2011A&A...529A.157W


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.08CEST03:15:37

2011A&A...529A.157W - Astronomy and Astrophysics, volume 529A, 157-157 (2011/5-1)

A first study of the galaxy HRG 2304 and its companion 6dFGS gJ165439.3-800411.

WENDEROTH E., FAUNDEZ-ABANS M., KRABBE A.C., DE OLIVEIRA-ABANS M. and CUEVAS H.

Abstract (from CDS):

We report the first study of the peculiar ring-like galaxy HRG 2304 (NED02), which was previously classified as a ring galaxy with an elliptical smooth ring. This object was selected to prove that it is a candidate for the Solitaire-type ring galaxies in an early stage of ring formation. The main goal of this work is to provide the spectral characteristics of the current object and its companion AM 1646-795 (NED01). The study is based on spectroscopic observations in the optical band to highlight the characteristics of this interacting galaxy. To investigate the star formation history of HRG 2304 we used the stellar population synthesis code STARLIGHT. The direct V and B broad band images were used to enhance some fine structures. Along the entire long-slit signal, the spectra of HRG 2304 and its companion resemble that of an early-type galaxy. We estimated a heliocentric systemic redshift of z=0.0415, corresponding to heliocentric velocities of 12449km/s for HRG 2304 (NED02) and 12430km/s for AM1646-795 (NED01). The spatial variation in the contribution of the stellar population components for both objects are dominated by an old stellar population 2x109<t≤13x109yr. The observed radial-velocity distribution and the fine structures around HRG 2304 suggest an ongoing tidal interaction of both galaxies. The spectroscopic results and the morphological peculiarities of HRG 2304 can be adequately interpreted as an ongoing interaction with the companion galaxy. Both galaxies are early-type, the companion is elliptical, and the smooth distribution of the material around HRG 2304 and its off-center nucleus in the direction of AM1646-795 (NED01) characterize HRG 2304 as a Solitaire-type galaxy candidate in an early stage of ring formation.

Abstract Copyright:

Journal keyword(s): galaxies: individual: HRG 2304 - methods: observational - techniques: spectroscopic - galaxies: interactions - galaxies: general - galaxies: peculiar

Nomenclature: Table 1: [WFK2011] JHHMMSS.ss+DDMMSS.ss N=2.

CDS comments: Table 1 GSC 094100288 is a misprint for GSC 09451-00228.

Simbad objects: 14

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Number of rows : 14

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 NGC 985 Sy1 02 34 37.882 -08 47 17.02   14.64 14.28 12.9   ~ 345 0
2 2MASX J04374542-4717339 G 04 37 45.4116629838 -47 17 33.516813754   16.80   15.57   ~ 6 0
3 ESO 251-14 G 04 37 46.0047807105 -47 15 11.926590890   15.16   14.10   ~ 15 0
4 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14826 1
5 2MASX J16542367-8003537 G 16 54 23.7 -80 03 54           ~ 1 0
6 [WFK2011] J165437.56-800423.99 * 16 54 37.560 -80 04 23.99           ~ 1 0
7 2MASX J16543910-8004109 G 16 54 39.2894752394 -80 04 11.376431637   16.57   15.25   ~ 5 0
8 [WFK2011] J165439.92-800351.77 * 16 54 39.920 -80 03 51.77           ~ 1 0
9 2MFGC 13532 G 16 54 40.04 -80 03 47.4           ~ 5 0
10 GSC 09451-00228 * 16 54 40.6376025427 -80 03 44.193793300   15.04 13.93 13.91   ~ 1 0
11 2MASX J16553050-8005482 G 16 55 30.6394242491 -80 05 48.222277754   15.79   14.90   ~ 9 0
12 ESO 46-10 G 20 26 31.4 -72 36 35           ~ 8 0
13 2MASX J21490854-5418135 GiP 21 49 08.5404214501 -54 18 13.884672836   16.45   15.33   ~ 11 0
14 ESO 189-2 PaG 21 49 09 -54 18.0           ~ 11 0

    Equat.    Gal    SGal    Ecl

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2020.07.08-03:15:37

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