Dust structure around the Wolf–Rayet star WR104 from lunar occultation observations at 2.2 μm |
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Authors: | Soumen Mondal T. Chandrasekhar |
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Affiliation: | Physical Research Laboratory, Ahmedabad-380 009, India |
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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. |
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Keywords: | occultations Moon circumstellar matter stars: individual: WR104 stars: Wolf–Rayet infrared: stars |
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