Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...278..351r&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 278, no. 2, p. 351-363
Astronomy and Astrophysics
Astrophysics
14
Brightness Distribution, Disk Galaxies, Elliptical Galaxies, Galactic Bulge, Interacting Galaxies, Spiral Galaxies, Thickness, Astronomical Photometry, Charge Coupled Devices, Morphology, Radial Velocity, Red Shift, Star Formation, Stellar Luminosity, Virgo Galactic Cluster
Scientific paper
We present the results of a detailed photometric study in the RC band of 73 galaxies in close interacting systems. The sample for this study was selected mainly from the Atlas of Peculiar Galaxies by Arp on the basis of the optical morphology of galaxies. The observed systems exhibit: an excess of early type spirals (Sa) and deficiency of late type ones (Sm/Irr), and excess of brighter galaxies as compared with field galaxies. From the decomposition of the equivalent profiles we found the following principal results: (a) Interacting ellipticals and bulges of SO galaxies are systematically displaced in the plane mue - Re from the relation for normal galaxies. This displacement may be explained in terms of bulges of interacting galaxies being more compact. (b) Bulges of interacting spirals are located in the effective parameters plane in the same region of bulges of non-interacting galaxies. (c) Disks of strongly interacting spirals are 2-3 times thicker as compared with disks of normal galaxies. (d) The central surface brightnesses (mu0 of the disks of interacting galaxies are, on average, brighter than for field spirals. (e) There is no clear dependence of the global photometric characteristics of galaxies on the interaction strength. There is a weak tendency for galactic disks to be slightly brighter and shorter than in strongly interacting systems.
Hagen-Thorn Vladimir A.
Reshetnikov V. P.
Yakovleva V. A.
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