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AGN populations in compact groups of galaxies

Published online by Cambridge University Press:  25 July 2014

A. S. Amirkhanian ,
A. del Olmo ,
A. G. Egikian ,
H. Tiersch ,
D. Stoll  and
J. Perea
A. S. Amirkhanian
Affiliation:
Byurakan Astrophysical Observatory, Aragatzotn Province, Armenia
A. del Olmo
Affiliation:
Instituto de Astrofisica de Andalucia, Granada, Spain
A. G. Egikian
Affiliation:
Byurakan Astrophysical Observatory, Aragatzotn Province, Armenia
H. Tiersch
Affiliation:
Sternwarte Koenigsleiten, Muenchen, Germany
D. Stoll
Affiliation:
Sternwarte Koenigsleiten, Muenchen, Germany
J. Perea
Affiliation:
Instituto de Astrofisica de Andalucia, Granada, Spain
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Abstract

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Compact groups of galaxies (CGG) have revealed some interesting problems from their origin and lifetime to the evolution of their members in such dense configurations. Some authors suppose that CGG probably are the best location for AGNs in the local Universe. According to our preliminary data about 7–10% of member galaxies in Shahbazian compact groups (SHCGs) are emission-line galaxies including the broad-line AGN and the narrow emission-line galaxies. Shahbazian 355/4 is a classical Seyfert 1 galaxy at the same redshift as host group. Moreover Shahbazian 278/4 is also a broad-line AGN in an early-type galaxy. This is the first emission-line object in SHCGs. Meanwhile there is no Seyfert 1 galaxy among the spectroscopically investigated galaxies in the South compact groups, although more than 70% of the member galaxies in these groups probably have an active nucleus. The UZC- compact groups have an excess of Seyfert 2s (but not Seyfert 1s!). Further observational studies are necessary to understand such and many other questions related to the puzzle of CGG.

Keywords

Shahbazian groupsAGNStarburst galaxies
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S304: Multiwavelength AGN Surveys and Studies , October 2013 , pp. 337 - 338
Copyright
Copyright © International Astronomical Union 2014 

References

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