H-ALPHA SURVEY OF THE SMALL MAGELLANIC CLOUD

Citation
E. Lecoarer et al., H-ALPHA SURVEY OF THE SMALL MAGELLANIC CLOUD, Astronomy and astrophysics, 280(2), 1993, pp. 365-372
Citations number
26
Categorie Soggetti
Astronomy & Astrophysics
Journal title
ISSN journal
00046361
Volume
280
Issue
2
Year of publication
1993
Pages
365 - 372
Database
ISI
SICI code
0004-6361(1993)280:2<365:HSOTSM>2.0.ZU;2-7
Abstract
We present the first results of a kinematical Halpha survey of the Sma ll Magellanic Cloud. We discuss the specialized instrumentation used i n this survey (telescope, focal reducer, scanning Fabry-Perot interfer ometers and photon counting system). We discuss also the main aspects of the data reduction. We compare the quality of our data with those o btained by other authors. We present images of the SMC showing both th e intensity and the radial velocity of the HII regions and a catalogue of velocities and Halpha fluxes of 143 HII regions in this galaxy. We find that the HII region distribution follows that of the HI and we v erify the existence of a gradient in velocities along the bar.