Optical observations of a newly identified compact galaxy group near the Zone of Avoidance

Details Optical observations of a newly identified compact galaxy group near the Zone of Avoidance Optical observations of a newly identified compact galaxy group near the Zone of Avoidance

Publishing date

2002-10-23

URL

arxiv.org/abs/astro-ph/0210510v1

Journals

Astron.Astrophys. 398 (2003) 13-22

Science

Astronomy and Astrophysics

Field

Astrophysics

Additional info

17 pages, 5 figures out of which 4 are in jpg format. A postscript version of the paper including all figures is available at:

Type

Scientific paper

Digital Object Identifier

10.1051/0004-6361:20021636

Abstract

We have identified a new group of galaxies, CG J0247+44.9, at low Galactic latitude (l=143.64 deg, b=-13.29 deg), which satisfies Hickson's criteria (Hickson 1997) for Compact Groups (CGs). Our group consists of six members, two of which are in close interaction (IRAS 02443+4437). We present here optical photometry (BVRI) and low resolution spectroscopy of the individual galaxies and investigate the global properties of the group. Our morphological analysis reveals that two out of the six objects are lenticular galaxies. The others are spirals showing emission lines in their spectra through which we could classify them as a starburst galaxy (the spiral member of the IRAS 02443+4437 close pair), a Seyfert 2, a LINER and a weak H II galaxy. Since the S0/Sa is the prevailing morphology for the galaxies of this group, which is also characterized by a short crossing time and a relatively high velocity dispersion, we suggest that CG J0247+44.9 is a dynamically old compact group.

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