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Marseille Observatory Hα Survey of the Southern Galactic Plane and Magellanic Clouds

Published online by Cambridge University Press:  05 March 2013

D. Russeil ,
Y. M. Georgelin ,
P. Amram ,
Y. P. Georgelin ,
A. Laval  and
M. Marcelin
D. Russeil
Affiliation:
Observatoire de Marseille, 2 Place le Verrier, Marseille, 13248 cedex 4, France; russeil@obmara.cnrs-mrs.fr
Y. M. Georgelin
Affiliation:
Observatoire de Marseille, 2 Place le Verrier, Marseille, 13248 cedex 4, France
P. Amram
Affiliation:
Observatoire de Marseille, 2 Place le Verrier, Marseille, 13248 cedex 4, France
Y. P. Georgelin
Affiliation:
Observatoire de Marseille, 2 Place le Verrier, Marseille, 13248 cedex 4, France
A. Laval
Affiliation:
Observatoire de Marseille, 2 Place le Verrier, Marseille, 13248 cedex 4, France
M. Marcelin
Affiliation:
Observatoire de Marseille, 2 Place le Verrier, Marseille, 13248 cedex 4, France
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Abstract

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The ionised 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. A survey of the southern Galactic plane then started at the beginning of 1990. The major instrumental aim is to obtain spectral information, and therefore the ionised gas kinematics, in each pixel of the observed fields. Already 300 fields of 38′×38′ have been observed in Hα with a spatial resolution of 9″×9″, covering almost the entire fourth quadrant of the Galactic plane, and numerous discrete HII regions have been detected, as well as diffuse emission which is widely distributed. Also, the Magellanic Clouds have been studied using the same instrument.

Keywords

ISM: HII regions, supernovae remnants, kinematics and dynamicsGalaxy: structureGalaxies: individual (Large Magellanic Cloud, Small Magellanic Cloud)
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 15 , Issue 1 , 1998 , pp. 9 - 13
Copyright
Copyright © Astronomical Society of Australia 1998

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