H. M. Tovmassian,1 H. Tiersch,2 G. H. Tovmassian,3 V. H. Chavushyan,1 S. G. Navarro,4 S. Neizvestny,5 and J. P. Torres-Papaqui1
1 Instituto Nacional de Astrofísica, Óptica y Electrónica, Apartados Postales 51 y 216, 72000 Puebla, Pue., México (hrant@inaoep.mx; vahram@inaoep.mx; papaqui@inaoep.mx).
2 Sternwarte Königsleiten, 81477, München, Leimbachstr. 1a, Germany (htiersch@uni.de).
3 Observatorio Astronómico Nacional, Instituto de Astronomía, UNAM, 22800 Ensenada, B. C., México (gag@astrosen.unam.mx).
4 Instituto de Astrofísica de Canarias, Vía Láctea, 38200 La Laguna, Tenerife, Spain (silvana@ll.iac.es).
5 Special Astrophysical Observatory RAS, Nizhnij Arkhyz, Karachai-Cherkessia, 357147 Russia (neiz@sao.ru).
]]> Received 2004 August 2
Accepted 2004 October 8.
RESUMEN
Continuamos con la presentación de los resultados de estudio espectroscópico y fotométrico de grupos compactos de galaxias Shakhbazian. Estos son una interesante clase de grupos. Por su gran numero (el catálogo contiene 377 grupos) podemos estudiarlos en sus diferentes etapas de evolución. En este artículo mostramos los resultados de un estudio detallado de cinco grupos ShCG 74E, ShCG 74W, ShCG 188, ShCG 251 y ShCG 348. Damos a conocer los corrimientos al rojo de cada galaxia en el grupo, los resultados de la fotometría R, los isocontornos de brillo superficial, las masas estimadas, las luminosidades y las razones masa-luminosidad de los grupos, además de algunos parámetros dinámicos como la dispersión de velocidad radial y el tiempo de cruce, así como propiedades generales de 18 grupos ShCGs obtenidas en este trabajo y en artículos previos.
ABSTRACT
We continue the presentation of the results of detailed spectroscopic and photometric study of Shakhbazian compact galaxy groups. They belong to the interesting class of compact groups. Because of their large number (the catalogue contains 377 entries) we are able to study the groups in different stages of evolution. Here we give the results of a detailed study of five groups, ShCG 74E, ShCG 74W, ShCG 188, ShCG 251, and ShCG 348. We present the redshifts of individual galaxies in groups, the results of the surface photometry in R, the contour plots of the surface brightness, and some physical parameters of groups, such as the radial velocity dispersions, the crossing times, and the mass-to-luminosity ratios of groups. The general properties of 18 ShCGs obtained in this and previous works are discussed.
Key Words: Galaxies: Clusters: Individual (SHCG 74, SHCG 188, SHCG 251, SHCG 348 — Galaxies: Distances and redshifts — Galaxies: Interactions — Galaxies: Photometry.
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ACKNOWLEDGMENTS
The authors thank the anonymous referee for a careful reading of the manuscript and valuable comments. HMT acknowledges the Konigsleiten Observatory for partial financial support (accommodation) during July 2004. HT is grateful to the Government of the Land Brandenburg for the support of this work (Az 24-19/003; 2000), to the DFG for the grant TI 215/6-3, 444MEX111/1/98. HT and SN are grateful to Mr. O. Beck for private financial support.
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