Dusty debris around solar-type stars: Temporal disk evolution

Citation
C. Spangler et al., Dusty debris around solar-type stars: Temporal disk evolution, ASTROPHYS J, 555(2), 2001, pp. 932-944
Citations number
86
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Space Sciences
Journal title
ASTROPHYSICAL JOURNAL
ISSN journal
0004-637X → ACNP
Volume
555
Issue
2
Year of publication
2001
Part
1
Pages
932 - 944
Database
ISI
SICI code
0004-637X(20010710)555:2<932:DDASST>2.0.ZU;2-O
Abstract
Using ISO-ISOPHOT, we carried out a survey of almost 150 stars to search fo r evidence of emission from dust orbiting young main-sequence stars, both i n clusters and isolated systems. Over half of the detections are new exampl es 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 eit her 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 exce ss luminosity relative to the stellar photosphere shows a systematic declin e of this excess with stellar age consistent with a power-law index of -2.