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

Type of content
Journal Article
Thesis discipline
Degree name
Publisher
University of Canterbury. University Centre for Teaching and Learning
University of Canterbury. AVC Research Office
Journal Title
Journal ISSN
Volume Title
Language
Date
2003
Authors
Paardekooper, S.J.
van der Hucht, K.A.
van Genderen, A.M.
Brogt, E.
Gieles, M.
Meijerink, R.
Abstract

We present new photometric observations in Johnson V and B of WR30a, revealing relative dramatic changes in brightness of 0:m 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.

Description
Citation
Paardekooper, S.J., van der Hucht, K.A., van Genderen, A.M., Brogt, E., Gieles, M., Meijerink, R. (2003) New type of brightness variations of the colliding wind WO4 + O5((f)) binary WR 30a. Astronomy and Astrophysics, 404, pp. L29-L32.
Keywords
binary stars, binaries, Wolf-Rayet, WR30a
Ngā upoko tukutuku/Māori subject headings
ANZSRC fields of research
Fields of Research::51 - Physical sciences::5101 - Astronomical sciences::510103 - Cosmology and extragalactic astronomy
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