A second dust episode of the Wolf-Rayet system WR 19: another long-period WC+O colliding-wind binary

Details A second dust episode of the Wolf-Rayet system WR 19: another long-period WC+O colliding-wind binary A second dust episode of the Wolf-Rayet system WR 19: another long-period WC+O colliding-wind binary

Nov 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...339l..45v&link_type=abstract

Astronomy and Astrophysics, v.339, p.L45-L48 (1998)

Astronomy and Astrophysics

Astrophysics

15

Stars: Wolf-Rayet, Stars: Individual: Wr 19, Hd 96620, Binaries: General, Infrared: Stars

Scientific paper

We present observations of WR 19 showing an infrared excess due to newly created dust similar to an event observed in 1988. We suggest that these episodes of dust-formation are periodic (P ~ 10 yr) and related to the binary nature of the object, comparable to the colliding-wind binary WR 140. In support of this thesis we identified absorption lines from a companion of spectral type O9.5-9.7. We propose monitoring the object to determine orbital parameters, non-thermal radio emission and the accurate shape of the infrared light-curve. Based on observations collected at the European Southern Observatory (ESO), La Silla, Chile and the South African Astronomical Observatory (SAAO)

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