SIMBAD references

2002ApJ...565L..59M - Astrophys. J., 565, L59-L62 (2002/January-3)

Massive binary WR 112 and properties of Wolf-Rayet dust.

MARCHENKO S.V., MOFFAT A.F.J., VACCA W.D., COTE S. and DOYON R.

Abstract (from CDS):

Some hot, massive, Population I Wolf-Rayet (W-R) stars of the carbon subclass are known to be prolific dust producers. How dust can form in such a hostile environment remains a mystery. Here we report the discovery of a relatively cool, extended, multiarc dust envelope around the star WR 112, most likely formed by wind-wind collision in a long-period binary system. We derive the binary orbital parameters, the dust temperature, and the dust mass distributions in the envelope. We find that amorphous carbon is a main constituent of the dust, in agreement with earlier estimates and theoretical predictions. However, the characteristic size of the dust grains is estimated to be ∼1 µm, significantly larger than theoretical limits. The dust production rate is 6.1x10–7 M yr–1, and the total detectable dust mass is found to be about 2.8x10–5 M (for d=4.15 kpc). We also show that, despite the hostile environment, at least ∼20% of the initially formed dust may reach the interstellar medium.

Abstract Copyright:

Journal keyword(s): Infrared: Stars - Stars: Winds, Outflows - Stars: Wolf-Rayet

Status at CDS:  

Simbad objects: 5

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2020.05.30-00:55:11

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