Observations of three Wolf-Rayet stars in M33

Details Observations of three Wolf-Rayet stars in M33 Observations of three Wolf-Rayet stars in M33

Jul 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977mnras.180p..15b&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 180, July 1977, p. 15P-19P. Research supported by the Science Research

Astronomy and Astrophysics

Astronomy

13

Early Stars, Emission Spectra, Hot Stars, Stellar Spectra, Wolf-Rayet Stars, Companion Stars, H Ii Regions, Hydrogen Ions, Milky Way Galaxy, Telescopes

Scientific paper

Spectra of three objects in M33 identified as Wolf-Rayet stars are examined which were obtained over the wavelength range from 3450 to 5100 A with an image photon-counting system mounted on the digital spectrograph at the Cassegrain focus of the 5-m Hale telescope. The object WR-13 is found to be embedded in an H II region and is classified as a WN star of subclass WN5 or WN6. The spectrum of WR-16 is shown to confirm the previous result that this object is a WC7 star. An early-type companion is inferred, and it is suggested that WR stars in M33 are similar to those in the Galaxy. A previously unclassified object observed in the M33 H II region IC 132 is identified as a WN4 star.

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