2003A&A...397..545W


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.13CEST01:09:16

2003A&A...397..545W - Astronomy and Astrophysics, volume 397, 545-555 (2003/1-2)

Tidal dwarf candidates in a sample of interacting galaxies. II. Properties and kinematics of the ionized gas.

WEILBACHER P.M., DUC P.-A. and FRITZE-v.ALVENSLEBEN U.

Abstract (from CDS):

We present low-resolution spectroscopy of the ionized gas in a sample of optical knots located along the tidal features of 14 interacting galaxies previously selected as candidate Tidal Dwarf Galaxies (TDGs). From redshift measurements, we are able to confirm their physical association with the interacting system in almost all cases. For most knots, the oxygen abundance does not depend on the blue luminosity. The average, 12+log(O/H)=8.34±0.20, is typical of TDGs and is comparable to that measured in the outer stellar disk of spirals from which they were formed. A few knots showing low metallicities are probably pre-existing low-mass companions. The estimated Hα luminosity of the TDG candidates is higher than that of typical individual HII regions in spiral disks and is comparable to the global Hα luminosity of dwarf galaxies. We find several instances of velocity gradients with amplitudes apparently larger than 100km/s in the ionized gas in the tidal knots and discuss various possible origins for the large velocity amplitudes. While we can exclude tidal streaming motions and outflows, we cannot rule out projection effects with the current resolution. The velocity gradients could be indicative of the internal kinematic characteristic of self-gravitating objects. Higher resolution spectra are required to confirm whether the tidal knots in our sample have already acquired their dynamical independence and are therefore genuine Tidal Dwarf Galaxies.

Abstract Copyright:

Journal keyword(s): galaxies: formation - galaxies: interactions - techniques: spectroscopic - galaxies: photometry

Nomenclature: Tables, text: [WDF2000] AM HHMM+DDd A N=9 added, [WDF2000] AM HHMM+DDd a, N=12 added.

Status at CDS:   All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 41

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Number of rows : 41

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14832 1
2 ESO 159-16 PaG 05 30 18.1 -56 52 12   18.52   17.68   ~ 5 0
3 [WDF2000] AM 0529-565 D ? 05 30 18.98 -56 52 36.9   18.46       ~ 2 0
4 ESO 424-5 LSB 05 39 21.500 -29 22 21.23   15.05   14.06   ~ 9 0
5 2MASXI J0539223-292301 G 05 39 22.3 -29 23 01   14.91   13.95   ~ 5 0
6 ESO 205-3 Sy2 05 48 28.423 -47 45 31.76   15.60   14.21   ~ 23 0
7 ESO 488-34 EmG 05 49 27.120 -24 46 13.72   15.59   14.73   ~ 15 0
8 2MASS J05492787-2445168 IR 05 49 27.8584325033 -24 45 16.861177910   17.10       ~ 2 0
9 ESO 254-28 G 06 09 17.389 -44 43 18.98   15.14       ~ 8 0
10 AM 0642-645 G 06 42 33.1 -64 59 48           ~ 5 0
11 NGC 2403 AGN 07 36 51.396 +65 36 09.17 9.31 8.84 8.38 8.19   ~ 1608 1
12 AM 0748-665 G 07 48 38 -67 06.5           ~ 3 0
13 2MASX J07483930-6704419 G 07 48 39.306 -67 04 41.91   16.37       ~ 5 0
14 2MASX J07484444-6704359 G 07 48 44.5261333272 -67 04 35.587138844   18.01       ~ 2 0
15 NGC 3310 AGN 10 38 45.857 +53 30 11.89   12.45 12.15     ~ 726 1
16 ESO 376-27 G 10 56 58.2 -33 10 00   15.15   14.55   ~ 11 0
17 AM 1054-325 IG 10 56 58.5 -33 09 41           ~ 10 0
18 ESO 376-28 G 10 57 04.2239302927 -33 09 20.740160520   15.41   14.25   ~ 13 0
19 ESO 171-5 IG 12 01 36.178 -53 21 27.50   14.44   13.22   ~ 22 0
20 [WDF2000] AM 1208-273 C ? 12 10 41.1 -27 48 20           ~ 2 0
21 ESO 441-16 G 12 10 43.151 -27 48 55.24   16.08   14.80   ~ 7 0
22 ESO 381-5 G 12 40 32.703 -36 58 05.02   14.95   13.81 13.9 ~ 32 0
23 ESO 270-12 G 13 27 50.380 -43 25 47.05   15.48   14.75   ~ 11 0
24 NGC 5152 GiC 13 27 50.69 -29 37 08.0   13.32   11.90   ~ 37 0
25 NGC 5153 GiG 13 27 54.316 -29 37 04.84   13.29   11.78   ~ 62 0
26 LEDA 752558 G 13 56 11.4 -27 36 06           ~ 4 0
27 NAME the Dentist's Chair GiC 13 56 14.762 -27 35 55.28   15.83       ~ 13 0
28 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 2546 2
29 NAME Stephan's Quintet CGG 22 35 57.5 +33 57 36           ~ 375 1
30 NGC 7319 Sy2 22 36 03.602 +33 58 33.18   14.57 13.53 12.65   ~ 252 0
31 [WDF2000] AM 1324-431 B ? ~ ~           ~ 1 0
32 [WDF2000] AM 1324-431 A ? ~ ~           ~ 1 0
33 [WDF2000] AM 1237-364 B ? ~ ~           ~ 1 0
34 [WDF2000] AM 1237-364 A ? ~ ~           ~ 1 0
35 [WDF2000] AM 1159-530 A ? ~ ~           ~ 1 0
36 [WDF2000] AM 0642-325 A ? ~ ~           ~ 1 0
37 [WDF2000] AM 0547-474 C ? ~ ~           ~ 1 0
38 [WDF2000] AM 0547-474 B ? ~ ~           ~ 1 0
39 [WDF2000] AM 0547-474 A ? ~ ~           ~ 1 0
40 [WDF2000] AM 0547-244 C ? ~ ~           ~ 1 0
41 [WDF2000] AM 1237-364 C ? ~ ~           ~ 1 0

    Equat.    Gal    SGal    Ecl

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2020.07.13-01:09:16

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