to distances in the near Universe, but is also a key parameter of the ΛCDM standard cosmological model. As such, H0 affects several physical processes at different cosmic epochs, and multiple observables. We have counted more than a dozen H0‘s which are expected to agree if a) there are no significant systematics in the data and their interpretation and b) the adopted cosmological model is correct. With few exceptions (proverbially confirming the rule) these determinations do not agree at high statistical significance; their values cluster around two camps: the low (68 km/s/Mpc) and high (73 km/s/Mpc) camp. It appears to be a matter of anchors: the shape of the Universe expansion history agrees with the model, it is the normalizations that disagree. Beyond systematics in the data/analysis, if the model is incorrect there are only two viable ways to “fix” it: by changing the early time (z≳1100) physics and thus the early time normalization, or by a global modification, possibly touching the model’s fundamental assumptions (e.g., homogeneity, isotropy, gravity). None of these three options has the consensus of the community. The research community has been actively looking for deviations from ΛCDM for two decades; the one we might have found makes us wish we could put the genie back in the bottle.

arXiv:2311.13305


You can read the full paper here to learn about the scientific arguments, but I’d like to draw attention to this excerpt which is of more general relevance and with which I agree wholeheartedly:

It is also fair to say that the developments of the last decade have changed the expectations and modus operandi of a big part of the community. The community now expects results to be reproducible, hence the data and key software to be publicly available in such a way that a practitioner not involved in the original analysis could still retrace and reproduce all important steps and findings. While research areas such as the CMB and large-scale structure made this transition to “open science” about two decades ago, this was not the case for other areas of extra-galactic astronomy, but this is now changing.

arXiv:2311.13305

Université de Montpellier

Posted in Biographical with tags , on November 24, 2023 by telescoper
The University of Montpellier is full of 1970s buildings but also has lots of trees behind which to hide them..

Tour de France – Première Étape

Posted in Barcelona, Biographical with tags , on November 22, 2023 by telescoper
First Leg

I’m up reasonably early this morning to embark on the first leg of a visit to France. My first stop is at Montpellier on the French Riviera, where I’m giving a talk this afternoon at the Laboratoire Univers et Particules de Montpellier (LUPM) and will be staying for a few days before heading North to Paris and then back South again to Barcelona next week.

I’m looking forward to the trip as all three legs are on TGVs, which I’m told are comfortable, and I’ll hopefully get some nice views on the way. I’ve actually been to Montpellier before, to be on the jury for a PhD examination, but that was a long time ago and I don’t remember it very well.

Update: the travel went smoothly. It was a bit of an adventure getting the tram from Montpellier Saint-Roch railway station to the campus, and a bit more of an adventure navigating the building sites on the way to the seminar venue, but I got there in time and the talk went well. Now I have to find my hotel and then it will be necessary to consume alcoholic beverages.