I thought I’d share the conference photograph from last week’s annual Euclid Consortium Meeting in Rome, along with a big “Thank You” to the organizers (both LOC and SOC). It’s a huge amount of work to organise a meeting of over 600 people. Although I was only there for a couple of days, I thought it went very well.
Next year’s meeting will be in Leiden in March so I probably won’t be able to attend because of teaching. But guess where it will be in 2026? Barcelona!
Until I can get my laptop fixed and/or get a new one, my ability to write blog posts is a bit limited. At least there is a sizeable collection of things to share, including a steady supply of new videos from the Euclid Consortium like this one:
What I thought would be a straightforward trip back from Rome to Barcelona turned into nothing of the sort.
I arrived at Roma Termini station and got on a train for Fiumicino Airport. The train didn’t move, however, and eventually we passengers were told that we should get off and take a bus or a taxi because of “a problem on the line” which would take an indefinite time to fix.
I went to see if I could get a bus, but the queue was predictably enormous. Same story for taxis. After waiting over an hour I had all but given up hope of catching my flight when suddenly it was announced that the track problem was fixed and I got back on the train. It reached the airport in good time and I passed a very long queue of people waiting to travel in the opposite direction; trains into Roma Termini from Fiumicino had also been cancelled:
I still thought I would miss the flight, but I thought that once in the airport I could perhaps book another. Helped by the fact that I had already checked in online and only had hand luggage, however, I made it through security and to the gate just in time to board.
So, all seemed well. I’ve travelled enough in Italy to have learnt how to cope with a fair amount of chaos.
I got back to Barcelona – which is somewhat cooler than Rome – just about on time and took the Aerobus as usual. Unfortunately, I had forgotten that today was the day that roads in the area around my flat were closed for a Formula 1 “Road Show”. The bus stopped at the edge of the sealed off area and passengers – many heavily laden with luggage – were left to make their way through the dense crowds. Whoever decided it was a good idea to block some of the busiest roads in Barcelona during the evening rush hour has a lot of questions to answer. The crush around Plaza de Catalunya was absurd and potentially dangerous, and not only for people like me who find such situations very difficult.
When I eventually got to my flat, I saw a protest against this stupid event had let to standoff in the street with some sinister-looking cops.
At home, and after a relaxing shower, I thought the day’s tribulations were over until I switched on my laptop and found it wouldn’t start:
Automatic Repair didn’t work so I logged a ticket with Maynooth IT Services. If they can’t fix it, it looks like I’ll be unable to work until I get a new machine…
…and blogging using my phone like this!
Among the various items of Euclid Merch in the goody bag given to attendees at the annual Euclid Consortium Meeting in Rome are a nice bag, a cap, a notebook, and a mystery object:
Can anyone suggest what this item does?
(Wrong answers preferred.)
This morning, I took a short (~ 90 minute) flight from the pleasantly warm (23°C) Barcelona to the swelteringly hot (31°C) city of Rome. It’s actually forecast to be 39°C on Thursday and 40°C on Friday. Fortunately, I’m not staying that long!
The occasion for this trip is the annual Euclid Consortium Meeting, which is being held at the Università degli Studi di Roma “La Sapienza“. The main sessions are in the splendid Aula Maxima thereof, with its imposing mural:
I’m giving a talk there in the first plenary session tomorrow…
Update: here’s me giving my plenary talk:
I’m travelling back to Barcelona today, later than planned because I’ve had a heavy cold that I struggled to shake off and didn’t want to infect fellow passengers on the flight. While I’m in transit I thought I’d share some updates about the European Space Agency’s Euclid mission.
The first thing to share is a piece by Knud Jahnke with news about Euclid’s issue with ice in the optical system. The latest intervention has led to an improvement, but since it is a closed system ice will probably form again – though perhaps not in the same place – and further procedures will probably be necessary in future. In the meantime, though, the survey resumes.
Now for some short videos -three, to be precise – about the Early Release Observations mentioned here. I posted another one in this series here. I think the titles are self-explanatory:
And if that isn’t enough, for those of you who like simulations here is another video about the Euclid Flagship simulation described in this paper.
I have a busy day in front of me here in Not-Barcelona so I thought I’d do a quick post sharing a video about the Euclid Early Release Observations (EROs) that came out last week. The press materials accompanying the release of the EROs and the science paper relating to this work, mention “freely floating planets”, but that doesn’t make sense in terms of the modern definition of a planet so here they are described as sub-stellar objects. The paper describing this work can be found on the arXiv here.
As it’s Friday afternoon I thought I would share one of the little videos I mentioned in the previous post. It’s only just over a minute long but it is worth listening to, not least for the dulcet tones of Henry Joy McCracken as he explains the science.
The Euclid preprint related to this work can be found here.
This morning’s arXiv update brought the expected deluge of preprints from Euclid. You can find details of all fifteen of the new articles here. Ten of them relate to the Early Release Observations of which five were announced yesterday and five last November. These are essentially byproducts of the testing and calibration phase of the Euclid mission rather than the main cosmological survey. ESA is making a series of short videos about these results which I will share on here from time to time.
Of more direct relevance to cosmologists such as myself are the following five reference papers:
The overview paper, led by Yannick Mellier (Euclid Consortium Lead), giving a general description of the mission capabilities and science goals, will be the main reference paper and just about every active member of the Euclid Consortium is on the author list (including myself). That’s over a thousand people, not quite at the level of the Large Hadron Collider but getting there. I do think we need to find a better way of giving credit to work in large collaborations than through authorship, but until someone comes up with a workable scheme, and people responsible for hiring researchers adopt it, we’re stuck with what we’ve got. At least I can say that I’ve read that paper (which is 94 pages long, including the author list)
Papers II-IV are technical articles relating to Euclid’s instruments and their calibration, which will also be important references for the survey part of the Euclid mission. Paper V is about the Flagship simulations and the mock catalogues produced therefrom; I discussed these a while ago here. It is led by Francisco Castander of Institut de Ciencies de l’Espai, who organized the meeting I attended recently here in Barcelona.
These papers now now be peer-reviewed and, assuming they are accepted, published in a special issue of Astronomy & Astrophysics (A&A).
As it was foretold, exciting new results from the European Space Agency’s Euclid mission have now been released.
You can read more about these images here.
Together with the five images released last November that makes a total of ten Early Release Observations from the pre-survey phase of Euclid. It’s not all about the pictures, however. Today also saw the release of ten scientific papers to go with these images, as well as five reference papers for the main survey. You can find them all, with accompanying information here. They will be announced on arXiv tomorrow.
You might also be interested to read my Euclid piece on RTÉ Brainstorm which has just appeared. This is not just about the new images, but gives an update on what Euclid has been up to since launch, and what we can expect in the future. There’s also a version adapted for Maynooth University PR purposes here. It includes this quote:
Today’s release of new data and technical papers from Euclid is exciting in itself but also marks the start, after months of painstaking calibration and testing of the instruments, of Euclid’s main cosmological survey. We are on the threshold of a new era in cosmology. Maynooth is the only University in Ireland to be involved in this mission and it is very exciting to be at the forefront of such an important scientific development.
I’m also quoted in a piece in the Irish Times. You’ll probably find the article blocked by a paywall but my bit is:
In the Dark 