The evolution of dusty Debris disks around solar type stars

Journal Article · Fri Jan 10 00:00:00 EST 2014 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/780/2/154· OSTI ID:22348222

Vican, Laura ^[1]; Schneider, Adam ^[2]

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1. Department of Physics and Astronomy, University of California, Los Angeles, CA 90095 (United States)
2. Department of Physics and Astronomy, University of Georgia, Athens, GA 30602 (United States)

We used chromospheric activity to determine the ages of 2820 field stars. We searched these stars for excess emission at 22 μm with the Wide-Field Infrared Survey Explorer. Such excess emission is indicative of a dusty debris disk around a star. We investigated how disk incidence trends with various stellar parameters, and how these parameters evolve with time. We found 22 μm excesses around 98 stars (a detection rate of 3.5%). Of these 98 excess sources, 74 are presented here for the first time. We also measured the abundance of lithium in eight dusty stars in order to test our stellar age estimates.

• OSTI ID: 22348222
• Journal Information: Astrophysical Journal, Vol. 780, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
DETECTION
ELEMENT ABUNDANCE
EMISSION
EVOLUTION
INFRARED SURVEYS
LITHIUM
STARS