Nova-like cataclysmic variables in the infrared
Article
Article Title | Nova-like cataclysmic variables in the infrared |
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ERA Journal ID | 1057 |
Article Category | Article |
Authors | Hoard, D. W. (Author), Long, Knox S. (Author), Howell, Steve B. (Author), Wachter, Stefanie (Author), Brinkworth, Carolyn S. (Author), Knigge, Christian (Author), Drew, J. E. (Author), Szkody, Paula (Author), Kafka, S. (Author), Belle, Kunegunda (Author), Ciardi, David R. (Author), Froning, Cynthia S. (Author), van Belle, Gerard T. (Author) and Pretorius, M. L. (Author) |
Journal Title | The Astrophysical Journal: an international review of astronomy and astronomical physics |
Journal Citation | 786 (1), pp. 68-91 |
Article Number | 68 |
Number of Pages | 24 |
Year | 2014 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-637X |
1538-4357 | |
Digital Object Identifier (DOI) | https://doi.org/10.1088/0004-637X/786/1/68 |
Web Address (URL) | http://iopscience.iop.org/article/10.1088/0004-637X/786/1/68 |
Abstract | Nova-like (NL) cataclysmic variables have persistently high mass transfer rates and prominent steady state accretion disks. We present an analysis of infrared observations of 12 NLs obtained from the Two Micron All Sky Survey, the Spitzer Space Telescope, and the Wide-field Infrared Survey Explorer All Sky Survey. The presence of an infrared excess at λ ≳ 3-5 μm over the expectation of a theoretical steady state accretion disk is ubiquitous in our sample. The strength of the infrared excess is not correlated with orbital period, but shows a statistically significant correlation (but shallow trend) with system inclination that might be partially (but not completely) linked to the increasing view of the cooler outer accretion disk and disk rim at higher inclinations. We discuss the possible origin of the infrared excess in terms of emission from bremsstrahlung or circumbinary dust, with either mechanism facilitated by the mass outflows (e.g., disk wind/corona, accretion stream overflow, and so on) present in NLs. Our comparison of the relative advantages and disadvantages of either mechanism for explaining the observations suggests that the situation is rather ambiguous, largely circumstantial, and in need of stricter observational constraints. |
Keywords | accretion disks; circumstellar matter; infrared: stars; novae cataclysmic variables; stars: individual (TT Ari WX Ari QU Car V592 Cas V442 Oph V347 Pup V3885 Sgr VY Scl RW Sex RW Tri UX UMa IX Vel; |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | For access to this article, please click on the URL link provided. |
Institution of Origin | University of Southern Queensland |
Byline Affiliations | Eureka Scientific, United States |
Space Telescope Science Institute, United States | |
National Aeronautics and Space Administration (NASA), United States | |
Max Planck Society, Germany | |
California Institute of Technology (Caltech), United States | |
University of Southampton, United Kingdom | |
University of Hertfordshire, United Kingdom | |
University of Washington, United States | |
Carnegie Institution of Washington, United States | |
Los Alamos National Laboratory, United States | |
University of Colorado Boulder, United States | |
Lowell Observatory, United States | |
University of Oxford, United Kingdom |
https://research.usq.edu.au/item/q42yw/nova-like-cataclysmic-variables-in-the-infrared
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