2002A&A...384..780B


C.D.S. - SIMBAD4 rel 1.7 - 2021.01.21CET07:46:55

2002A&A...384..780B - Astronomy and Astrophysics, volume 384, 780-792 (2002/3-4)

Multicolor photometry of ten Seyfert 1 galaxies.

BORIS N.V., DONZELLI C.J., PASTORIZA M.G., RODRIGUEZ-ARDILA A. and FERREIRO D.L.

Abstract (from CDS):

We present new valuable BVI photometry of ten Seyfert 1 galaxies and narrow band Hα images for six of these objects. The results indicate that the distribution of the luminosity of the sample has an amplitude of almost 4 mag with an average of MB=-20.7. The observed morphologies are confined to early type galaxies. A barred structure is found in only 2 objects. Despite that early morphological types are dominant in this sample, integrated (B-V) colors are very blue. For instance, the SO galaxies show, on average, a (B-V)=0.78. This effect seems to be caused by the luminosity contribution of the active nucleus and/or the disk to the total luminosity of the galaxy. In the B band, the contribution of the active galactic nucleus to the total luminosity of the galaxy varies from 3% to almost 60% and the bulge to disk luminosity ratio (Lbulge/Ldisk) ranges from 0.6 to 22. Signs of tidal interactions seem to be a common characteristic since they are observed in 6 of the objects and one of them seems to be located in a poor cluster not yet identified in the literature. In contrast, Hα extended emission is rare, with only 1 galaxy showing clear evidence of it. Luminosity profile decomposition shows that the model Gauss + bulge + disk properly reproduces the surface brightness of the galaxies. However, in order to account for the luminosity profile, most of the disk galaxies need the inner truncated exponential form with a central cutoff radius ranging from 3 to 10 kpc. This is interpreted in terms of reddened regions that are well identified in the B-V color maps. These regions present very similar colors among them, with (B-V)∼1.2. This fact could be associated with the presence of dust confined in the inner regions of the galaxies.

Abstract Copyright:

Journal keyword(s): galaxies: photometry - galaxies: active - galaxies: Seyfert

Simbad objects: 10

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Number of rows : 10

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 2MASX J00005351-4439336 Sy1 00 00 53.5070855761 -44 39 33.478937904   17.19       ~ 13 0
2 ESO 354-4 Sy1 01 51 41.8591682152 -36 11 16.265166433   14.45 14.44 13.36   ~ 40 0
3 ESO 25-2 Sy1 18 54 40.2652126773 -78 53 54.100902388   14.60 14.5 13.08 13.9 ~ 47 0
4 2MAXI J1937-060 Sy1 19 37 33.0246221231 -06 13 04.813344527   16.12 15.35 8.8   ~ 127 1
5 2MAXI J1936-513 Sy1 19 38 04.3956866963 -51 09 49.387640705   15.67 15.20 14.78   ~ 37 0
6 Mrk 509 Sy1 20 44 09.7504131334 -10 43 24.724854084   13.35 13.12 10.7   ~ 1145 0
7 2MASX J21090996-0940147 Sy1 21 09 09.9697758808 -09 40 14.756149856   14.95 14.39 12.7   ~ 84 0
8 2MAXI J2131-334 Sy1 21 32 02.2033285165 -33 42 53.778237797 15.85 16.92 15.66 15.47   ~ 55 0
9 ESO 602-31 Sy1 22 36 55.9466233855 -22 13 15.037420126   14.33 13.90 13.41   ~ 35 0
10 2MASX J22555187-2944153 Sy1 22 55 51.8895275816 -29 44 15.495275886   16.41   15.12   ~ 15 0

    Equat.    Gal    SGal    Ecl

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2021.01.21-07:46:55

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