Imaging "Pinwheel"nebulae with optical long-baseline interferometry

Details Imaging "Pinwheel"nebulae with optical long-baseline interferometry Imaging "Pinwheel"nebulae with optical long-baseline interferometry

2010-11-15

arxiv.org/abs/1011.3394v1

Active OB stars: structure, evolution, mass loss and critical limits., Paris : France (2010)

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

To be published soon in the conference proceeding

Scientific paper

Dusty Wolf-Rayet stars are few but remarkable in terms of dust production rates (up to one millionth of solar mass per year). Infrared excesses associated to mass-loss are found in the sub-types WC8 and WC9. Few WC9d stars are hosting a "pinwheel" nebula, indirect evidence of a companion star around the primary. While few other WC9d stars have a dust shell which has been barely resolved so far, the available angular resolution offered by single telescopes is insufficient to confirm if they also host "pinwheel" nebulae or not. In this article, we present the possible detection of such nebula around the star WR118. We discuss about the potential of interferometry to image more "pinwheel" nebulae around other WC9d stars.

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