2020MNRAS.492....1B

Query : 2020MNRAS.492....1B

2020MNRAS.492....1B - Mon. Not. R. Astron. Soc., 492, 1-7 (2020/February-2)

Discovery of a large H I ring around the quiescent galaxy AGC 203001.

BAIT O., KURAPATI S., DUC P.-A., CUILLANDRE J.-C., WADADEKAR Y., KAMPHUIS P. and BARWAY S.

Abstract (from CDS):

Here we report the discovery with the Giant Metrewave Radio Telescope of an extremely large (∼115 kpc in diameter) H I ring, located around a massive quenched galaxy, AGC 203001, but off-centered, with respect to it. This ring does not have any bright extended optical counterpart unlike several other known ring galaxies. Our deep g, r, and i optical imaging of the H I ring, using the MegaCam instrument on the Canada-France-Hawaii Telescope, shows however several regions with faint optical emission at a surface brightness level of ∼28 mag/arcsec2. Such an extended H I structure is very rare with only one other case known so far - the Leo ring. Conventionally, off-centered rings have been explained by a collision with an "intruder" galaxy leading to expanding density waves of gas and stars in the form of a ring. However, in such a scenario the impact also leads to large amounts of star formation in the ring which is not observed in the ring presented in this paper. We discuss possible scenarios for the formation of such H I dominated rings.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): galaxies: evolution - galaxies: groups - galaxies: interactions - galaxies: general

Nomenclature: Figs 1- 2, Table 2: [BKD2020] HI Ring N=1, [BKD2020] OCN (Nos OC1-OC5).

Simbad objects: 36

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Number of rows : 36
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 MCG-06-02-022a EmG 00 37 41.1133192392 -33 42 58.515101748   19.26   18.52   ~ 314 1
2 SDSS J011746.76+131924.5 G 01 17 46.7630626200 +13 19 24.528682848           ~ 14 0
3 NGC 680 GiP 01 49 47.2923018240 +21 58 15.142526652   13.0       ~ 154 0
4 NGC 871 GiG 02 17 10.734 +14 32 52.10   14.20 13.61     ~ 74 1
5 NGC 876 GiG 02 17 53.327 +14 31 17.91   16.5       ~ 69 0
6 NGC 877 LSB 02 17 59.6453041536 +14 32 38.215857696   12.5       ~ 189 1
7 Z 145-17 Sy2 06 52 02.5060831464 +27 27 39.387328884   14.9       ~ 83 1
8 NGC 3166 GiP 10 13 45.7270131936 +03 25 29.310401424   11.2       ~ 246 0
9 USGC U292 GrG 10 18 04.6 +13 13 55           ~ 2 0
10 WBL 263 ClG 10 18.7 +13 13           ~ 2 0
11 SDSS J102131.98+134122.0 G 10 21 31.98480 +13 41 22.0020           ~ 1 0
12 LEDA 1438378 AG? 10 21 49.5603447624 +13 42 45.956507364           ~ 10 0
13 [BKD2020] HI Ring HI 10 22 03.3 +13 46 10           ~ 1 0
14 LEDA 3090726 AG? 10 22 03.3116142912 +13 46 10.195896216           ~ 21 0
15 [BKD2020] OC1 ? 10 22 06.83 +13 48 30.4           ~ 1 0
16 [BKD2020] OC5 ? 10 22 07.73 +13 45 06.3           ~ 1 0
17 [BKD2020] OC4 ? 10 22 08.87 +13 45 59.7           ~ 1 0
18 [BKD2020] OC2 ? 10 22 09.58 +13 47 58.6           ~ 1 0
19 [BKD2020] OC3 ? 10 22 11.26 +13 46 51.1           ~ 1 0
20 2MASS J10222173+1350588 AG? 10 22 21.73128 +13 50 58.8012           ~ 2 0
21 AGC 202026 LSB 10 46 30.2 +11 45 21   19.0       ~ 17 0
22 LEDA 83336 GiG 10 46 41.316 +12 19 37.37   16.98       ~ 24 0
23 NAME M 96 Group GrG 10 46 45 +11 49.1           ~ 330 0
24 M 96 GiP 10 46 45.744 +11 49 11.78 10.42 10.15 9.25 8.99   ~ 862 1
25 NAME Leo dwA LSB 10 46 52.9 +12 44 32     16.6   16.4 ~ 31 0
26 MATLAS-746 LSB 10 46 57.4 +12 59 54   17.5 16.6   16.1 ~ 23 0
27 AGC 201975 GiG 10 47 00.6 +12 57 37           ~ 16 0
28 AGC 201972 G 10 47 09.2 +13 00 17           ~ 3 0
29 AGC 205505 G 10 47 20.1 +12 23 15           ~ 2 0
30 [MCW2018] BST J1047+1156 LSB 10 47 43.8 +11 56 01   20.02 19.86     ~ 7 0
31 M 105 LIN 10 47 49.600 +12 34 53.87   10.56 9.76 9.12 8.18 ~ 1504 0
32 NGC 3384 GiG 10 48 16.8855574392 +12 37 45.371165844   10.0       ~ 617 1
33 NGC 4262 GiG 12 19 30.5694336288 +14 52 39.517143276 13.00 12.49 11.55     ~ 378 1
34 NGC 5266 Sy2 13 43 02.0849196792 -48 10 10.000751592   11.89 11.14 11.9 11.3 ~ 167 0
35 Z 192-59 AG? 14 46 21.127 +34 22 14.34   14.4       ~ 103 0
36 NAME Leo Ring HI ~ ~           ~ 62 0

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