IRAS observations of AS431 - A superluminous WR star?

Details IRAS observations of AS431 - A superluminous WR star? IRAS observations of AS431 - A superluminous WR star?

Sep 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...150l...9s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 150, no. 1, Sept. 1985, p. L9-L11.

Astronomy and Astrophysics

Astronomy

12

Infrared Astronomy Satellite, Stellar Luminosity, Stellar Mass Ejection, Stellar Spectrophotometry, Wolf-Rayet Stars, Interstellar Extinction, Radio Spectra, Spectral Energy Distribution, Stellar Winds, Visible Spectrum

Scientific paper

IRAS observations of AS 431 show pronounced free-free emission from its stellar wind but no evidence for any reemission from dust. The large reddening of the object is thus not due to circumstellar dust. A reasonable flux curve can only be obtained with high values of EB-V but in this case the luminosity is extreme, MV ≡ -9.7 mag. The IRAS-radio spectral index derived is α = 0.50 (fairly indepedent of the uncertainty in EB-V) and is close to the value expected for a constant velocity outflow wind. A mass loss rate of ≡3×10-4M_sun;yr-1 is deduced and is higher than is normal for WR stars.

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