A New Ultra-dense Group of Obscured Emission-Line Galaxies

Abstract

We present the discovery of an isolated compact group of galaxies that is extremely dense (median projected galaxy separation: 6.9 kpc), has a very low velocity dispersion (${\sigma }_{2D}$ = 67 km s${}^{-1}$), and where all observed members show emission lines and are morphologically disturbed. These properties, together with the lack of spirals and the presence of a prominent tidal tail make this group one of the most evolved compact groups.

15 pages,LaTeX, 2figures. A Postscript figure with spectra is available at ftp://astro.uibk.ac.at/pub/weinberger/ . Accepted for publication in ApJ Letters

References in corpus (6)

• Gasdynamics and Starbursts in Major Mergers
• QSO Metal Absorption Systems at High Redshift and the Signature of Hierarchical Galaxy Formation
• The Isolated Elliptical NGC 1132: Evidence For a Merged Group of Galaxies?
• The Nature of the Activity in Hickson Compact Groups of Galaxies
• Extented ionized gas emission and kinematics of the compact group galaxies in HCG 16: Signatures of mergers
• The Destruction of a Compact Group of Galaxies

Cited by in corpus (4)

• Candidate Tidal Dwarf Galaxies in the Compact Group CG J1720-67.8
• Interpreting the galaxy group CG J1720-67.8 through evolutionary synthesis models
• CG J1720-67.8: A Detailed Analysis of Optical and Infrared Properties of a New Ultracompact Group of Galaxies
• Dynamics and star formation activity of CG J1720-67.8 unveiled through integral field spectroscopy and radio observations