Variable dust formation by the colliding-wind Wolf-Rayet system HD 36402 in the Large Magellanic Cloud

Abstract

Infrared photometry of the probable triple WC4(+O?)+O8I: Wolf-Rayet system HD 36402 (= BAT99-38) in the Large Magellanic Cloud (LMC) shows emission characteristic of heated dust. The dust emission is variable on a time-scale of years, with a period near 4.7 yr, possibly associated with orbital motion of the O8 supergiant and the inner P ~ 3.03-d WC4+O binary. The phase of maximum dust emission is close to that of the X-ray minimum, consistent with both processes being tied to colliding wind effects in an elliptical binary orbit. It is evident that Wolf-Rayet dust formation occurs also in metal-poor environments.

8 pages, 4 figures, to be published in MNRAS

References in corpus (4)

• Spitzer SAGE Infrared Photometry of Massive Stars in the Large Magellanic Cloud
• Radio, X-ray, and gamma-ray Emission Models of the Colliding Winds Binary WR 140
• AKARI Infrared Camera Survey of the Large Magellanic Cloud. I. Point Source Catalog
• An X-ray Survey of Wolf-Rayet Stars in the Magellanic Clouds. II. The ROSAT PSPC and HRI Datasets

Cited by in corpus (7)

• X-ray emission from interacting massive binaries: a review of 15 years of progress
• Revisiting the Impact of Dust Production from Carbon-Rich Wolf-Rayet Binaries
• Variable dust emission by WC type Wolf-Rayet stars observed in the NEOWISE-R survey
• Revealing Efficient Dust-Formation at Low Metallicity in Extragalactic Carbon-Rich Wolf-Rayet Binaries
• Multiwavelength Observations of NaSt1 (WR 122): Equatorial Mass Loss and X-rays from an Interacting Wolf-Rayet Binary
• The episodic dust-making Wolf-Rayet star HD 38030 in the Large Magellanic Cloud
• Discovery of a 310-day Period from the Enshrouded Massive System NaSt1 (WR 122)