Shakhbazian compact galaxy groups^*

III. Photometric and spectroscopic study of ShCG 181, ShCG 344, ShCG 361, and ShCG 362

¹ Instituto Nacional de Astrofísica Optica y Electrónica, AP 51 y 216, CP 72000, Puebla, Pue., México e-mail: vahram@inaoep.mx
² Sternwarte Königsleiten, 81477, München, Leimbachstr. 1a, Germany e-mail: tiersch@uni.de
³ IAC, Tenerife, Spain e-mail: silvana@ll.iac.es
⁴ OAN, UNAM, Ensenada, BC, México e-mail: gag@astrosen.unam.mx
⁵ Special Astrophysical Observatory, RAS, Nizhny Arkhyz, Russia e-mail: neiz@sao.ru

Corresponding author: H. M. Tovmassian, hrant@inaoep.mx

Received: 31 March 2003
Accepted: 21 October 2003

Abstract

In 1995 we commenced a detailed spectral and photometric study of Shakhbazian compact groups. In this paper the results on groups ShCG 181, ShCG 344, ShCG 361, and ShCG 362 are presented. The redshifts of member galaxies in groups and the radial velocity dispersions, the results of the surface photometry in BVR, the profiles of the surface brightness versus semi-major axis a (or and the twisting position angle versus semi-major axis of galaxies, virial masses, luminosities and mass-to-luminosity ratios, and the crossing times of groups are given. It is shown that some members of groups are in the process of interaction. On the basis of the results obtained in this and previous works, the general properties of thirteen ShCGs are discussed.