SIMBAD references

2001MNRAS.322..177O - Mon. Not. R. Astron. Soc., 322, 177-186 (2001/March-3)

Cygnus X-3 with ISO: investigating the wind.


Abstract (from CDS):

We have observed the energetic binary Cygnus X-3 in both quiescent and flaring states between 4 and 16µm using the ISO satellite. We find that the quiescent source shows the thermal free-free spectrum typical of a hot, fast stellar wind, such as from a massive helium star. The quiescent mass-loss rate arising from a spherically symmetric, non-accelerating wind is found to be in the range (0.4-2.9)x10–4Myr–1, consistent with other infrared and radio observations, but considerably larger than the 10–5M.yr–1 deduced from both the orbital change and the X-ray column density. There is rapid, large-amplitude flaring at 4.5 and 11.5µm at the same time as enhanced radio and X-ray activity, with the infrared spectrum apparently becoming flatter in the flaring state. We believe that non-thermal processes are operating, perhaps along with enhanced thermal emission.

Abstract Copyright: 2001, Royal Astronomical Society

Journal keyword(s): binaries: close - stars: individual: Cyg X-3 - stars: mass-loss - stars: Wolf-Rayet - infrared: stars - X-rays: stars

Simbad objects: 11

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