Forming the Dusty Ring in HR 4796A
Astrophysics
2009-10-31 v1
Abstract
We describe planetesimal accretion calculations for the dusty ring observed in the nearby A0 star HR 4796A. Models with initial masses of 10-20 times the minimum mass solar nebula produce a ring of width 7-15 AU and height 0.3-0.6 AU at 70 AU in roughly 10 Myr. The ring has a radial optical depth of 1. These results agree with limits derived from infrared images and from the excess infrared luminosity.
Cite
@article{arxiv.astro-ph/9908125,
title = {Forming the Dusty Ring in HR 4796A},
author = {Scott J. Kenyon and Kenneth Wood and Barbara A. Whitney and Michael J. Wolff},
journal= {arXiv preprint arXiv:astro-ph/9908125},
year = {2009}
}
Comments
6 pages, including 2 figures and 1 table; ApJ Letters, in press