New type of brightness variations of the colliding wind WO4 + O5((f)) binary WR 30a

Details New type of brightness variations of the colliding wind WO4 + O5((f)) binary WR 30a New type of brightness variations of the colliding wind WO4 + O5((f)) binary WR 30a

Jun 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003a%26a...404l..29p&link_type=abstract

Astronomy and Astrophysics, v.404, p.L29-L32 (2003)

Astronomy and Astrophysics

Astrophysics

1

Stars: Binaries, Stars: Wolf-Rayet, Stars: Individual: Wr 30A

Scientific paper

We present new photometric observations in Johnson V and B of WR 30a, revealing relative dramatic changes in brightness of 0fm 2. These variations occur on a time scale of hours, and are only seen in V. We argue that they are not caused by dust extinction, but either by a dramatic change in the strength of the C IV 5801-12 Å emission line doublet due to a de-excitation process, or by some unknown continuum effect.
Tables 2-4 are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/404/L29

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