2024MNRAS.528.4010O

Query : 2024MNRAS.528.4010O

2024MNRAS.528.4010O - Mon. Not. R. Astron. Soc., 528, 4010-4028 (2024/March-1)

WALLABY pilot survey: an 'almost' dark cloud near the Hydra cluster.

O'BEIRNE T., STAVELEY-SMITH L., WONG O.I., WESTMEIER T., BATTEN G., KILBORN V.A., LEE-WADDELL K., MANCERA PINA P.E., ROMAN J., VERDES-MONTENEGRO L., CATINELLA B., CORTESE L., DEG N., DENES H., FOR B.-Q., KAMPHUIS P., KORIBALSKI B.S., MURUGESHAN C., RHEE J., SPEKKENS K., WANG J., BEKKI K. and LOPEZ-SANCHEZ A.R.

Abstract (from CDS):

We explore the properties of an 'almost' dark cloud of neutral hydrogen (H I) using data from the Widefield ASKAP L-band Legacy All-sky Survey (WALLABY). Until recently, WALLABY J103508 - 283427 (also known as H1032 - 2819 or LEDA 2793457) was not known to have an optical counterpart, but we have identified an extremely faint optical counterpart in the Dark Energy Spectroscopic Instrument (DESI) Legacy Imaging Survey Data Release 10. We measured the mean g-band surface brightness to be 27.0 ± 0.3 mag arcsec–2. The WALLABY data revealed the cloud to be closely associated with the interacting group Klemola 13 (also known as HIPASS J1034 - 28 and the Tol 9 group), which itself is associated with the Hydra cluster. In addition to WALLABY J103508 - 283427/H1032 - 2819, Klemola 13 contains 10 known significant galaxies and almost half of the total H I gas is beyond the optical limits of the galaxies. By combining the new WALLABY data with archival data from the Australia Telescope Compact Array, we investigate the H I distribution and kinematics of the system. We discuss the relative role of tidal interactions and ram pressure stripping in the formation of the cloud and the evolution of the system. The ease of detection of this cloud and intragroup gas is due to the sensitivity, resolution, and wide field of view of WALLABY, and showcases the potential of the full WALLABY survey to detect many more examples.

Abstract Copyright: © The Author(s) 2024. Published by Oxford University Press on behalf of Royal Astronomical Society.

Journal keyword(s): surveys - galaxies: evolution - galaxies: groups: individual: Klemola 13 - galaxies: interactions - galaxies: kinematics and dynamics

Simbad objects: 30

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Number of rows : 30
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 Eridanus ClG GrG 03 38 32.00 -22 18 51.0           ~ 200 0
2 NAME HYA SUPERCL SCG 08 57.9 +03 10           ~ 204 0
3 QSO B1015-314 QSO 10 18 09.2596731312 -31 44 14.006765436   21 20.4     ~ 73 1
4 LEDA 31270 EmG 10 34 16.560 -28 34 05.75   15.87   14.87   ~ 21 0
5 2MASX J10343675-2835218 GiC 10 34 36.7313165712 -28 35 21.459518412   16.54   15.68   ~ 12 0
6 ESO 436-42 Sy2 10 34 38.727 -28 34 59.80   14.44 14.41 13.26   ~ 63 0
7 WALLABY J103442-283406 HI 10 34 42.8732739497 -28 34 06.989269128           ~ 3 0
8 MCG-05-25-016 GiG 10 34 47.4568891920 -28 29 46.869192240   13.90   12.65   ~ 44 0
9 HIPASS J1034-28 ClG 10 34.8 -28 29           ~ 8 0
10 ESO 437-1 GiC 10 34 49.010 -28 25 02.55   16.00   14.60   ~ 25 0
11 MCG-05-25-017 EmG 10 34 50.5358269944 -28 34 58.928165544   13.44   12.24   ~ 43 0
12 ESO 436-45 GiG 10 34 50.8443253512 -28 30 45.664971048   15.10   13.72   ~ 35 0
13 LEDA 2793457 G 10 35 10.1 -28 34 56           ~ 5 0
14 MCG-05-25-019 Sy2 10 35 23.2645497216 -28 18 50.543337708   13.96   12.72   ~ 70 0
15 2MASX J10355363-2817269 GiG 10 35 53.6105072448 -28 17 26.920288572   14.9       ~ 25 0
16 NAME Hydra I Cluster ClG 10 36 36.0 -27 31 04           ~ 905 1
17 M 95 GiP 10 43 57.7313485800 +11 42 13.301191332 10.71 10.51 9.73 9.48   ~ 1238 2
18 NAME M 96 Group GrG 10 46 45 +11 49.1           ~ 330 0
19 M 96 GiP 10 46 45.744 +11 49 11.78 10.42 10.15 9.25 8.99   ~ 862 1
20 NAME NGC 3370 Group GrG 10 47 +17.3           ~ 2 0
21 MCG-06-25-020 GiG 11 28 04.014 -36 32 33.67   13.85   12.05 13.0 ~ 51 0
22 NAME NGC 3783 Group GrG 11 39 01.8 -37 44 19           ~ 13 0
23 [KGH2007] 6 G 12 17 51 +14 46.5           ~ 56 0
24 M 99 H2G 12 18 49.625 +14 24 59.36 10.45 10.44 9.87     ~ 1004 2
25 NGC 4388 Sy2 12 25 46.820 +12 39 43.45 11.91 11.76 11.02     ~ 1433 2
26 NAME DW 1225+0152 LSB 12 27 46.1 +01 36 01 15.45 16.02 15.92 15.73   ~ 47 0
27 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
28 ICRF J193925.0-634245 Sy2 19 39 25.0245304992 -63 42 45.640373400   18.87 18.37 17.64   ~ 1332 2
29 NGC 7545 AG? 23 15 32.0732161728 -38 32 08.103053292   13.84   12.89   ~ 36 0
30 NAME Leo Ring HI ~ ~           ~ 62 0

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