2025ApJ...980...74W

Query : 2025ApJ...980...74W

2025ApJ...980...74W - Astrophys. J., 980, 74 (2025/February-2)

The Lyman Continuum Escape Fraction of Star-forming Galaxies at 2.4 ≲ z ≲ 3.0 from UVCANDELS.

WANG X., TEPLITZ H.I., SMITH B.M., WINDHORST R.A., RAFELSKI M., MEHTA V., ALAVI A., JI Z., BRAMMER G., COLBERT J., GROGIN N., HATHI N.P., KOEKEMOER A.M., PRICHARD L., SCARLATA C., SUNNQUIST B., ARRABAL HARO P., CONSELICE C., GAWISER E., GUO Y., HAYES M., JANSEN R.A., LUCAS R.A., O'CONNELL R., ROBERTSON B., RUTKOWSKI M., SIANA B., VANZELLA E., ASHCRAFT T., BAGLEY M., BARONCHELLI I., BARRO G., BLANCHE A., BROUSSARD A., CARLETON T., CHARTAB N., CHENG Y., CODOREANU A., COHEN S., DAI Y.S., DARVISH B., DAVE R., DEGROOT L., DE MELLO D., DICKINSON M., EMAMI N., FERGUSON H., FERREIRA L., FINKELSTEIN K., FINKELSTEIN S., GARDNER J.P., GBUREK T., GIAVALISCO M., GRAZIAN A., GRONWALL C., HEMMATI S., HOWELL J., IYER K., KAVIRAJ S., KURCZYNSKI P., LAZAR I., MacKENTY J., MANTHA K.B., MARTIN A., MARTIN G., McCABE T., MOBASHER B., NEDKOVA K., OLSEN C., OTTESON L., RAVINDRANATH S., REDSHAW C., SATTARI Z., SOTO E., YUNG L.Y.A., ZABELLE B. (The UVCANDELS Team)

Abstract (from CDS):

The UltraViolet Imaging of the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey Fields (UVCANDELS) survey is a Hubble Space Telescope (HST) Cycle-26 Treasury Program, allocated in total 164 orbits of primary Wide-Field Camera 3 Ultraviolet and VISible light F275W imaging with coordinated parallel Advanced Camera for Surveys F435W imaging, on four of the five premier extragalactic survey fields: GOODS-N, GOODS-S, EGS, and COSMOS. We introduce this survey by presenting a comprehensive analysis of the absolute escape fraction (${f}_{{\rm{esc}}}^{{\rm{abs}}}$) of Lyman continuum radiation through stacking the UV images of a population of star-forming galaxies with secure redshifts at 2.4 ≤ z ≤ 3.0. Our stacking benefits from the catalogs of high-quality spectroscopic redshifts compiled from archival ground-based data and HST slitless spectroscopy, carefully vetted by dedicated visual inspection efforts. We develop a robust stacking method to apply to 10 samples of in total 56 galaxies, and perform detailed Monte Carlo simulations of the intergalactic medium (IGM) attenuation, to take into account the sample variance of the mean IGM transmission when measuring ${f}_{{\rm{esc}}}^{{\rm{abs}}}$. The full stack at z ≈ 2.44 from 28 galaxies places a stringent 1σ upper limit of ${f}_{{\rm{esc}}}^{{\rm{abs}}}\lesssim 5 \% $, whereas the full stack at z ≈ 2.72 of an equal number of galaxies gives an upper limit of ${f}_{{\rm{esc}}}^{{\rm{abs}}}\lesssim 26 \% $ at 1σ confidence level. These new F275W and F435W imaging mosaics from UVCANDELS have been made publicly available on the Barbara A. Mikulski Archive for Space Telescopes.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Reionization - Intergalactic medium - Ultraviolet surveys - High-redshift galaxies - Galaxy evolution

Simbad objects: 10

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Number of rows : 10
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 COSMOS 1971073 G 10 00 43.11 +02 24 58.2   25.755 25.184     ~ 3 0
2 GOODS J123638.17+620656.0 AGN 12 36 38.1698 +62 06 56.030   26.0905   24.1 24.0337 ~ 12 0
3 Cowie 169 G 12 36 41.7248 +62 12 39.153 25.17 24.8034 25.19 24.32 24.6315 ~ 28 0
4 MODS deep 88 rG 12 36 43.16 +62 11 08.8 24.78 25.51 24.36     ~ 10 0
5 GNS 1444 EmG 12 37 09.7384 +62 10 16.776 28.30 26.3890   24.75 24.7770 ~ 13 0
6 [BCW2008] 189.311920+62.29649 G 12 37 14.8612 +62 17 47.764 25.28 24.7069 24.67 24.27 24.0601 ~ 6 0
7 GOODS J123728.12+621440.3 EmG 12 37 28.1206 +62 14 40.293 24.93 23.9110 23.87 23.29 23.3053 ~ 13 0
8 GOODS J123730.81+621655.4 G 12 37 30.8104 +62 16 55.350 25.75 25.2446 25.16 24.80 24.6341 ~ 7 0
9 GOODS J123732.34+621311.2 G 12 37 32.3444 +62 13 11.196 29.53 25.7110   25.10 24.7805 ~ 6 0
10 CANDELS EGS F160W J142009.8+525943.0 G 14 20 09.754 +52 59 43.02           ~ 4 0

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