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Tim Davis

@timdavisastro.bsky.social

223 followers 146 following 10 posts

Extragalactic Astronomer and Reader at Cardiff University (he/him). 🇬🇧🇱🇺🇪🇺

Posts Replies Media

Reposted by Tim Davis

Prof Chris Jackson @seismatters.bsky.social · 06/10/2023

✉️ Some science 🧪 buddies and I have written an open letter to the UK government, strongly opposing their “kicking woke ideology out of science” sentiments, which stand to damage the UK’s scientific standing and ability to deliver for public good. Please read and consider signing ✍🏻 t.co/H7rNzb0wGh

t.co

Letter to Secretary of State re EDI in science

Online survey BOS

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Reposted by Tim Davis

Jonathan McDowell @planet4589.bsky.social · 23/08/2023

Post-landing image from Chandrayaan-3, from the official ISRO birdsite account.

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Tim Davis @timdavisastro.bsky.social · 23/08/2023

You can catch me live on TalkTV in ~15 minutes providing some live comment on the landing attempt by Chandrayaan-3.

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Tim Davis @timdavisastro.bsky.social · 21/08/2023

🔭 Are you on the postdoc job market? Interested in star formation in nearby galaxies with JWST? Apply for this postdoc with my wonderful colleague Dr Ana Duarte Cabral! Deadline 15th Sept. Two years (+possibility of extension) tinyurl.com/2vyaryxa

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CosmicRami 🏳️‍🌈🏳️‍⚧️ @rami.spaceaustralia.com · 09/08/2023

Wow! 16 pro-amateur astrophotographers imaged the Whirlpool Galaxy, then combined their data to produce an image with 255 hours integration time. This is the result. 🧪🔭 Credits and results in here: www.astrobin.com/7hwtz0/?fbclid=IwA…

a large, spiral galaxy in the centre of the image, with wispy and diffuse nebulosity surrounding it and trailing off to the lower right. In the background are many stars of different colours, and a narrow cigar-shaped galaxy in the distance.

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Tim Davis @timdavisastro.bsky.social · 04/08/2023

Recently group member Ilaria Ruffa had an exciting new paper hit the arXiv. We find the existence of a 3D plane connecting the masses of supermassive black holes to their nuclear millimetre and X-ray luminosities, in our sample of AGN! Check it out here arxiv.org/abs/2307.13872

A graph showing the mm-luminosities and X-ray luminosities of our sample galaxies, with the results of classical torus models and ADAF models overplotted. The torus models underpredict the mm luminosity of our sources by >2 orders of magnitude, while the ADAF grid explains them much better

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Tim Davis @timdavisastro.bsky.social · 01/08/2023

Exciting news today, as my institution has finally allowed me to learn to read, after years of only (seniorly) lecturing. Looking forward to tackling my to-read pile now!

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Reposted by Tim Davis

Mike Boylan-Kolchin @mbkplus.bsky.social · 26/07/2023

Great summary figure from Crain & van de Voort (2023) review of hydrodynamic simulations showing length scales from stellar interiors to the size of the Universe, along with regimes where baryonic physics can be treated explicitly versus approximately in simulations. 🧪🔭https://tinyurl.com/y3shhxft

Figure 2 from Crain & van de Voort 2023. Caption:
Schematic illustration of the extreme dynamic range of the length scales of the physical processes influencing the formation and evolution of galaxies. Cosmological, hydrodynamical simulations are able to follow cosmic structure formation up to O(100 Mpc) scales but have to resort to subgrid models on small scales. Future simulations of the galaxy population will push both of these boundaries, increasing their dynamic range, but the need for subgrid models will remain for years to come.

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Tim Davis @timdavisastro.bsky.social · 27/07/2023

How do you do a thread here? Or do you just have to post each, and reply to yourself?

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Reposted by Tim Davis

Emily Hunt @emily.space · 25/07/2023

Psst... new skeeters... do you like astronomy? Then you should check out the astronomy feed!

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Tim Davis @timdavisastro.bsky.social · 21/07/2023

Made the leap over. Thanks, @spacedramber.bsky.social for the invite!

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