1999A&A...344..421M


Query : 1999A&A...344..421M

1999A&A...344..421M - Astronomy and Astrophysics, volume 344, 421-432 (1999/4-2)

Effects of interaction on the properties of spiral galaxies. II. Isolated galaxies: The zero point.

MARQUEZ I. and MOLES M.

Abstract (from CDS):

We analyse the properties of a sample of 22 bright isolated spiral galaxies on the basis of Johnson B,V,I images and optical rotation curves. The fraction of early morphological types in our sample of isolated galaxies (or in other samples of non-interacting spiral galaxies) appears to be smaller than in samples including interacting systems. The overall morphological aspect is regular and symmetric, but all the galaxies present non-axisymmetric components in the form of bars or rings. We find that the color indices become bluer towards the outer parts and that their central values are well correlated with the total colors. The properties of the bulges span a larger range than those of the disks, that thus are more alike between them. None of the galaxies shows a truncated, type II disk profile. It is found that the relation between surface brightness and size for the bulges, the Kormendy relation, is tighter when only isolated galaxies are considered. We find a similar relation for the disk parameters with an unprecedented low scatter. A Principal Component Analysis of the measured parameters shows that 2 eigenvectors suffice to explain more than 95 % of the total variance. These are, as found for other samples including spiral galaxies in different environmental situations, a scale parameter given by the mass or, equivalently, the luminosity or the size; and a form parameter given by the bulge to disk luminosity ratio, B/D, or, equivalently, by the gradient of the solid-body rotation region of the rotation curve, the G-parameter. We report here a tight correlation between G and B/D for our sample of isolated spirals that could be used as a new distance indicator.

Abstract Copyright:

Journal keyword(s): galaxies: fundamental parameters - galaxies: interactions - galaxies: kinematics and dynamics - galaxies: photometry - galaxies: spiral - galaxies: structure

Simbad objects: 9

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Number of rows : 9
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NGC 450 H2G 01 15 30.4565036568 -00 51 39.125259576   13.4   13.3 13.2 ~ 216 0
2 UGC 807 GiP 01 15 35.0249966112 -00 50 52.339218000   13.0       ~ 37 0
3 NGC 718 GiC 01 53 13.2842245224 +04 11 44.843164296   12.52 11.67 11.10 10.29 ~ 146 0
4 UGC 3511 GiG 06 43 41.8670332224 +65 12 22.867129224   13.0       ~ 37 0
5 UGC 3804 GiG 07 22 34.7529993480 +71 35 56.174136504   13.0       ~ 57 0
6 NGC 3835 Sy2 11 44 04.8840642240 +60 07 11.209037700   13.0       ~ 68 0
7 NGC 4525 LSB 12 33 51.1345197048 +30 16 38.774676108   13.0       ~ 107 0
8 NGC 6155 EmG 16 26 08.3352615552 +48 22 00.410482092   13.20       ~ 97 1
9 NGC 6395 GiG 17 26 31.289 +71 05 46.54   12.8       ~ 61 0

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2022.05.20-19:25:07

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