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Title: THE WIRED SURVEY. III. AN INFRARED EXCESS AROUND THE ECLIPSING POST-COMMON ENVELOPE BINARY SDSS J030308.35+005443.7

Abstract

We present the discovery with WISE of a significant infrared excess associated with the eclipsing post-common envelope binary SDSS J030308.35+005443.7, the first excess discovered around a non-interacting white dwarf+main-sequence M dwarf binary. The spectral energy distribution of the white dwarf+M dwarf companion shows significant excess longward of 3 {mu}m. A T {sub eff} of 8940 K for the white dwarf is consistent with a cooling age >2 Gyr, implying that the excess may be due to a recently formed circumbinary dust disk of material that extends from the tidal truncation radius of the binary at 1.96 R {sub Sun} out to <0.8 AU, with a total mass of {approx}10{sup 20} g. We also construct WISE and follow-up ground-based near-infrared light curves of the system and find variability in the K band that appears to be in phase with ellipsoidal variations observed in the visible. The presence of dust might be due to (1) material being generated by the destruction of small rocky bodies that are being perturbed by an unseen planetary system or (2) dust condensing from the companion's wind. The high inclination of this system and the presence of dust make it an attractive target for M dwarf transitmore » surveys and long-term photometric monitoring.« less

Authors:
 [1];  [2];  [3];  [4];  [5];  [6]
  1. Space Telescope Science Institute, Baltimore, MD 21218 (United States)
  2. Spitzer Science Center, California Institute of Technology, Pasadena, CA 91125 (United States)
  3. Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH (United Kingdom)
  4. IPAC, California Institute of Technology, Pasadena, CA (United States)
  5. Goddard Space Flight Center, Greenbelt, MD 20771 (United States)
  6. Monterey Institute for Research in Astronomy, Marina, CA 93933 (United States)
Publication Date:
OSTI Identifier:
22086480
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 759; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTRONOMY; ASTROPHYSICS; BINARY STARS; COOLING; COSMIC DUST; DIAGRAMS; ENERGY SPECTRA; INCLINATION; MASS; NEAR INFRARED RADIATION; PHOTOMETRY; STELLAR WINDS; VISIBLE RADIATION; WHITE DWARF STARS

Citation Formats

Debes, John H., Hoard, D. W., Farihi, Jay, Wachter, Stefanie, Leisawitz, David T., and Cohen, Martin. THE WIRED SURVEY. III. AN INFRARED EXCESS AROUND THE ECLIPSING POST-COMMON ENVELOPE BINARY SDSS J030308.35+005443.7. United States: N. p., 2012. Web. doi:10.1088/0004-637X/759/1/37.
Debes, John H., Hoard, D. W., Farihi, Jay, Wachter, Stefanie, Leisawitz, David T., & Cohen, Martin. THE WIRED SURVEY. III. AN INFRARED EXCESS AROUND THE ECLIPSING POST-COMMON ENVELOPE BINARY SDSS J030308.35+005443.7. United States. doi:10.1088/0004-637X/759/1/37.
Debes, John H., Hoard, D. W., Farihi, Jay, Wachter, Stefanie, Leisawitz, David T., and Cohen, Martin. Thu . "THE WIRED SURVEY. III. AN INFRARED EXCESS AROUND THE ECLIPSING POST-COMMON ENVELOPE BINARY SDSS J030308.35+005443.7". United States. doi:10.1088/0004-637X/759/1/37.
@article{osti_22086480,
title = {THE WIRED SURVEY. III. AN INFRARED EXCESS AROUND THE ECLIPSING POST-COMMON ENVELOPE BINARY SDSS J030308.35+005443.7},
author = {Debes, John H. and Hoard, D. W. and Farihi, Jay and Wachter, Stefanie and Leisawitz, David T. and Cohen, Martin},
abstractNote = {We present the discovery with WISE of a significant infrared excess associated with the eclipsing post-common envelope binary SDSS J030308.35+005443.7, the first excess discovered around a non-interacting white dwarf+main-sequence M dwarf binary. The spectral energy distribution of the white dwarf+M dwarf companion shows significant excess longward of 3 {mu}m. A T {sub eff} of 8940 K for the white dwarf is consistent with a cooling age >2 Gyr, implying that the excess may be due to a recently formed circumbinary dust disk of material that extends from the tidal truncation radius of the binary at 1.96 R {sub Sun} out to <0.8 AU, with a total mass of {approx}10{sup 20} g. We also construct WISE and follow-up ground-based near-infrared light curves of the system and find variability in the K band that appears to be in phase with ellipsoidal variations observed in the visible. The presence of dust might be due to (1) material being generated by the destruction of small rocky bodies that are being perturbed by an unseen planetary system or (2) dust condensing from the companion's wind. The high inclination of this system and the presence of dust make it an attractive target for M dwarf transit surveys and long-term photometric monitoring.},
doi = {10.1088/0004-637X/759/1/37},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 1,
volume = 759,
place = {United States},
year = {2012},
month = {11}
}