1999AJ....117.2168P

Query : 1999AJ....117.2168P

1999AJ....117.2168P - Astron. J., 117, 2168-2176 (1999/May-0)

Gas-rich companions of isolated galaxies.

PISANO D.J. and WILCOTS E.M.

Abstract (from CDS):

We have used the VLA to search for gaseous remnants of the galaxy formation process around six extremely isolated galaxies. We found two distinct H I clouds around each of two galaxies in our sample (UGC 9762 and UGC 11124). These clouds are rotating and appear to have optical counterparts, strongly implying that they are typical dwarf galaxies. The companions are currently weakly interacting with the primary galaxy but look to be in stable orbits as they have dynamical friction timescales of 5-100 Gyr. In one case, (UGC 11124N), we see ongoing accretion of the companion onto the primary galaxy. The small mass ratio involved in this interaction means that the resulting merger will be a minor one. The companion does, however, contain enough gas that the merger will represent a significant infusion of fuel to drive future star formation in UGC 11124 while building up the mass of the disk.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Evolution - Galaxies: Formation - Galaxies: Interactions - Galaxies: Spiral

Nomenclature: Tables 3, 4: [PW99] UGC 11124 W (Nos N, S), [PW99] UGC 9762 W (Nos N, S).

Simbad objects: 24

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Number of rows : 24
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 M 74 G 01 36 41.7451236624 +15 47 01.107512304 10.52 10.00 9.46 9.16   ~ 1934 1
2 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2924 2
3 NGC 925 H2G 02 27 16.913 +33 34 43.97   10.69 10.12 9.55   ~ 818 1
4 NGC 2915 AG? 09 26 11.532 -76 37 34.75 13.13 12.93 12.68 11.90 12.8 ~ 371 2
5 NAME M 81-82 Group GrG 09 55 +69.1           ~ 758 0
6 NGC 3246 AG? 10 26 41.766 +03 51 43.59   13.8       ~ 81 0
7 NGC 3432 AG? 10 52 31.132 +36 37 07.60   11.81 11.67 11.29   ~ 321 1
8 Z 186-78 GiG 11 58 29.804 +38 04 34.80   15.2       ~ 83 0
9 NGC 4288 GiG 12 20 38.119 +46 17 27.67   13.6       ~ 187 0
10 NGC 4789A GiC 12 54 05.248 +27 08 58.67 14.37 14.23 13.95 13.84   ~ 614 1
11 Mrk 59 rG 12 59 00.288 +34 50 42.45           ~ 319 2
12 NGC 4861 H2G 12 59 02.340 +34 51 33.98   12.90 12.32     ~ 389 2
13 Z 245-36 AG? 13 14 27.997 +45 55 11.14 13.63 13.26 13.02 12.81   ~ 297 0
14 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2
15 UGC 9762 AG? 15 11 41.134 +32 38 34.56   17       ~ 30 1
16 LEDA 3098573 AG? 15 11 54.121 +32 45 34.02           ~ 17 1
17 LEDA 2004197 AG? 15 11 56.7228525264 +32 35 53.096381016           ~ 16 1
18 NGC 6339 AG? 17 17 06.4816037376 +40 50 41.528749272   13.7       ~ 85 0
19 LEDA 2070848 G 18 03 58.4712067248 +35 50 32.865839520           ~ 3 0
20 Z 200-5 LSB 18 07 27.63 +35 33 51.1   13.9       ~ 40 1
21 LEDA 3088568 AG? 18 07 29.07 +35 37 26.1           ~ 9 1
22 [PW99] UGC 11124 S AG? 18 07 45.06 +35 23 35.5           ~ 5 1
23 Z 304-5 LSB 20 24 00.6851855760 +60 11 41.414285040   14.5       ~ 77 0
24 Z 343-3 AG? 21 56 24.148 +73 15 39.33   15.2       ~ 102 0

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