Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-09-05
Astrophys.J.653:1480-1485,2006
Astronomy and Astrophysics
Astrophysics
accepted by ApJ
Scientific paper
10.1086/508919
The 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.
Andrews Sean M.
Williams Jonathan P.
No associations
LandOfFree
The Dust Properties of Eight Debris Disk Candidates as Determined by Submillimeter Photometry does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Dust Properties of Eight Debris Disk Candidates as Determined by Submillimeter Photometry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Dust Properties of Eight Debris Disk Candidates as Determined by Submillimeter Photometry will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-417670