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Ryan Begley

0000-0003-0629-8074
astro-ph.GAastro-ph.SRastro-ph.COastro-ph.EPastro-ph.HEastro-ph.IMdigital healthpaediatricsremote careremote diagnostics

On Valency

published · living versions
W_gcmbzx94·v1 · currentpublished
On the importance of medium-resolution continuum spectroscopy for JWST's extragalactic legacy
with Adam C. Carnall, Ho-Hin Leung, Struan D. Stevenson, Elizabeth Taylor +79
1 version
W_unu28bt7·v1published
Why a Multi-Cycle Treasury Program is Essential to Maximize JWST's Scientific Contributions to Galaxy Formation
W_vjn46yac·v1published
Black Hole Seeds and Little Red Dots: Connecting Formation and Growth with a JWST Multi-Cycle Treasury Program
W_29ahe9fu·v1published
The cold substellar frontier in JWST Extragalactic surveys: a robust parallax measurement yields the most distant known ultra-cold Y dwarf

Preprints & journals

45 papers in the corpus · 2021–2026
JWST CAPERS: Spectroscopic evaluation of very high redshift galaxy candidates2610.12322v1 · Callum T. Donnan, Mark Dickinson, Lorenzo Napolitano et al.2026 · 0 citationsarXiv
Constraining reionization-era Lyα\alpha escape with JELS-MUSE: a highly complete Hα\alpha-selected sample at z∼6.1z\sim6.12609.02558v1 · A. L. Patrick, K. J. Duncan, Z. Li et al.2026 · 0 citationsarXiv
The gradual decline of Lyα\alpha visibility in the CANDELS fields: evidence for the combined effects of galaxy evolution and reionization2609.00199v1 · L. Napolitano, L. Pentericci, A. Ferrara et al.2026 · 0 citationsarXiv
Early Exploration of the Scientific Discovery Space for the Habitable Worlds Observatory2608.11294v1 · Courtney D. Dressing, Danica Adams, Evelyne Alecian et al.2026 · 0 citationsarXiv
A clear detection of proper motion confirms that the claimed z≃32\mathbf{z\simeq32} galaxy candidate, "Capotauro'', is a Y-type brown dwarf2608.07461v1 · F.-Y. F. Liu, D. J. McLeod, B. J. Sutlieff et al.2026 · 0 citationsarXiv
Unprecedented Constraints on Gas Flows at High Redshift Using Deep JWST/NIRSpec Observations from the LyC22, EXCELS, and AURORA Surveys2606.12686v1 · Emily Kehoe, Alice E. Shapley, Adam C. Carnall et al.2026 · 0 citationsarXiv
A search for the first galaxies across >0.6>0.6 deg2^2 of JWST imaging: new evidence for a rapid decline in star-formation activity at z>12z>122604.16666v1 · D. J. McLeod, J. S. Dunlop, R. J. McLure et al.2026 · 0 citationsarXiv
The JWST EXCELS survey: The ages and abundances of 3<z<53<z<5 massive quiescent galaxies show that downsizing was already in place by z≃4z\simeq42602.05934v2 · Ho-Hin Leung, Adam C. Carnall, Elizabeth Taylor et al.2026 · 1 citationarXiv
Spectroscopic confirmation of a large and luminous galaxy with weak emission lines at z=13.53\mathbf{z = 13.53}2601.11515v2 · Callum T. Donnan, Derek J. McLeod, Ross J. McLure et al.2026 · 2 citationsarXiv
The JWST EXCELS survey: Outflows in 1.5 < z < 5 quiescent and recently quenched galaxies are likely relics from episodic AGN activity2601.02269v2 · Elizabeth Taylor, Adam C. Carnall, David Maltby et al.2026 · 2 citationsarXiv
The JWST EXCELS Survey: gas-phase metallicity evolution at 2 < z < 82511.00705v2 · T. M. Stanton, F. Cullen, A. C. Carnall et al.2025 · 6 citationsarXiv
Extreme equivalent width-selected low-mass starbursts at z=4−9z=4-9: insights into their role in cosmic reionization2510.25647v2 · M. Llerena, L. Pentericci, R. Amor'in et al.2025 · 1 citationarXiv
The JWST EXCELS Survey: A spectroscopic investigation of the ionizing properties of star-forming galaxies at 1<z<82509.26591v2 · R. Begley, R. J. McLure, F. Cullen et al.2025 · 5 citationsMon Not R Astron Soc (2025)
The JWST EXCELS survey: Insights into the nature of quenching at cosmic noon2509.18278v2 · Maya Skarbinski, Kate Rowlands, Katherine Alatalo et al.2025 · 3 citationsarXiv
PRIMER & JADES reveal an abundance of massive quiescent galaxies at 2 < z < 52509.06913v2 · Struan D. Stevenson, Adam C. Carnall, Ho-Hin Leung et al.2025 · 13 citationsMon Not R Astron Soc (2025)
Lyα\alpha visibility from z = 4.5 to 11 in the UDS field: Evidence for a high neutral hydrogen fraction and small ionized bubbles at z ∼\sim 72508.14171v2 · L. Napolitano, L. Pentericci, M. Dickinson et al.2025 · 5 citationsarXiv
Strength in Numbers: Red Galaxies Bolster the Cosmic Star Formation Rate Density at z > 32508.05740v1 · L. Barrufet, J.S. Dunlop, R. Begley et al.2025 · 3 citationsMon Not R Astron Soc (2026)
Very bright, very blue, and very red: JWST CAPERS analysis of highly luminous galaxies with extreme UV slopes at z=10\mathbf{z = 10}2507.10518v2 · Callum T. Donnan, Mark Dickinson, Anthony J. Taylor et al.2025 · 1 citationarXiv
JWST PRIMER: A deep JWST study of all ALMA-detected galaxies in PRIMER COSMOS -- dust-obscured star-formation history back to z ≃\simeq 72503.07774v2 · Feng-Yuan Liu, James S. Dunlop, Ross J. McLure et al.2025 · 9 citationsMon Not R Astron Soc (2025)
The JWST EXCELS survey: an extremely metal-poor galaxy at z=8.271z=8.271 hosting an unusual population of massive stars2501.11099v4 · F. Cullen, A. C. Carnall, D. Scholte et al.2025 · 33 citationsarXiv
The JWST EXCELS survey: direct estimates of C, N, and O abundances in two relatively metal-rich galaxies at z≃5\mathbf{z\simeq5}2412.10557v2 · K. Z. Arellano-C'ordova, F. Cullen, A. C. Carnall et al.2024 · 1 citationarXiv
JWST PRIMER: strong evidence for the environmental quenching of low-mass galaxies out to z≃2\mathbf{\textit{z} \simeq 2}2412.09592v1 · M. L. Hamadouche, R. J. McLure, A. Carnall et al.2024 · 1 citationarXiv
High-z stellar masses can be recovered robustly with JWST photometry2412.02622v1 · R. K. Cochrane, H. Katz, R. Begley et al.2024 · 14 citationsarXiv
The JWST EXCELS survey: tracing the chemical enrichment pathways of high-redshift star-forming galaxies with O, Ar and Ne abundances2411.11837v3 · T. M. Stanton, F. Cullen, A. C. Carnall et al.2024 · 22 citationsarXiv
The evolution of [OIII]+Hβ+\rm{H}\beta equivalent width from z≃3−8\mathbf{z\simeq3-8}: implications for the production and escape of ionizing photons during reionization2410.10988v2 · R. Begley, R. J. McLure, F. Cullen et al.2024 · 1 citationarXiv
Inferring the Distribution of the Ionising Photon Escape Fraction2405.10364v1 · Kimi C. Kreilgaard, Charlotte A. Mason, Fergus Cullen et al.2024 · 7 citationsA&A 692, A57 (2024)
Comparing the VANDELS sample to a zoom-in Radiative Hydrodynamical Simulation: using the Si II and C II line spectra as tracers of galaxy evolution and Lyman Continuum leakage2405.03759v1 · Simon Gazagnes, Fergus Cullen, Valentin Mauerhofer et al.2024 · 8 citationsarXiv
The JWST EXCELS survey: Too much, too young, too fast? Ultra-massive quiescent galaxies at 3 < z < 52405.02242v2 · A. C. Carnall, F. Cullen, R. J. McLure et al.2024 · 132 citationsarXiv
The NIRVANDELS Survey: the stellar and gas-phase mass-metallicity relations of star-forming galaxies at z = 3.52405.00774v2 · T. M. Stanton, F. Cullen, R. J. McLure et al.2024 · 33 citationsarXiv
JWST PRIMER: A new multi-field determination of the evolving galaxy UV luminosity function at redshifts z≃9−15\mathbf{z \simeq 9-15}2403.03171v3 · C. T. Donnan, R. J. McLure, J. S. Dunlop et al.2024 · 11 citationsarXiv
The ultraviolet continuum slopes of high-redshift galaxies: evidence for the emergence of dust-free stellar populations at z > 102311.06209v2 · F. Cullen, D. J. McLeod, R. J. McLure et al.2023 · 82 citationsarXiv
Connecting the escape fraction of Lyman-alpha and Lyman-continuum photons in star-forming galaxies at z≃4−5\mathbf{z\simeq 4-5}2306.03916v2 · R. Begley, F. Cullen, R. J. McLure et al.2023 · 1 citationarXiv
A massive quiescent galaxy at redshift 4.658.37216978 · Carnall, Adam C, McLure, Ross J, Dunlop, James S et al.2023 · 236 citationsNature. 2023;619(7971):716-719
The galaxy UV luminosity function at z≃11\mathbf{z \simeq 11} from a suite of public JWST ERS, ERO and Cycle-1 programs2304.14469v2 · D. J. McLeod, C. T. Donnan, R. J. McLure et al.2023 · 7 citationsarXiv
The connection between stellar mass, age and quenching timescale in massive quiescent galaxies at z≃1z \simeq 12303.06107v1 · M.L. Hamadouche, A. C. Carnall, R. J. McLure et al.2023 · 10 citationsarXiv
Demonstration of Accuracy and Feasibility of Remotely Delivered Oximetry: A Blinded, Controlled, Real-World Study of Regional/Rural Children with Obstructive Sleep Apnoea.36673646 · Begley, Ryan, Kanagasingam, Yogesan, Chan, Chun et al.2023 · 2 citationsHealthcare (Basel, Switzerland). 2023;11(2)
The ultraviolet continuum slopes (β\mathbf{\beta}) of galaxies at z≃8−16\mathbf{z\simeq8-16} from JWST and ground-based near-infrared imaging2208.04914v4 · F. Cullen, R. J. McLure, D. J. McLeod et al.2022 · 117 citationsarXiv
A surprising abundance of massive quiescent galaxies at 3 < z < 5 in the first data from JWST CEERS2208.00986v3 · A. C. Carnall, D. J. McLeod, R. J. McLure et al.2022 · 163 citationsarXiv
The evolution of the galaxy UV luminosity function at redshifts z ~ 8-15 from deep JWST and ground-based near-infrared imaging2207.12356v3 · C. T. Donnan, D. J. McLeod, J. S. Dunlop et al.2022 · 433 citationsarXiv
A first look at the SMACS0723 JWST ERO: spectroscopic redshifts, stellar masses and star-formation histories2207.08778v2 · A. C. Carnall, R. Begley, D. J. McLeod et al.2022 · 107 citationsarXiv
The VANDELS survey: a measurement of the average Lyman-continuum escape fraction of star-forming galaxies at z=3.52202.04088v2 · R. Begley, F. Cullen, R. J. McLure et al.2022 · 52 citationsarXiv
A combined VANDELS and LEGA-C study: the evolution of quiescent galaxy size, stellar mass and age from z=0.6\mathbf{\textit{z} = 0.6} to z=1.3\mathbf{\textit{z} = 1.3}2201.10576v2 · M. L. Hamadouche, A. C. Carnall, R. J. McLure et al.2022 · 35 citationsarXiv
The stellar metallicities of massive quiescent galaxies at 1.0 < z < 1.3 from KMOS+VANDELS2108.13430v3 · A. C. Carnall, R. J. McLure, J. S. Dunlop et al.2021 · 38 citationsarXiv
The NIRVANDELS Survey: a robust detection of α\alpha-enhancement in star-forming galaxies at z≃3.4z\simeq3.42103.06300v2 · F. Cullen, A. E. Shapley, R. J. McLure et al.2021 · 88 citationsarXiv
The VANDELS ESO public spectroscopic survey: final Data Release of 2087 spectra and spectroscopic measurements2101.07645v1 · B. Garilli, R. McLure, L. Pentericci et al.2021 · 92 citationsA&A 647, A150 (2021)
Career total: 60 works. 45 are in this corpus.

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