2000MNRAS.319..977W

Query : 2000MNRAS.319..977W

2000MNRAS.319..977W - Mon. Not. R. Astron. Soc., 319, 977-990 (2000/December-3)

0422-476: a shell galaxy with azimuthally distributed shells.

WILKINSON A., PRIEUR J.-L., LEMOINE R., CARTER D., MALIN D. and SPARKS W.B.

Abstract (from CDS):

A morphological and two-colour charge-coupled device photometry study of the shell galaxy 0422-476, one of the richest known azimuthally distributed shell galaxies, is presented. Taking this galaxy as a prototype, a general method for reducing observational data of these objects is defined and quantitative parameters for use in further theoretical studies are derived.

According to some recent models (e.g. that of Thomson and Wright in 1990), the shells in such a galaxy could be density waves induced in a thick disc population of dynamically cold stars by a weak interaction with another galaxy. In 0422-476 there is no evidence of either a conventional exponential disc or a thick disc. Although it is not possible to rule out the weak interaction model, the observations continue to favour the merger model (e.g. that of Quinn from 1984).


Abstract Copyright: 2000, Royal Astronomical Society

Journal keyword(s): galaxies: evolution - galaxies: individual: 0422-476 - galaxies: interactions - galaxies: photometry

Simbad objects: 10

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Number of rows : 10
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 470 GiP 01 19 44.8526263032 +03 24 36.027176544 12.63 12.53 11.78     ~ 287 1
2 NGC 474 GiP 01 20 06.6870520512 +03 24 55.861973100 12.75 12.37 11.51 11.42 10.56 ~ 371 1
3 ESO 202-12 AG? 04 22 50.4058657392 -47 38 11.180197392   16.06       ~ 18 0
4 ESO 202-15 GiG 04 24 21.0331608288 -47 31 35.189281596   13.62   12.26   ~ 36 0
5 NGC 2865 GiG 09 23 30.205 -23 09 41.37   12.39 11.43 11.06   ~ 244 0
6 NGC 3018 GiP 09 49 41.3902270344 +00 37 15.872189664   14.13       ~ 59 1
7 NGC 3051 EmG 09 53 58.6267400544 -27 17 11.030999676   12.79 15.0     ~ 55 0
8 NGC 3923 GiG 11 51 01.783 -28 48 22.36 11.41 10.59 9.80 8.88   ~ 459 1
9 NAME Centaurus A BLL 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4774 3
10 NGC 7600 AG? 23 18 53.8425354720 -07 34 49.679666040   13   11.68   ~ 74 0

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