TY - JOUR

T1 - A PHOTOMETRIC-STUDY OF INTERACTING GALAXIES .2. ANALYSIS OF THE RESULTS

AU - RESHETNIKOV, VP

AU - HAGENTHORN, VA

AU - YAKOVLEVA, VA

PY - 1993/11

Y1 - 1993/11

N2 - We present the results of a detailed photometric study in the R(c) 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 mu(e)-R(e) 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.

AB - We present the results of a detailed photometric study in the R(c) 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 mu(e)-R(e) 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.

KW - GALAXIES, INTERACTIONS

KW - GALAXIES, KINEMATICS AND DYNAMICS

KW - GALAXIES, PHOTOMETRY

KW - GALAXIES, STRUCTURE

KW - BRIGHTEST CLUSTER MEMBERS

KW - CCD SURFACE PHOTOMETRY

KW - POLAR-RING GALAXIES

KW - ON SPIRAL GALAXIES

KW - TO-DISK RATIOS

KW - ELLIPTIC GALAXIES

KW - BINARY GALAXIES

KW - SEYFERT-GALAXIES

KW - NUCLEAR ACTIVITY

KW - GALACTIC DISKS

M3 - статья

VL - 278

SP - 351

EP - 363

JO - ASTRONOMY & ASTROPHYSICS

JF - ASTRONOMY & ASTROPHYSICS

SN - 0004-6361

IS - 2

ER -