Finding Circumstellar Disks Using Polarization and Infrared Excesses

Details Finding Circumstellar Disks Using Polarization and Infrared Excesses Finding Circumstellar Disks Using Polarization and Infrared Excesses

May 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...19510914r&link_type=abstract

American Astronomical Society, 195th AAS Meeting, #109.14; Bulletin of the American Astronomical Society, Vol. 32, p.876

Astronomy and Astrophysics

Astronomy

Scientific paper

We have instituted a new program for identifying possible planetary systems and circumstellar disks in nearby stars. We are examining a standard sample of young open clusters, selected as targets for WIRE and SIRTF, using archived data from IRAS, ISO, and IPAC's 2MASS to determine evolutionary properties of circumstellar disks. We have also compiled a list of stars with known infrared excesses as well as a list of circumstellar disk stars. We plan to obtain polarimetric data for these stars in the hopes of finding new methods for detecting thin circumstellar disks which could be an indication that the disk has flattened and possibly thinned out into actual planets. Traditionally, circumstellar disks disappear shortly after the star enters the main-sequence phase. With our new observations we hope to detect the leftover thinned disks around main-sequence stars by observing the polarization of light reflecting off the top of the disk at a shallow angle. Presented here is an analysis of the data drawn from the various archives mentioned above. Continuation of the project will include the use of the new Claremont College near-IR camera, and new observations of polarization of target stars and clusters. We also hope to eventually obtain SIRTF observations of candidate stars to provide better and more definitive detections of extrasolar disks and planetary systems. The authors wish to acknowledge the support from the NSF REU grant at CSULA.

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