Rapid-photometry of Wolf-Rayet Stars: a search for strange-mode pulsations

Details Rapid-photometry of Wolf-Rayet Stars: a search for strange-mode pulsations Rapid-photometry of Wolf-Rayet Stars: a search for strange-mode pulsations

Jul 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009coast.158..214c&link_type=abstract

"Communications in Asteroseismology, Vol.158, p. 214 Proceedings of "38th Liege International Astrophysical Colloquium: Evoluti

Astronomy and Astrophysics

Astrophysics

Scientific paper

Theoretical work suggests that strange-mode pulsations (SMPs) are present in the envelope of hot and luminous stars with a large luminosity-to-mass ratio, where the thermal timescale is short compared to the dynamical timescale, and where radiation pressure dominates (Glatzel et al. 1993). The most violent SMPs are expected in classical Wolf-Rayet (WR) stars, i.e the bare, compact helium-burning cores of evolved massive stars (Glatzel et al. 1999), where SMPs manifest themselves in cyclic photometric variability with periods ranging from minutes to hours. However, these variabilities are expected to be epoch-dependent. Here we report on our attempts to detect SMPs in several WR stars using rapid, high-precision photometry.

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