TY - JOUR

T1 - Tidally-triggered disk thickening .2. Results and interpretations

AU - Reshetnikov, V. P.

AU - Combes, F

PY - 1997/8

Y1 - 1997/8

N2 - We have reported in a previous paper (Paper I) B,V and I band photometric data for a sample of 24 edge-on interacting spiral galaxies, together with a control sample of 7 edge-on isolated galaxies. We discuss here the main result found in this study: the ratio h/z(0) of the radial exponential scalelength h to the constant scaleheight z(0) is about twice smaller for interacting galaxies. This is found to be due both to a thickening of the plane, and to a radial stripping or shrinking of the stellar disk. If we believe that any galaxy experienced a tidal interaction in the past, we must conclude that continuous gas accretion and subsequent star formation can bring back the ratio h/z(0) to higher values, in a time scale of 1 Gyr.

AB - We have reported in a previous paper (Paper I) B,V and I band photometric data for a sample of 24 edge-on interacting spiral galaxies, together with a control sample of 7 edge-on isolated galaxies. We discuss here the main result found in this study: the ratio h/z(0) of the radial exponential scalelength h to the constant scaleheight z(0) is about twice smaller for interacting galaxies. This is found to be due both to a thickening of the plane, and to a radial stripping or shrinking of the stellar disk. If we believe that any galaxy experienced a tidal interaction in the past, we must conclude that continuous gas accretion and subsequent star formation can bring back the ratio h/z(0) to higher values, in a time scale of 1 Gyr.

KW - galaxies, evolution, general, interactions, photometry, peculiar, spiral

KW - ON SPIRAL GALAXIES

KW - SURFACE PHOTOMETRY

KW - GALACTIC DISKS

KW - 3-DIMENSIONAL DISTRIBUTION

KW - LUMINOSITY DISTRIBUTIONS

KW - LIGHT

KW - MASS

KW - NGC-891

KW - MODEL

KW - COLOR

M3 - статья

VL - 324

SP - 80

EP - 90

JO - ASTRONOMY & ASTROPHYSICS

JF - ASTRONOMY & ASTROPHYSICS

SN - 0004-6361

IS - 1

ER -