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Title: THE DROP DURING LESS THAN 300 DAYS OF A DUSTY WHITE DWARF'S INFRARED LUMINOSITY

Abstract

We report Spitzer/Infrared Array Camera photometry of WD J0959–0200, a white dwarf that displays excess infrared radiation from a disk, likely produced by a tidally disrupted planetesimal. We find that in 2010, the fluxes in both 3.6 μm and 4.5 μm decreased by ∼35% in less than 300 days. The drop in the infrared luminosity is likely due to an increase of the inner disk radius from one of two scenarios: (1) a recent planetesimal impact; (2) instability in the circumstellar disk. The current situation is tantalizing; high-sensitivity, high-cadence infrared studies will be a new tool to study the interplay between a disk and its host white dwarf star.

Authors:
;  [1]
  1. Department of Physics and Astronomy, University of California, Los Angeles, CA 90095-1562 (United States)
Publication Date:
OSTI Identifier:
22365055
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal Letters
Additional Journal Information:
Journal Volume: 792; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 2041-8205
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTEROIDS; ASTROPHYSICS; CAMERAS; INFRARED RADIATION; LUMINOSITY; PHOTOMETRY; PLANETS; SENSITIVITY; WHITE DWARF STARS

Citation Formats

Xu, S., and Jura, M., E-mail: sxu@astro.ucla.edu, E-mail: jura@astro.ucla.edu. THE DROP DURING LESS THAN 300 DAYS OF A DUSTY WHITE DWARF'S INFRARED LUMINOSITY. United States: N. p., 2014. Web. doi:10.1088/2041-8205/792/2/L39.
Xu, S., & Jura, M., E-mail: sxu@astro.ucla.edu, E-mail: jura@astro.ucla.edu. THE DROP DURING LESS THAN 300 DAYS OF A DUSTY WHITE DWARF'S INFRARED LUMINOSITY. United States. doi:10.1088/2041-8205/792/2/L39.
Xu, S., and Jura, M., E-mail: sxu@astro.ucla.edu, E-mail: jura@astro.ucla.edu. Wed . "THE DROP DURING LESS THAN 300 DAYS OF A DUSTY WHITE DWARF'S INFRARED LUMINOSITY". United States. doi:10.1088/2041-8205/792/2/L39.
@article{osti_22365055,
title = {THE DROP DURING LESS THAN 300 DAYS OF A DUSTY WHITE DWARF'S INFRARED LUMINOSITY},
author = {Xu, S. and Jura, M., E-mail: sxu@astro.ucla.edu, E-mail: jura@astro.ucla.edu},
abstractNote = {We report Spitzer/Infrared Array Camera photometry of WD J0959–0200, a white dwarf that displays excess infrared radiation from a disk, likely produced by a tidally disrupted planetesimal. We find that in 2010, the fluxes in both 3.6 μm and 4.5 μm decreased by ∼35% in less than 300 days. The drop in the infrared luminosity is likely due to an increase of the inner disk radius from one of two scenarios: (1) a recent planetesimal impact; (2) instability in the circumstellar disk. The current situation is tantalizing; high-sensitivity, high-cadence infrared studies will be a new tool to study the interplay between a disk and its host white dwarf star.},
doi = {10.1088/2041-8205/792/2/L39},
journal = {Astrophysical Journal Letters},
issn = {2041-8205},
number = 2,
volume = 792,
place = {United States},
year = {2014},
month = {9}
}