The Diversity of Debris Disks Around A Stars

Details The Diversity of Debris Disks Around A Stars The Diversity of Debris Disks Around A Stars

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...205.1120r&link_type=abstract

American Astronomical Society Meeting 205, #11.20; Bulletin of the American Astronomical Society, Vol. 36, p.1355

Other

1

Scientific paper

Combined Spitzer, ISO, and IRAS observations now characterize nearly 300 debris disks around stars of about 2.5 solar masses. A surprising result is that these systems display a huge range of properties. For example, their spectral energy distributions between 24 and 70 microns have a wide range slopes, and the slopes show no recognizable pattern as a function of the stellar age, or other parameters that might be relevant. Some of the systems contain large amounts of small dust grains, even close to the star. In these cases, the lifetime of the grains is short, and for them to dominate the radiometric properties of the system requires a very high replenishment rate. In the cases of beta Pic and Vega, detailed models indicate that small grains are being ejected by radiation pressure, a process that acts over a time scale of 1000 years or less. In such cases, estimates of the mass requirements for continuous replenishment of the grains over the life of the star suggest that the total would be forbiddingly large. We interpret these systems, and the variety of debris disk properties generally, in terms of recent models that suggest that the radiometric properties of such systems may be dominated over a significant fraction of the life of the star by the results of single, catastrophic planetestimal collisions.

Affiliated with

Also associated with

No associations

Rating

The Diversity of Debris Disks Around A Stars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The Diversity of Debris Disks Around A Stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Diversity of Debris Disks Around A Stars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1635935