APOCENTER GLOW IN ECCENTRIC DEBRIS DISKS: IMPLICATIONS FOR FOMALHAUT AND
Name
Pan-2016-APOCENTER GLOW IN ECCENTRIC DEBRIS DI.pdf
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Author(s)
Pan, Margaret
Nesvold, Erika R.
Kuchner, Marc J.
Date Issued
November 2016
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
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.
MIT Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.3847/0004-637x/832/1/81
