Spitzer Observations of Debris Disks Around F Stars: Clues to Debris Disk Lifetimes

Details Spitzer Observations of Debris Disks Around F Stars: Clues to Debris Disk Lifetimes Spitzer Observations of Debris Disks Around F Stars: Clues to Debris Disk Lifetimes

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21542811m&link_type=abstract

American Astronomical Society, AAS Meeting #215, #428.11; Bulletin of the American Astronomical Society, Vol. 42, p.346

Astronomy and Astrophysics

Astronomy

Scientific paper

Debris disks are found around stars of all spectral types and of varying ages. Rapidly rotating stars may have strong winds that will sweep away the debris around the star, or sweep the grains into the star in a Poynting-Robertson like effect (e.g., Chen et al. 2005). Variations in primordial disk properties may also directly lead to variations in main sequence debris disk properties. Primordial disks may magnetically "lock" (e.g., Konigl 1991), causing stars with long-lived primordial disks to be slow rotators on the main sequence. If long-lived primordial disks form larger planetesimal populations, main sequence slow rotators would be expected to have higher debris disk detection rates.
We selected a sample of 200 F stars in order to investigate correlations between disks and rotational velocity and B-V color. We used Multiband Imaging Photometer for Spitzer (MIPS) 24 micron photometry to look for infrared excess. We present preliminary results for infrared excesses within our sample of F stars and theories for the outcome. We compare our results to these previous theories of why debris disks are only present around some stars.
This work is based [in part] on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. Support for this work was provided by NASA through an award issued by JPL/Caltech.

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