Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986aj.....91..925l&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 91, April 1986, p. 925-934. NSERC-supported research.
Astronomy and Astrophysics
Astronomy
39
Binary Stars, Light Curve, Stellar Spectra, Wolf-Rayet Stars, Electrophotometry, Line Spectra, Neutron Stars, Periodic Variations, Stellar Magnitude
Scientific paper
Precision continuum photometry shows that the variable WN 5 star EZ CMa has exhibited a complex but stably modulated light curve over the past five years, with one and only one period P = 3.766 ± 0.001 days. Together with new spectroscopic data, as well as previously published spectroscopic, photometric, and polarimetric observations, these photometric variations support the hypothesis that EZ CMa is a second-stage Wolf-Rayet binary probably containing a neutron star. Pulsation- and rotation-related phenomena appear unlikely to account for the observed variations. Some peculiarities in the UV and x-ray behavior still remain to be explained.
Lamarre A.
Lamontagne Robert
Moffat Anthony F. J.
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