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H. M. Tovmassian H. Tiersch G. H. Tovmassian S. Neizvestny J. P. Torres‐Papaqui A. G. Pramskij 《Astronomische Nachrichten》2005,326(5):362-369
In the course of investigation of Shakhbazian compact groups we studied the group ShCG 191 which has been identified also as the Abell cluster A1097. By its richness it may be classified as a rich compact group or a poor cluster. We determined redshifts of 14 objects in the area of the cluster and found that two of the supposed members of the group are stars. Redshifts of 12 galaxies show that the system is gravitationally bound. The V and R magnitudes of 23 member galaxies and their morphological types are determined. We present in this paper also the surface brightness contours of member galaxies in the central area of the cluster, the curves of isophotal twisting and the Fourier parameter a4. It is shown that some galaxies in the cluster are interacting with each other. Physical parameters of the group are close to those of ShCGs. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) 相似文献
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H. M. Tovmassian S. G. Navarro G. H. Tovmassian L. J. Corral 《Astrophysics and Space Science》1995,224(1-2):577-578
TheIRAS colours of some B stars with anomalous UV extinction confirm that they have circumstellar dust. 相似文献
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By observations at Calar Alto (Spain), La Silla (Chile) and Cananea (Mexico), we measured redshifts of 108 candidate members
in 19 Shakhbazian compact galaxy groups ShCG 44, 105, 149, 168, 270, 276, 278, 279, 298, 303, 304, 310, 317, 331, 339, 340,
345, 358, and 359. Redshifts of another ten members were taken from the NED. We found that nine out of 118 candidate member
galaxies are stars, and twelve galaxies are not members of the corresponding groups and are projected over them. The group
ShCG 168 is the core of a cluster. The groups ShCG 276, ShCG 298, and ShCG 303 are either strongly contaminated by field galaxies
with redshift differing not very much from that of the corresponding group, or are the results of a chance projection of field
galaxies. 相似文献
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By observations with the 1.5m telescope at San Pedro Martir (OAN, UNAM, Mexico) the BVR magnitudes are determined for 66 member
galaxies in Shakhbazian Compact Galaxy Groups ShCG 40, ShCG 176, ShCG 270, ShCG 278, ShCG 310, and ShCG 342. Three other groups
were observed in two or only in one band. Seven galaxies in ShCG 298 were observed in B and R, six galaxies in ShCG 95 were
observed in V, and seven galaxies in ShCG 345 were observed in V and R. The distribution of brightness of observed galaxies
is determined. Signs of interaction between galaxies are detected in some groups. 相似文献
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H. M. Tovmassian R. Kh. Hovhannessian R. A. Epremian 《Astrophysics and Space Science》1994,213(2):175-183
Using the results of observations of the Carina nebula made with the space telescope Glazar, it is shown that the extinction law for the nebula is abnormal and that there is a single OB star complex within the nebula at a distance of about 2200 pc. It is suggested that the observed distribution of OB stars in the nebula and also the appearance of the nebula itself is due to a specific structure of the absorbing clouds within the nebula, and that the absorbing clouds may have such structure as a result of an explosion in the center of the nebula. 相似文献