Ryan Begley

DESI's DR2 BAO results are out!! TL;DR... 1/n @desisurvey

@PicturesFoIder @adinalynch

This is spot on

My first lead-author paper is on arxiv today! 🤠 By measuring the O and Fe abundances of star-forming galaxies at z≈3.5, we constrain the stellar + gas-phase mass-metallicity relationships and find our galaxies have ubiquitously supersolar O/Fe ratios! arxiv.org/abs/2405.00774

New paper on the arXiv today - investigating the UV continuum SEDs of galaxy candidates at z > 8. Our main new finding is that at z > 10 the UV continuum looks uniformly `dust-free' . arxiv.org/abs/2311.06209

New paper Day! arxiv.org/abs/2306.03916 We've used VANDELS photometry+spectra to estimate fesc(Lya), confirming a (>10sig) EW(Lya)-fesc(Lya) correlation at z~4-5. From ISM line measurements in composite spectra, we then find fesc(LyC) ~ 0.15 fesc(Lya). Go read for all the details!

Really exciting to see so many programmes targeting early massive quiescent galaxies in JWST Cycle 2! We've been awarded 3 days of NIRSpec time to further my Cycle 1 programme, as well as following up and extending the PRIMER and VANDELS surveys! stsci.edu/jwst/science-e…

There's (almost) nothing better on this earth than polishing a fancy matplotlib figure while listening to nice music and having a good (Belgian) beer or cappuccino. Can't share the current one yet, so here are some past ones that I like, just because. (arxiv links in alt-text.)

Our luminosity function paper has been updated using new NIRCam zero-points! We re-reduced the images using the new calibrations and made further custom corrections. We find that this does not change the overall conclusions of the paper.

@TheHyyyype @CdonnanAstro .. 🤔

guy who's addicted to lunch: [biting into a sandwich at 8:30 am] hey, it's 12 pm somewhere

The Big Bang Theory is not unraveling. #scicomm

Tell me you don’t understand science while telling me you don’t understand science. Not Cornell’s, Nottingham’s. Not a challenge to Big Bang cosmology. “Panic” is followed by “at the disc” oh, did the joke sail over the head?

@jps_astro Here is the SCUBA-2 beam size plotted on the JWST imaging. Anyone want to place bets on the (possible, 2.6 sigma) submm source?

A sneak preview of tomorrow's arXiv. There are WAY more quiescent galaxies at z > 3 than we thought!

It's us! bbc.co.uk/news/science-e… @CdonnanAstro @sophmjewell @claraluciep @ryanbegley96 @FergusLPCullen @MassiHamadouche @astro_bowler @bo_milvang

🚨 My new paper is out today! We search for z>8 galaxies in the 3 deep JWST fields and in UVISTA DR5 to determine the UV luminosity function up to z=15. We find 39 galaxies in the JWST fields with excitingly a potential candidate z=16.7. arxiv.org/abs/2207.12356 1/6

z=16.7 candidate on arXiv this eve from 🏴󠁧󠁢󠁳󠁣󠁴󠁿 by @CdonnanAstro @ACCarnall @ryanbegley96 @FergusLPCullen @MassiHamadouche & friends: arxiv.org/abs/2207.12356

Redshift 13 is so last week @CdonnanAstro @ryanbegley96 @FergusLPCullen @MassiHamadouche

The James Webb Space Telescope “is really going to define a new generation of astronomers and a new generation of science as a whole.” sciencenews.org/article/james-…