Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985natur.316..705m&link_type=abstract
Nature (ISSN 0028-0836), vol. 316, Aug. 22, 1985, p. 705, 706.
Astronomy and Astrophysics
Astronomy
18
Emission Spectra, H Alpha Line, Hydrogen Clouds, Magellanic Clouds, Ultraviolet Astronomy, Hot Stars, Interferometry, Ionized Gases, Radial Velocity
Scientific paper
H-alpha profiles in the direction of the bridge of matter connecting the SMC with the LMC were obtained in February 1984 with the help of a scanning Fabry-Perot interferometer and a photon-counting system at the 1.5 m European Space Observatory telescope. The intrinsic monochromatic brightness of the observed object is found to be around 10 to the -6th erg/sq cm/s/sr. The diameters of the H-alpha interference rings from the object indicate a heliocentric radial velocity of 160 km/s + or - 5 km/s all over the observed field. It is concluded that the H-alpha emission is associated with the H I bridge and that the large cloud of hot stars observed in ultraviolet light by the Very Wide Field Camera aboard Spacelab 1 ionizes this bridge.
Boulesteix Jacques
Georgelin Yvon
Marcelin Michel
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