eprintid: 1477406
rev_number: 24
eprint_status: archive
userid: 608
dir: disk0/01/47/74/06
datestamp: 2016-07-01 15:42:03
lastmod: 2021-10-20 23:55:10
status_changed: 2017-07-13 15:50:54
type: article
metadata_visibility: show
creators_name: Jura, M
creators_name: Farihi, J
creators_name: Zuckerman, B
creators_name: Becklin, EE
title: Infrared emission from the dusty disk orbiting GD 362, an externally polluted white dwarf
ispublished: pub
divisions: UCL
divisions: B04
divisions: C06
divisions: F60
keywords: circumstellar matter; minor planets, asteroids; white dwarfs
note: Copyright © 2007. The American Astronomical Society. All rights reserved.
abstract: We report Spitzer Space Telescope photometry between 3.6 and 24 μm and spectroscopy between 5 and 15 μm of GD 362, a white dwarf with an effective temperature near 10,000 K that displays a remarkably high concentration of metals in its photosphere and a thermal infrared excess. We approximately reproduce both the infrared continuum and the very strong 10 μm silicate emission feature with a model of an orbiting dusty disk that is flat out to 50 stellar radii and warped between 50 and 70 stellar radii. The relatively small amount of cold material implied by the weak 24 μm flux argues that the disk lies within the Roche radius of the star, and we may be witnessing a system where an asteroidal-size body has been tidally destroyed. If so, determination of the photospheric metal abundances may measure the bulk composition of an extrasolar minor planet.
date: 2007-05-01
date_type: published
official_url: http://dx.doi.org/10.1086/512734
oa_status: green
full_text_type: pub
language: eng
primo: open
primo_central: open_green
article_type_text: Journal Article
verified: verified_manual
elements_id: 1105563
doi: 10.1086/512734
lyricists_name: Farihi, Jay
lyricists_id: JFARI07
actors_name: Farihi, Jay
actors_id: JFARI07
actors_role: owner
full_text_status: public
publication: Astronomical Journal
volume: 133
number: 5
pagerange: 1927-1933
issn: 0004-6256
citation:        Jura, M;    Farihi, J;    Zuckerman, B;    Becklin, EE;      (2007)    Infrared emission from the dusty disk orbiting GD 362, an externally polluted white dwarf.                   Astronomical Journal , 133  (5)   pp. 1927-1933.    10.1086/512734 <https://doi.org/10.1086/512734>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/1477406/1/Farihi_205664.web.pdf