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Published July 10, 2001 | Accepted Version + Published
Journal Article Open

Dusty Debris around Solar-Type Stars: Temporal Disk Evolution


Using ISO-ISOPHOT, we carried out a survey of almost 150 stars to search for evidence of emission from dust orbiting young main-sequence stars, both in clusters and isolated systems. Over half of the detections are new examples of dusty stellar systems and demonstrate that such dust can be detected around numerous stars older than a few times 10^6 yr. Fluxes at 60 and either 90 or 100 μm for the new excess sources together with improved fluxes for a number of IRAS-identified sources are presented. Analysis of the excess luminosity relative to the stellar photosphere shows a systematic decline of this excess with stellar age consistent with a power-law index of -2.

Additional Information

© 2001 The American Astronomical Society. Received 2001 January 10; accepted 2001 March 8. The ISOPHOT data presented in this paper were reduced using PIA, which is a joint development by the ESA Astrophysics Division and the ISOPHOT consortium. This work was facilitated by the use of the Vizier service and the SIMBAD database developed at CDS. This work has made use of XCATSCAN, an internet service provided by the Infrared Processing and Analysis Center (IPAC), which is operated by the Jet Propulsion Lab and the California Institute of Technology under contract to NASA. We would like to thank M. Jura and P. Goldreich for assistance with the original ISO program and D. Backman for helpful comments. This research was supported in part by an ISO Key Project NASA grant to UCLA and Caltech.

Attached Files

Published - Spangler_2001_ApJ_555_932.pdf

Accepted Version - 0103185.pdf


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