Issue |
Astron. Astrophys. Suppl. Ser.
Volume 126, Number 2, December I 1997
|
|
---|---|---|
Page(s) | 197 - 236 | |
DOI | https://doi.org/10.1051/aas:1997389 | |
Published online | 15 December 1997 |
Molecular gas in the Galactic center region
I. Data from a large scale
(J = 1
0) survey
1
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
2
Physics Department, Queen Mary & Westfield College, University of London, Mile End Road, London E1 4NS, UK
3
Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, U.S.A.
4
Radioastronomisches Institut, Universität Bonn, Auf dem Hügel 71, 53121 Bonn, Germany
5
Steward Observatory, University of Arizona, Tucson, AZ 85721, U.S.A.
6
Departamento de Astronomía, Universidad de Chile, Casilla 36-D, Santiago de Chile, Chile
7
Swedish-ESO Submillimetre Telescope, European Southern Observatory, Casilla 19001, Santiago de Chile 19, Chile
Send offprint request to: S. Hüttemeister, Radioastrono-misches Institut, Universität Bonn, Germany.
Received:
1
July
1996
Accepted:
24
February
1997
A large scale survey of the Galactic center region in the
(
) transition is presented. This survey
was obtained with the 1.2 m Southern Millimeter-Wave Telescope (SMWT)
at the Cerro Tololo Interamerican Observatory (CTIO) near La Serena,
Chile. It covers the region
and
with a grid spacing of 9,
i.e. the sampling is at full FWHP beamwidth. 357 positions were in
total observed. After reviewing the instrumentation of the 1.2 m SMWT,
the observing techniques, and the methods used in the data reduction,
the data of the survey are presented and morphologically described. In
addition, data of the HNCO(
) line are
presented, which was also included in the large bandwidth of the
spectrometer.
measurements performed for
comparison purposes are presented and compared with other 12CO
results. The maps of the
survey demonstrate
that there are great differences between the distribution of the
optically thin
emission and the usually
optically thick
emission.
Key words: telescopes / surveys / ISM: molecules, structure / Galaxy: center / radio lines: ISM
© European Southern Observatory (ESO), 1997