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Letter to the Editor
HST/NICMOS2 observations of the HD 141569 A circumstellar disk *
J.C. Augereau 1,
A.M. Lagrange 1,
D. Mouillet 1 and
F. Ménard 1,2
Received 28 July 1999 / Accepted 22 September 1999
We report the first resolved scattered light images of the circumstellar dust disk around the old Pre-Main Sequence star HD 141569 A. The disk seen in HST/NICMOS2 images shapes a bright annulus inclined at from edge-on. This ring peaks at AU from the star with a characteristic width of AU. At m, the dust grains scatter a total flux density of at least mJy. Our disk model using the spatial distribution implied by the images does not explain the m excess and requires an additional grain population closer to the star. Some similarities and differences with the dust annulus surrounding HR 4796 A are pointed out.
Key words: stars: individual: HD 141569 A stars: circumstellar matter
* Based on observations with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc. under NASA contract No. NAS5-26555.
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Online publication: October 14, 1999