SIMBAD references

2004A&A...420L...9R - Astronomy and Astrophysics, volume 420, L9-13 (2004/6-3)

WR20a: A massive cornerstone binary system comprising two extreme early-type stars.

RAUW G., DE BECKER M., NAZE Y., CROWTHER P.A., GOSSET E., SANA H., VAN DER HUCHT K.A., VREUX J.-M. and WILLIAMS P.M.

Abstract (from CDS):

We analyse spectroscopic observations of WR20a revealing that this star is a massive early-type binary system with a most probable orbital period of ∼3.675days. Our spectra indicate that both components are most likely of WN6ha or O3If*/WN6ha spectral type. The orbital solution for a period of 3.675days yields extremely large minimum masses of 70.7±4.0 and 68.8 ±3.8M☉ for the two stars. These properties make WR20a a cornerstone system for the study of massive star evolution.

Abstract Copyright: ∼

Journal keyword(s): binaries: spectroscopic - stars: early-type - stars: fundamental parameters - stars: individual: WR 20a

CDS comments: Mk 42 = Cl* NGC 2070 MEL 42.

Simbad objects: 10

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