2024MNRAS.528..757L

Query : 2024MNRAS.528..757L

2024MNRAS.528..757L - Mon. Not. R. Astron. Soc., 528, 757-770 (2024/February-2)

Tidally offset neutral gas in Lyman continuum emitting galaxy Haro 11.

LE RESTE A., CANNON J.M., HAYES M.J., INOUE J.L., KEPLEY A.A., MELINDER J., MENACHO V., ADAMO A., BIK A., EJDETJARN T., JOZSA G.I.G., OSTLIN G. and TAFT S.H.

Abstract (from CDS):

Around 400 Myr after the big bang, the ultraviolet emission from star-forming galaxies reionized the Universe. Ionizing radiation (Lyman continuum, LyC) is absorbed by cold neutral hydrogen gas (H I) within galaxies, hindering the escape of LyC photons. Since the H I reservoir of LyC emitters has never been mapped, major uncertainties remain on how LyC photons escape galaxies and ionize the intergalactic medium. We have directly imaged the neutral gas in the nearby reionization-era analogue galaxy Haro 11 with the 21 cm line to identify the mechanism enabling ionizing radiation escape. We find that merger-driven interactions have caused a bulk offset of the neutral gas by about $6\,$ kpc from the centre of the galaxy, where LyC emission production sites are located. This could facilitate the escape of ionizing radiation into our line of sight. Galaxy interactions can cause both elevated LyC production and large-scale displacement of H I from the regions where these photons are produced. They could contribute to the anisotropic escape of LyC radiation from galaxies and the reionization of the Universe. We argue for a systematic assessment of the effect of environment on LyC production and escape.

Abstract Copyright: © The Author(s) 2023. Published by Oxford University Press on behalf of Royal Astronomical Society.

Journal keyword(s): ISM: lines and bands - galaxies: interactions - galaxies: ISM - galaxies: starburst - radio lines: galaxies - ultraviolet: galaxies

Simbad objects: 21

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Number of rows : 21
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 ICRF J001259.9-395426 BLL 00 12 59.9097885288 -39 54 26.056833444   18.33   18.05   ~ 84 1
2 PKS 0022-42 rG 00 24 42.98990924 -42 02 03.9490020   22       ~ 67 1
3 QSO B0023-263 BLL 00 25 49.15629900 -26 02 12.6141092   20.30 19.5 18.084   ~ 173 1
4 [VFT93] 0034-3349B HXB 00 36 52.454 -33 33 16.77           ~ 24 0
5 ESO 350-38 Sy2 00 36 52.489 -33 33 17.23   14.31 14.41 13.49   ~ 450 0
6 [VFT93] 0034-3349A G 00 36 52.543 -33 33 16.57   11.93   11.28   ~ 19 0
7 [VFT93] 0034-3349C HXB 00 36 52.660 -33 33 17.07           ~ 26 0
8 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2924 2
9 LEDA 8493 H2G 02 13 06.6126744312 +00 56 12.461042400           ~ 21 0
10 NGC 925 H2G 02 27 16.913 +33 34 43.97   10.69 10.12 9.55   ~ 818 1
11 ICRF J040820.3-654509 Sy2 04 08 20.37884 -65 45 09.0806     18.0     ~ 207 1
12 NGC 2903 AGN 09 32 10.111 +21 30 02.99 10.44 9.75 9.07 8.68   ~ 1204 3
13 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4725 3
14 NGC 3198 EmG 10 19 54.990 +45 32 58.88 10.83 10.87 10.33     ~ 946 1
15 NGC 3621 Sy2 11 18 16.300 -32 48 45.36 10.10 9.44 9.56 8.07 10.1 ~ 661 3
16 NAME Antennae IG 12 01 53.170 -18 52 37.92           ~ 1749 0
17 EC 12476-2317 AGN 12 50 18.90 -23 33 57.6   16.29 15.46     ~ 72 0
18 M 94 SyG 12 50 53.0737971432 +41 07 12.900884628 9.15 8.96 8.24 7.78   ~ 1476 2
19 Z 189-2 GiC 12 56 55.638 +32 26 51.50   15.1       ~ 90 0
20 ICRF J193925.0-634245 Sy2 19 39 25.0245304992 -63 42 45.640373400   18.87 18.37 17.64   ~ 1332 2
21 NGC 6946 H2G 20 34 52.332 +60 09 13.24   10.5       ~ 2661 2

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