2006A&A...446..447R


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.17CEST13:30:18

2006A&A...446..447R - Astronomy and Astrophysics, volume 446, 447-458 (2006/2-1)

AM 1934-563: a giant spiral polar-ring galaxy in a triplet.

RESHETNIKOV V., BOURNAUD F., COMBES F., FAUNDEZ-ABANS M. and DE OLIVEIRA-ABANS M.

Abstract (from CDS):

We have observed the emission-line kinematics and photometry of a southern triplet of galaxies. The triplet contains a giant spiral galaxy AM 1934-563 whose optical structure resembles a polar-ring galaxy: a distorted spiral disk, seen almost edge-on, and a faint large-scale (45kpc in diameter) warped structure, inclined by 60°-70° with respect to the disk major axis. The triplet shows a relatively small velocity dispersion (69km/s) and a large crossing time (0.17 in units of the Hubble time). The disk of AM 1934-563 demonstrates optical colors typical of early-type spirals, a strong radial color gradient, and almost exponential surface brightness distribution with an exponential scale-length value of 3.1kpc (R passband). The galaxy shows a maximum rotation velocity of about 200km/s and it lies close to the Tully-Fisher relation for spiral galaxies. The suspected polar ring is faint (µ(B)≥24) and strongly warped. Its total luminosity comprises 10-15% of the total luminosity of AM 1934-563. We model this system using numerical simulations, and study its possible formation mechanisms. We find that the most robust model that reproduces the observed characteristics of the ring and the host galaxy is the tidal transfer of mass from a massive gas-rich donor galaxy to the polar ring. The physical properties of the triplet of galaxies are in agreement with this scenario.

Abstract Copyright:

Journal keyword(s): galaxies: individual: AM 1934-563 - galaxies: interaction - galaxies: formation - galaxies: structure

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 - 2021
#notes
1 NGC 488 GiG 01 21 46.848 +05 15 24.19   15.0       ~ 282 0
2 NGC 660 Sy2 01 43 02.350 +13 38 44.45   12.02 11.16     ~ 522 2
3 NGC 3245 GiP 10 27 18.3853542210 +28 30 26.626222848   11.6       ~ 320 0
4 ESO 322-69 GiG 12 44 49.0359408961 -40 42 51.693581748   14.12 13.58 13.29 13.9 ~ 188 0
5 NGC 4772 LIN 12 53 29.1636622578 +02 10 06.133021648 12.29 11.96 11.04     ~ 226 1
6 Mrk 829 GiP 14 50 56.495 +35 34 18.27   14.5 14.83     ~ 195 0
7 UGC 9562 GiP 14 51 14.3970867139 +35 32 32.933386615   14.2       ~ 149 0
8 APG 293 G 16 58 27.8 +58 56 48           ~ 113 0
9 NGC 6286 GiG 16 58 31.381 +58 56 10.21   14.2       ~ 169 1
10 LEDA 400092 G 19 38 31.6 -56 26 36           ~ 4 1
11 2MASX J19383862-5629223 G 19 38 38.6090822853 -56 29 22.466893204   16.05   15.05   ~ 7 1
12 AM 1934-563 G 19 38 39 -56 27.3           ~ 13 1

    Equat.    Gal    SGal    Ecl

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2021.04.17-13:30:18

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