1997A&A...326..537D


C.D.S. - SIMBAD4 rel 1.7 - 2020.03.31CEST16:32:52

1997A&A...326..537D - Astronomy and Astrophysics, volume 326, 537-553 (1997/10-2)

Gas segregation in the interacting system Arp 105.

DUC P.-A., BRINKS E., WINK J.E. and MIRABEL I.F.

Abstract (from CDS):

Arp 105 is an example of a collision between an infrared luminous spiral (NGC 3561A) and an elliptical (NGC 3561B) galaxy in a cluster of galaxies. Duc & Mirabel (1994A&A...289...83D) reported in this system the genesis of star-forming tidal dwarf galaxies at the ends of the tidal tails emanating from the spiral. In this paper, the gas distribution in Arp 105 is analyzed based on HI and 12CO(1-0) emission, mapped with the Very Large Array and the Plateau de Bure interferometers. The observations reveal an extreme segregation between the atomic and molecular gas distributions. HI clouds as massive as 6x109M are found along the tidal tails and are associated with the dwarf galaxies at their tip; the spiral disk itself contains less than 5x107M of HI. About 1010M of molecular gas is concentrated in the central 3kpc region of the spiral. Towards the elliptical, HI is seen in absorption. The shape of the absorption line suggests inflow and capture of gas by the giant galaxy. Arp 105 thus shows direct evidence of mass transfer between a spiral and an elliptical. All these phenomena are interpretated as a direct consequence of the interaction between NGC 3561A and B. A study of the dynamics of the system reveal that the HI in the northern tail is composed of two individual components, one along the optical tail, and a second one, kinematically decoupled, which shows signs of rotation. Indications of rotation are also seen in Hα in the tidal object at the tip of the southern tail. These observations show that these tidal dwarf galaxies might have already acquired dynamical independence.

Abstract Copyright:

Journal keyword(s): galaxies: individual: Arp 105 - galaxies: interactions - galaxies: formation - galaxies: ISM - galaxies: kinematics and dynamics - radio lines: galaxies

Nomenclature: Table 5: [DBW97] HHMMSS.s+DDMMSS N=3.

Status at CDS:  

CDS comments: APG 105S is defined as a Tidal dwarf Galaxy in 2000Natur.403..867B as [BLD2000] A105S.

Simbad objects: 20

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Number of rows : 20

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 3C 84 Sy2 03 19 48.1597607660 +41 30 42.114155434   13.10 12.48 11.09   ~ 3508 3
2 ICRF J092703.0+390220 Sy1 09 27 03.0139516273 +39 02 20.847968628   17.17 17.00 16.486   ~ 924 1
3 ACO 1185 ClG 11 10 31.4 +28 43 39           ~ 242 1
4 QSO B1108+2857 QSO 11 11 08.3995630437 +28 41 35.385335677   20.31 20.23     ~ 25 0
5 VV 237e GiG 11 11 12.725 +28 42 46.92           ~ 5 0
6 NVSS J111112+284243 rG 11 11 13.0419775539 +28 42 42.744633151   14.7       ~ 66 1
7 NGC 3561 LIN 11 11 13.2 +28 41 47   14.7       ~ 188 2
8 NAME Ambartsumian's Knot G 11 11 13.424 +28 41 16.17   18.5       ~ 12 2
9 [BLD2000] A105S G 11 11 13.5 +28 41 20           ~ 10 2
10 [DBW97] 110841.8+285340 HI 11 11 23.5 +28 37 21           ~ 1 0
11 [DBW97] 110849.1+285445 HI 11 11 30.8 +28 38 27           ~ 1 0
12 [DBW97] 110853.6+290050 HI 11 11 35.3 +28 44 31           ~ 1 0
13 7C 115344.10+314447.00 Sy2 11 56 18.7446774080 +31 28 04.674314160   19.33 18.96     ~ 123 1
14 Ton 599 QSO 11 59 31.83390975 +29 14 43.8268741   14.80 14.41 17.652 13.39 ~ 785 1
15 NGC 4438 LIN 12 27 45.652 +13 00 30.92 11.37 11.02 10.17     ~ 571 3
16 3C 273 BLL 12 29 06.6996828061 +02 03 08.598846466   13.05 14.830 14.11   ~ 5280 1
17 NGC 4654 GiP 12 43 56.638 +13 07 34.86   11.8       ~ 496 1
18 3C 286 Sy1 13 31 08.2885060664 +30 30 32.960825108   17.51 17.25     ~ 3671 1
19 4C 09.57 BLL 17 51 32.81857318 +09 39 00.7284829   17.46 16.78 15.57   ~ 803 1
20 NGC 7252 IG 22 20 44.7751096408 -24 40 41.905677809 12.26 12.46 12.06 11.57   ~ 660 1

    Equat.    Gal    SGal    Ecl

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2020.03.31-16:32:52

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