Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998pasa...15....9r&link_type=abstract
Publications Astronomical Society of Australia, vol. 15, no. 1, p. 9-13
Astronomy and Astrophysics
Astronomy
6
Interstellar Medium, Galactic Plane, Magellanic Clouds
Scientific paper
The ionized gas regions, which are the main tracers of the spiral arms, can be used for the study and determination of the spiral structure of our Galaxy. Towards this goal, the Marseille Observatory elaborated and developed an instrument, using a scanning Fabry-Perot interferometer, particularly suited for the observation of extended objects. The survey of the southern Galactic plane then started at the beginning of 1990. The major instrumental aim is to obtain the spectral information, and therefore the ionized gas kinematics, in each pixel of the observed fields. Already 300 fields of 38'X38' have been observed in H-alpha with a spatial resolution of 9" X 9", covering almost the entire fourth quadrant of the Galactic plane, detecting numerous discrete HII regions and the diffuse emission which is widely distributed. Also, the Magellanic Clouds are studied using the same instrument.
Amram Ph.
Georgelin Y. P.
Georgelin Y. M.
Laval A.
Marcelin Michel
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