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APOCENTER GLOW IN ECCENTRIC DEBRIS DISKS: IMPLICATIONS FOR FOMALHAUT AND

Author(s)
Pan, Margaret; Nesvold, Erika R.; Kuchner, Marc J.
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Abstract
Debris disks often take the form of eccentric rings with azimuthal asymmetries in surface brightness. Such disks are often described as showing "pericenter glow," an enhancement of the disk brightness in regions nearest the central star. At long wavelengths, however, the disk apocenters should appear brighter than their pericenters: in the long-wavelength limit, we find that the apocenter/pericenter flux ratio scales as 1+e for disk eccentricity e. We produce new models of this "apocenter glow" to explore its causes and wavelength dependence and study its potential as a probe of dust grain properties. Based on our models, we argue that several far-infrared and (sub)millimeter images of the Fomalhaut and epsilon Eridani debris rings obtained with Herschel, JCMT, SHARC II, ALMA, and ATCA should be reinterpreted as suggestions or examples of apocenter glow. This reinterpretation yields new constraints on the disks' dust grain properties and size distributions.
Date issued
2016-11
URI
http://hdl.handle.net/1721.1/109817
Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
Journal
Astrophysical Journal
Publisher
IOP Publishing
Citation
Pan, Margaret; Nesvold, Erika R. and Kuchner, Marc J. “APOCENTER GLOW IN ECCENTRIC DEBRIS DISKS: IMPLICATIONS FOR FOMALHAUT AND ϵ ERIDANI.” The Astrophysical Journal 832, no. 1 (November 2016): 81 © 2016 The American Astronomical Society
Version: Final published version
ISSN
1538-4357
0004-637X

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