Dust Formation in the Hot Massive Binary HD 192641 = WR 137 (WC7 + OB)

Details Dust Formation in the Hot Massive Binary HD 192641 = WR 137 (WC7 + OB) Dust Formation in the Hot Massive Binary HD 192641 = WR 137 (WC7 + OB)

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999apj...522..433m&link_type=abstract

The Astrophysical Journal, Volume 522, Issue 1, pp. 433-439.

Astronomy and Astrophysics

Astronomy

23

Stars: Circumstellar Matter, Infrared: Stars, Stars: Individual (Hd 192641, Wr 137), Stars: Wolf-Rayet

Scientific paper

Medium band (H' and K') images of the episodic dust-forming, long-period (~13 yr) WC7+OB binary WR 137 were obtained with the Near-Infrared Camera and Multiobject Spectrometer 2 camera of the Hubble Space Telescope during periastron passage in 1997-1998. We have resolved IR-emitting dust in the close environment of this system. The dust emission occurs in a few clumps within about 0.5" of the star, as well as in a jetlike structure with a total extension of ~0.25". The dust is likely either created or enhanced in the zone of gas shocked by wind-wind collision. We estimate the total mass of the resolved dust features during the 1997-1998 outburst to be ~2x10^-7 M_solar (~0.1M_⊕) within a factor of 3.

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