The Dust Properties of Eight Debris Disk Candidates as Determined by Submillimeter Photometry

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dc.creatorWilliams, Jonathan P.
dc.creatorAndrews, Sean M.
dc.date2006-09-05
dc.date.accessioned2026-07-07T10:40:00Z
dc.date.available2026-07-07T10:40:00Z
dc.descriptionThe nature of far-infrared dust emission toward main sequence stars, whether interstellar or circumstellar, can be deduced from submillimeter photometry. We present JCMT/SCUBA flux measurements at 850 microns toward 8 stars with large photospheric excesses at 60-100 microns. 5 sources were detected at 3-sigma or greater significance and one was marginally detected at 2.5-sigma. The inferred dust masses and temperatures range from 0.033 to 0.24 Earth masses and 43-65 K respectively. The frequency behavior of the opacity, tau_nu ~ nu^beta, is relatively shallow, beta < 1. These dust properties are characteristic of circumstellar material, most likely the debris from planetesimal collisions. The 2 non-detections have lower temperatures, 35-38 K and steeper opacity indices, beta > 1.5, that are more typical of interstellar cirrus. The confirmed disks all have inferred diameters > 2'', most lie near the upper envelope of the debris disk mass distribution, and 4 are bright enough to be feasible for high resolution imaging.
dc.descriptionaccepted by ApJ
dc.identifierhttps://arxiv.org/abs/astro-ph/0609122
dc.identifierhttp://arxiv.org/abs/astro-ph/0609122
dc.identifierAstrophys.J.653:1480-1485,2006
dc.identifierdoi:10.1086/508919
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/181227
dc.subjectAstrophysics
dc.titleThe Dust Properties of Eight Debris Disk Candidates as Determined by Submillimeter Photometry
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