Other
Scientific paper
Sep 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984msngr..37...21j&link_type=abstract
ESO Messenger (ISSN 0722-0091), Sept. 1984, p. 21-23.
Other
Galactic Clusters, Galactic Rotation, Radial Velocity, Wolf-Rayet Stars, X Ray Sources, Axes Of Rotation, Cosmology, Kinematics, Space Density
Scientific paper
The observational results for a sample of Wolf-Rayet (WR) stars in lazy galaxies are discussed within the context of a general deep search of WR emission in relatively distant objects conducted with the Palomar 200-inch, Las Campanas 2.5-m, and the La Silla 1.5- and 3.6-m telescopes. The sample is composed of observations in the range between 4600 and 4700 A. WR stars were positively detected in three galaxies and are suspected in 16 others at 1.0 sigma over the underlying background. It is found that for the three best observed cases of WR emission, the equivalent width of the emission line was in no way similar to that of the H-beta emission line. The spread in EW (H-beta) emission by a factor of 20 corresponded to a nearly constant WR equivalent width of about 8 A, but not at all to the number of ionizing massive stars. It is suggested that WR stars in lazy galaxies occur in a population of stars less massive than 60 solar mass and that they are linked to the early evolutionary phase of the burst of star formation. A tracing of a typical broadband WR emission in the spectrum of Mkn 750 is provided.
Joubert M.
Kunth Daniel
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