Issue |
A&A
Volume 462, Number 2, February I 2007
|
|
---|---|---|
Page(s) | 575 - 579 | |
Section | Extragalactic astronomy | |
DOI | https://doi.org/10.1051/0004-6361:20047017 | |
Published online | 13 November 2006 |
Dust and CO emission towards the centers of normal galaxies, starburst galaxies and active galactic nuclei *,**
I. New data and updated catalogue
1
Instituto de Astronomía, Universidad Católica del Norte, Avenida Angamos 0610, Antofagasta, Chile e-mail: malbrecht@ucn.cl
2
Max-Planck-Institut für Radioastronomie (MPIfR), Auf dem Hügel 69, 53121 Bonn, Germany
3
Astronomisches Institut der Ruhr-Universität Bochum (AIRUB), Universitätsstr. 150 NA7, 44780 Bochum, Germany
Received:
6
January
2004
Accepted:
27
October
2006
Aims.The amount of interstellar matter in a galaxy determines its evolution, star
formation rate and the activity phenomena in the nucleus.
We therefore aimed at obtaining a data base of the line and
thermal dust emission within equal beamsizes for galaxies in a variety of
activity stages.
Methods.We have conducted a search for the (1–0) and (2–1)
transitions and the continuum emission at 1300 μm towards the centers of 88
galaxies using the IRAM 30 m telescope (MRT) and the Swedish ESO Submillimeter
Telescope (SEST).
The galaxies are selected to be bright in the far infrared
(
Jy) and optically fairly compact
(
).
We have applied optical spectroscopy and IRAS colours to group the galaxies of
the entire sample according to their stage of activity into three sub-samples:
normal, starburst and active galactic nuclei (AGN).
The continuum emission has been corrected for line contamination and synchrotron
contribution to retrieve the thermal dust emission.
For the latter we have determined the radio spectral indices of the individual
sources and extrapolated the synchrotron emission corresponding to our
millimeter beams to 1300 μm.
Results.We present new observational data for the (1–0)
and (2-1) transitions and the thermal dust emission at 1300 μm
for 88 galaxies.
In conjunction with our previous data, the new observations are used to compile
an updated catalogue for a total of 160 galaxies.
Key words: galaxies: abundances / galaxies: ISM / galaxies: spiral / radio continuum: galaxies / radio lines: galaxies
© ESO, 2007
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