If you want to spend some quality time with #Euclid data, you can use "ESA Sky", which allows everyone to browse public data, pan, zoom, and look around. All in full colour galore, and full resolution:

Euclid Deep Field South: https://sky.esa.int/esasky/?hide_welcome=true&hide_banner_info=true&hips=DES-DR2+ColorIRG&sci=false&layout=esasky&euclid_image=EDFS

Euclid Deep Field North: https://sky.esa.int/esasky/?hide_welcome=true&hide_banner_info=true&hips=PanSTARRS+DR1+color+(i%2C+r%2C+g)&sci=false&layout=esasky&euclid_image=EDFN

Euclid Deep Field Fornax: https://sky.esa.int/esasky/?target=53%20-28&hips=Q1-EDFF-R4-PNG-RGB&fov=14.999999999999998&projection=TAN&cooframe=J2000&sci=false&lang=en&layout=esasky&euclid_image=EDFF

#astronomy #space #ESA

It's #Euclid data release day!

#ESA and the Euclid Consortium are making 63 deg² of Wide Survey data available to the world. Imaging and spectroscopy data, catalogues and masks for 20+ million galaxies, quasars, stars and substellar objects.

This "Q1" data release is aimed both at the community to sharpen their tools for the 30x larger DR1 expected in late 2026, as well as to enable a first set of science projects across cosmic time.

Q1 is accompanied by the presentation of 7 Euclid Consortium data release publications, and an initial batch of 27 science papers.

Read more in the Consortium press release: https://www.euclid-ec.org/public/press-releases/euclid-quick-data-release-1/

And the ESA release webstory: https://www.esa.int/Science_Exploration/Space_Science/Euclid/Euclid_opens_data_treasure_trove_offers_glimpse_of_deep_fields

#astronomy #science #space

Cosmology Results from DESI

Do the latest observations cast doubt on the standard model? I'd say no. We're seeing an evolutionary change from "We have no idea what the dark energy is but we think it might be a cosmological constant" to "We still have no idea what the dark energy is but we think it might not be a cosmological constant".

http://telescoper.blog/2025/03/20/cosmology-results-from-desi/

Exciting! Our paper [https://arxiv.org/abs/2404.01876] on getting the nucleation rate for strong phase transitions from simulations has been accepted (with several improvements and fixes thanks to the referees and others): https://journals.aps.org/prd/accepted/fb077QeaFd1Ecd15e19a34d6b0afe890a9352f5a1

Congratulations to my collaborators, doctoral researcher Anna Kormu and Dorothy Hodgkin Fellow Oliver Gould in Nottingham. 🎉

Basically we found that analytical methods (meaning in practice perturbation theory techniques) are still not great at predicting the nucleation rate, even in a regime where they should be pretty accurate. Which is a bit weird, and also important for things like baryogenesis and gravitational wave signatures.

If I ever have the time and energy I’ll do a longer post about it 😅

#physics #cosmology