Dust disks around old Pre Main-Sequence stars: HST/NICMOS2 scattered light images and modeling

Details Dust disks around old Pre Main-Sequence stars: HST/NICMOS2 scattered light images and modeling Dust disks around old Pre Main-Sequence stars: HST/NICMOS2 scattered light images and modeling

2000-10-11

arxiv.org/abs/astro-ph/0010217v1

Astronomy and Astrophysics

Astrophysics

6 pages

Scientific paper

We present recent near-infrared detections of circumstellar disks around the two old PMS Herbig stars HD 141569 and HD 100546 obtained with the HST/NICMOS2 camera. They reveal extended structures larger than 350-400 AU in radius. While the HD 100546 disk appears as a continuous disk down to 40 AU, the HD 141569 environment seems more complex, splitted at least into two dust populations. As a convincing example, the full modeling of the disk surrounding HR 4796, another old PMS star, is detailed and confronted with more recent observations.

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