Emission Properties of an Eccentric Disk around HD 69830
First Author:
Matthew Payne
Email: mpayne AT ast.cam.ac.uk
University of Cambridge
Institute of Astronomy, Madingley Road
Cambridge, CB3 0HA, UK
Coauthors:
Ford, Eric, University of Florida
Wyatt, Mark, University of Cambridge
Booth, Mark, University of Cambridge
Abstract
Spitzer observations of HD 69830 have revealed an excess of emission relative to the stellar photosphere between 8 and 35 microns, but no excess at 70 microns. Subsequent radial velocity observations have also revealed a system of 3 close-in Neptune-mass planets in the same system. We investigate the potential for a long-lived eccentric planetesimal disk to explain these observations. We perform n-body simulations of the system formation to understand the likelihood of an eccentric disk forming and then combine this work with models of the collisional evolution of such disks, in order to understand their long-term spectral emission properties.
Link to PDF
