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 mum 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.

circumstellar matter, infrared : stars, open clusters and associations : general, planetary systems, MAIN-SEQUENCE STARS, URSA MAJOR GROUP, ALL-SKY SURVEY, LOW-MASS STARS, T-TAURI STARS, X-RAY SOURCES, I DARK CLOUD, CHAMELEON-I, CIRCUMSTELLAR DISK, BETA-PICTORIS, Astronomy & Astrophysics
Spangler, C., et al. (2001): Dusty Debris around Solar-Type Stars: Temporal Disk Evolution. The Astronomical Journal, 555(2). DOI: https://doi.org/10.1086/321490