IC 10 - A 'poor cousin' rich in Wolf-Rayet stars

Details IC 10 - A 'poor cousin' rich in Wolf-Rayet stars IC 10 - A 'poor cousin' rich in Wolf-Rayet stars

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aj....103.1159m&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 103, April 1992, p. 1159-1165, 1421.

Astronomy and Astrophysics

Astronomy

46

Irregular Galaxies, Local Group (Astronomy), Star Distribution, Wolf-Rayet Stars, H Ii Regions, Stellar Spectrophotometry

Scientific paper

Narrow-band CCD imaging of the Local Group galaxy IC 10 were obtained in order to identify and characterize the Wolf-Rayet star population. Sixteen 'high significance' Wolf-Rayet candidates were found and verification spectra of four of them were obtained. A WC/WN ratio of about 0.5 and a surface density of Wolf-Rayet stars in IC 10 considerably larger than in NGC 6822, a galaxy well matched in morphology and composition were inferred; the inferred formation rate for massive stars in IC 10 is as high as any other galaxy in the Local Group. This conflicts with the recent comparison by Hodge and Lee of the luminosity functions of the H II regions of these two galaxies. It is suggested that the explanation for this conflict is partially due to the absence of gas (H I holes) in IC 10, possibly produced by the influence of massive stars on their environment.

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