2020MNRAS.496..913D

Query : 2020MNRAS.496..913D

2020MNRAS.496..913D - Mon. Not. R. Astron. Soc., 496, 913-920 (2020/July-3)

Cold H I ejected into the Magellanic Stream.

DEMPSEY J., McCLURE-GRIFFITHS N.M., JAMESON K. and BUCKLAND-WILLIS F.

Abstract (from CDS):

We report the direct detection of cold H I gas in a cloud ejected from the Small Magellanic Cloud (SMC) towards the Magellanic Stream. The cloud is part of a fragmented shell of H I gas on the outskirts of the SMC. This is the second direct detection of cold H I associated with the Magellanic Stream using absorption. The cold gas was detected using 21-cm H I absorption-line observations with the Australia Telescope Compact Array (ATCA) towards the extra-galactic source PMN J0029-7228. We find a spin (excitation) temperature for the gas of 68 ± 20 K. We suggest that breaking super shells from the Magellanic Clouds may be a source of cold gas to supply the rest of the Magellanic Stream.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): ISM: clouds - galaxies: ISM - Magellanic Clouds - radio lines: ISM

Nomenclature: Fig. 5, Table 1: [DMJ2020] SUMSS J012734-713639A (Nos A-B).

Simbad objects: 15

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Number of rows : 15
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 NAME SMC B0027-7245 Rad 00 29 23 -72 28.4           ~ 4 0
2 NAME Magellanic Stream HVC 00 32 -30.0           ~ 1079 1
3 PKS J0043-7041 Rad 00 43 26.94 -70 41 35.2           ~ 5 1
4 [DMS2000b] J004330-704148 Rad 00 43 30.7 -70 41 48           ~ 3 0
5 PMN J0049-7001 Rad 00 49 38.1 -70 01 04           ~ 4 0
6 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
7 PMN J0104-7038 Rad 01 04 59.1 -70 37 36           ~ 7 1
8 [FBR2002] J010620-704143 Rad 01 06 22.2 -70 41 46           ~ 4 1
9 PKS J0119-6809 Rad 01 19 41.81711 -68 09 35.1566           ~ 10 1
10 GLEAM J012733-713636 Rad 01 27 34.1 -71 36 39           ~ 4 1
11 PKS 0252-712 rG 02 52 46.15578 -71 04 35.2742   19.0 19.0     ~ 104 1
12 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
13 NAME Magellanic Bridge HI 03 11 -77.5           ~ 522 1
14 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
15 ICRF J193925.0-634245 Sy2 19 39 25.0245304992 -63 42 45.640373400   18.87 18.37 17.64   ~ 1332 2

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