2009AJ....138.1911S

Query : 2009AJ....138.1911S

2009AJ....138.1911S - Astron. J., 138, 1911-1916 (2009/December-0)

Tidal dwarf galaxies around a post-merger galaxy, NGC 4922.

SHEEN Y.-K., JEONG H., YI S.K., FERRERAS I., LOTZ J.M., OLSEN K.A.G., DICKINSON M., BARNES S., PARK J.-H., REE C.H., MADORE B.F., BARLOW T.A., CONROW T., FOSTER K., FRIENDMAN P.G., LEE Y.-W., MARTIN D.C., MORRISSEY P., NEFF S.G., SCHIMINOVICH D., SEIBERT M., SMALL T. and WYDER T.K.

Abstract (from CDS):

One possible channel for the formation of dwarf galaxies involves birth in the tidal tails of interacting galaxies. We report the detection of a bright UV tidal tail and several young tidal dwarf galaxy (TDG) candidates in the post-merger galaxy NGC 4922 in the Coma cluster. Based on a two-component population model (combining young and old stellar populations), we find that the light of tidal tail predominantly comes from young stars (a few Myr old). The Galaxy Evolution Explorer ultraviolet data played a critical role in the parameter (age and mass) estimation. Our stellar mass estimates of the TDG candidates are ∼106–7 M☉, typical for dwarf galaxies.

Abstract Copyright: ∼

Journal keyword(s): galaxies: dwarf - galaxies: individual: NGC 4922 - galaxies: interactions - galaxies: starburst - ultraviolet: galaxies

Nomenclature: Text, Table 1: [SJY2009] TDGN (Nos TDG1-TDG3), [SJY2009] NUVN (Nos NUV1-NUV3).

Simbad objects: 12

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Number of rows : 12
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 NGC 4016 AG? 11 58 29.02511 +27 31 43.6086   14.6       ~ 79 0
2 NGC 4038 EmG 12 01 53.002 -18 52 03.32   10.91   9.74 11.0 ~ 1364 1
3 NAME Antennae IG 12 01 53.170 -18 52 37.92           ~ 1749 0
4 NGC 4039 GiP 12 01 53.51 -18 53 10.3   11.08   9.77   ~ 1173 1
5 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
6 NGC 4922N Sy2 13 01 25.2660290577 +29 18 49.879144069   15.60 14.67 13.85   ~ 265 5
7 [SJY2009] TDG3 G 13 01 25.79 +29 17 07.5           ~ 1 0
8 [SJY2009] NUV1 UV 13 01 26.47 +29 17 10.5           ~ 1 0
9 [SJY2009] TDG2 G 13 01 26.56 +29 17 39.4           ~ 1 0
10 [SJY2009] TDG1 G 13 01 26.62 +29 17 12.5           ~ 1 0
11 [SJY2009] NUV2 UV 13 01 26.97 +29 17 21.5           ~ 1 0
12 [SJY2009] NUV3 UV 13 01 26.97 +29 17 36.5           ~ 1 0

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