Issue |
A&A
Volume 507, Number 2, November IV 2009
|
|
---|---|---|
Page(s) | 757 - 768 | |
Section | Extragalactic astronomy | |
DOI | https://doi.org/10.1051/0004-6361/200912546 | |
Published online | 15 September 2009 |
H I in nearby low-luminosity QSO host galaxies
1
I. Physikalisches Institut, Universität zu Köln, Zülpicher Strasse 77, 50937 Köln, Germany e-mail: skoenig@ph1.uni-koeln.de
2
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
Received:
20
May
2009
Accepted:
2
September
2009
We searched for 21 cm emission in a sample of 27 previously CO detected nearby galaxies hosting low-luminosity
quasi - stellar objects (QSOs). In this paper we investigate the relationship between the
and infrared properties of
these host galaxies, compare the atomic and molecular gas content and look for connections to the optical and FIR properties. The
single dish observations have been made with the Effelsberg 100-m telescope with a beam size of 9.5´. The sample objects have been drawn from a wide-angle survey for optically bright QSOs (HES), which have declinations
and redshifts up to
. 12 host galaxies from the sample have been detected in the
21 cm emission line. Eight of them have a spiral geometry, whereas the other four are bulge dominated and probably of elliptical type (E/S0). Three of the objects seem
to be in a phase of merging/interaction. The neutral atomic gas masses range from
up to
. The median
gas mass in the whole sample is of the order of
, which is a factor of two higher than the
content of our galaxy. We find
no strong correlation between
mass and IR luminosity. The objects agree well within the expectations from the Tully-Fisher
relation. In the color–color diagram we find all sources in the estimated locations. With the non-detected sources we clearly sample
an upper envelope of this mass distribution.
Key words: galaxies: active / radio lines: galaxies / galaxies: nuclei / galaxies: Seyfert
© ESO, 2009
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