Dust disks around old Pre Main - Sequence stars : HST / NICMOS 2 scattered light images and modeling
نویسندگان
چکیده
We present recent near-infrared detections of circumstellar disks around the two old PMS Herbig stars HD141569 and HD100546 obtained with the HST/NICMOS2 camera. They reveal extended structures larger than 350–400 AU in radius. While the HD100546 disk appears as a continuous disk down to 40AU, the HD141569 environment seems more complex, splitted at least into two dust populations. As a convincing example, the full modeling of the disk surrounding HR4796, another old PMS star, is detailed and confronted with more recent observations.
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HST / NICMOS 2 observations of the HD 141569 A circumstellar disk ?
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