Journal Article

Dust structure around the Wolf–Rayet star WR104 from lunar occultation observations at 2.2 µm

Soumen Mondal and T. Chandrasekhar

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 334, issue 1, pages 143-148
Published in print July 2002 | ISSN: 0035-8711
Published online July 2002 | e-ISSN: 1365-2966 | DOI: https://dx.doi.org/10.1046/j.1365-8711.2002.05497.x
Dust structure around the Wolf–Rayet star WR104 from lunar occultation observations at 2.2 µm

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Abstract

A rare opportunity of observing a lunar occultation of a Wolf–Rayet star (WR104) in the near-infrared K band (2.2 µm) was utilized to probe the thick dust envelope surrounding the star at a high one-dimensional angular resolution (∼2 mas). Analysis of the occultation light curve shows a dust structure departing significantly from the uniform disc profile. Our results are in good agreement with recent aperture-masking interferometry carried out at the Keck I telescope, which shows a pinwheel structure around WR104. We report additional fine structures in the dust envelope.

Keywords: occultations; Moon; circumstellar matter; stars: individual: WR104; stars: Wolf–Rayet; infrared: stars

Journal Article.  3587 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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