A dearth of small particles in the transiting material around the white dwarf WD 1145+017
Article
Article Title | A dearth of small particles in the transiting material around the white dwarf WD 1145+017 |
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ERA Journal ID | 1074 |
Article Category | Article |
Authors | Xu, S. (Author), Rappaport, S. (Author), van Lieshout, R. (Author), Vanderburg, A. (Author), Gary, B. (Author), Hallakoun, N. (Author), Ivanov, V. D. (Author), Wyatt, M. C. (Author), DeVore, J. (Author), Bayliss, D. (Author), Bento, J. (Author), Bieryla, A. (Author), Cameron, A. (Author), Cann, J. M. (Author), Croll, B. (Author), Collins, K. A. (Author), Dalba, P. A. (Author), Debes, J. (Author), Doyle, D. (Author), Dufour, P. (Author), Ely, J. (Author), Espinoza, N. (Author), Joner, M. D. (Author), Jura, M. (Author), Kaye, T. (Author), McClain, J. L. (Author), Muirhead, P. (Author), Palle, E. (Author), Panka, P. A. (Author), Provencal, J. (Author), Randall, S. (Author), Rodriguez, J. E. (Author), Scarborough, J. (Author), Sefako, R. (Author), Shporer, A. (Author), Strickland, W. (Author), Zhou, G. (Author) and Zuckerman, B. (Author) |
Journal Title | Monthly Notices of the Royal Astronomical Society |
Journal Citation | 474 (4), pp. 4795-4809 |
Number of Pages | 15 |
Year | 2017 |
Publisher | Oxford University Press |
Place of Publication | United Kingdom |
ISSN | 0035-8711 |
1365-2966 | |
Digital Object Identifier (DOI) | https://doi.org/10.1093/mnras/stx3023 |
Web Address (URL) | https://academic.oup.com/mnras/article/474/4/4795/4657183 |
Abstract | White dwarf WD 1145+017 is orbited by several clouds of dust, possibly emanating from actively disintegrating bodies. These dust clouds reveal themselves through deep, broad, and evolving transits in the star's light curve. Here, we report two epochs of multiwavelength photometric observations of WD 1145+017, including several filters in the optical, Ks and 4.5 μmbands in 2016 and 2017. The observed transit depths are different at these wavelengths. However, after correcting for excess dust emission at Ks and 4.5 μm, we find the transit depths for the white dwarf itself are the same at all wavelengths, at least to within the observational uncertainties of ~5-10 per cent. From this surprising result, and under the assumption of low optical depth dust clouds, we conclude that there is a deficit of small particles (with radii s ≲ 1.5 μm) in the transiting material. We propose a model wherein only large particles can survive the high equilibrium temperature environment corresponding to 4.5 h orbital periods around WD 1145+017, while small particles sublimate rapidly. In addition, we evaluate dust models that are permitted by our measurements of infrared emission. |
Keywords | eclipses; minor planets; asteroids: general; stars: individual: WD; 1145+017; white dwarfs; Astrophysics - Earth and Planetary Astrophysics |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2017 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. |
Institution of Origin | University of Southern Queensland |
Byline Affiliations | European Southern Observatory (ESO), Germany |
Massachusetts Institute of Technology, United States | |
University of Cambridge, United Kingdom | |
Center for Astrophysics Harvard and Smithsonian, United States | |
Hereford Arizona Observatory, United States | |
Visidyne, United States | |
University of Geneva, Switzerland | |
Australian National University | |
University of St Andrews, United Kingdom | |
George Mason University, United States | |
Boston University, United States | |
Space Telescope Science Institute, United States | |
Paul and Jane Meyer Observatory, United States | |
University of Montreal, Canada | |
Eureka Scientific, United States | |
Pontifical Catholic University of Chile, Chile | |
Brigham Young University, United States | |
University of California, United States | |
Raemor Vista Observatory, United States | |
Institute of Astrophysics of the Canary Islands, Spain | |
University of Delaware, United States | |
South African Astronomical Observatory, South Africa | |
California Institute of Technology (Caltech), United States |
https://research.usq.edu.au/item/q6x6v/a-dearth-of-small-particles-in-the-transiting-material-around-the-white-dwarf-wd-1145-017
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