Archive for October, 2023

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New Views of the Orion Nebula

Posted in The Universe and Stuff with tags , , on October 3, 2023 by telescoper

The Orion Nebula, a stellar nursery about 400 pc away from Earth, is a much-studied object that has yielded considerable insights into the processes of star formation. If you thought that there wasn’t much more to be learned about this object, though, you’d be very wrong. A set of JWST images has been released by the European Space Agency and they are amazing. You can see them all here, but here’s a taster in the form of a detail from one of the pictures. The following image is entitled “Explosion fingers from the BN-KL region in Orion” but to me it looks like demons rising up from the Underworld, like in the last act of Don Giovanni…

Here’s the blurb:

This cutout from the new NASA/ESA/CSA James Webb Space Telescope short-wavelength infrared image of the Orion Nebula shows bright ‘fingers’ of gas racing away from an explosion that occurred roughly 500 to 1000 years ago in the heart of a dense molecular cloud behind the nebula, perhaps as two young massive stars collided. The dense cloud is called Orion Molecular Cloud 1 and lies to the northwest of the visible Trapezium stars in Orion.

The fingers are predominantly red, indicating emission from molecular hydrogen gas that has been shocked by the immense energy pouring out from the explosion site. Near the tips of some of the fingers, the emission turns green due to hot iron gas and even white in some cases where the gas is at its hottest. Further down, the fingers seem mostly turbulent, but in some places, the flow appears laminar.

The Orion Nebula lies roughly 1300 light-years from Earth in the so-called ‘sword’ of the constellation of Orion the Hunter, and the image shows a region that is 4 by 2.75 light-years in size.

Image description: The image shows a series of red fingers of shocked molecular gas expanding from the bottom of the image towards the top and top right. Each of the fingers comprises a series of bright arcs of emission like bow waves, expanding behind tips, the latter often appearing green. There are many stars spread across the image with the characteristic eight spikes due to diffraction in the optics of Webb, and there is a foreground haze of wisp blue clouds due to the Orion Nebula, which lies in front of the fingers.

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Nobel Prize for Physics Speculation

Posted in Science Politics, The Universe and Stuff with tags , on October 2, 2023 by telescoper

Just  to mention that tomorrow morning (Tuesday, October 3rd 2023) will see the announcement of this year’s Nobel Prize for Physics. I must remember to make sure my mobile phone is fully charged so I can be easily reached.

Of course this is just one of the announcements. This morning, for example, there is the announcement of the Prize for Physiology or Medicine, and on Wednesday is the Prize for Chemistry: both of these sometimes go to physicists too. You can find links to all the announcements here.

I do, of course, already have a Nobel Prize Medal of my own already, dating from 2006, when I was lucky enough to attend the prize-giving ceremony and banquet.

I was, however, a guest of the Nobel Foundation rather than a prizewinner, so my medal is made of chocolate rather than gold. I think after 17 years the chocolate is now inedible, but it serves as a souvenir of a very nice weekend in Stockholm!

Regular readers of this blog, Sid and Doris Bonkers, may recall that I called it correctly last year when Alain Aspect, John F. Clauser and Anton Zeilinger won. I had however predicted them every year for many years until they won, and they won’t win it again, so I can’t follow my usual strategy. I’ll suggest that there’s an outside chance for Michael Berry and Yakir Aharonov for their work on the geometric phase, although if they were going to win they probably would have done so by now. Feel free to make your predictions through the comments box below.

To find out you’ll have to wait for the announcement, around about 10.45 (UK/Irish time) tomorrow morning. I’ll update this post when the wavefunction has collapsed.

UPDATE: The 2023 Nobel Prize for Physics goes to:

Pierre Agostini
The Ohio State University, Columbus, USA

Ferenc Krausz
Max Planck Institute of Quantum Optics, Garching and Ludwig-Maximilians-Universität München, Germany

Anne L’Huillier
Lund University, Sweden

“for experimental methods that generate attosecond pulses of light for the study of electron dynamics in matter”

Congratulations to them! The full press release containing the citation can be found here.

Anyway, for the record, I’ll reiterate my opinion that while the Nobel Prize is flawed in many ways, particularly because it no longer really reflects how physics research is done, it does at least have the effect of getting people talking about physics. Surely that at least is a good thing?

P.S. My own claim for the 2023 Physics Nobel Prize is based on the discovery of the Coles Law.

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The Week in Barcelona

Posted in Barcelona, Biographical on October 1, 2023 by telescoper
The Arc de Triomf which can be loosely translated as “Arc de Triomphe”…

I was doing another tour of Barcelona today in the blazing sunshine, when it suddenly struck me that (a) I’ve been here for a week already and (b) it’s October! It certainly doesn’t feel like a normal October with not a cloud in the sky and the temperature at 27°C.

The tourist crowds were out in force. I always find it quite interesting listening for different languages as I go around. There are a few British and American, and of course Spanish, but the language I’ve come across most often among the tourists is French. That’s not surprising, of course, given the proximity to the border and, e.g., train services to and from France.

A bit of advice for people visiting. Many of the interesting locations (museums and art galleries, for example) are very busy and one can’t just turn up, buy a ticket and go in without a very long wait. The best way to do it is to buy a ticket online with a specific time on it, then you can bypass the queues and go straight in at the appointed hour.

The main that to have struck me while I’ve been here is that the cost of living is so much lower than Ireland. The grocery stores and supermarkets are stocked with a huge range of fresh food at prices much lower than back home. The choice of good quality wines for less than €10 per bottle is astonishing.

Eating in restaurants – even in the touristic areas – is generally inexpensive (although there are of course expensive places). In the area I am living in, every street corner seems to have a place where you can get something to eat and/or drink. I’ve sampled a few in my neighbourhood, and most have been very good indeed. There are, of course, some that aren’t so good.

Actually, I’m eating rather a lot less these days. I have a hearty breakfast but usually skip lunch and often only have a light snack or tapas in the evening. I think the temperature has reduced by appetite (at least for food….). That’s not bad, actually, because I could do with losing a bit of weight.

I’m still in my (very pleasant) hotel but will be moving to an apartment later next week, assuming nothing goes wrong with the contract.

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