Studying of exoasteroids orbiting around WD 1145+017
Maliuk A. Budaj J. Mkrtichian D. Garai Z. Zharikov S. Pribulla T. Komźík R. Kusakin A. Shestakova L. Kokumbaeva R. Reva I. Joshi S. Valeev A. Gadelshin D. Valyavin G. A-thano N. Mennickent R. Serebryanskiy A. Kaye T.G.
2024Astronomical Institute, Slovak Academy of Sciences
Contributions of the Astronomical Observatory Skalnate Pleso
2024#54Issue 298 - 106 pp.
WD 1145+017 is the first white dwarf known to be orbited by disintegrating exoasteroids. It is a helium-dominated white dwarf with lines of metals in spectra and variable asymmetric transits. The analysis of WD 1145 light curve allowed us to identify at least 8 bodies which periodically eclipse the star, showing periods ranging from 4.490 to 4.493 hours. Waterfall diagram shows that some of these periods are not stable. Estimating transit depths gave us possibility to assess the disintegration rate. We have estimated the lower limit of dust masses associated with these bodies, which exhibits time-varying characteristics, fluctuating within the range of approximately 2 − 3 × 1014 kg.
circumstellar dust , exoasteroids , exoplanets
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Astronomical Institute of the Slovak Academy of Sciences, Tatranská Lomnica, 059 60, Slovakia
National Astronomical Research Institute of Thailand, Chiang Mai, 50180, Thailand
HUN-REN-ELTE Exoplanet Research Group, Szent Imre h. u. 112, Szombathely, 9700, Hungary
Instituto de Astronomía, Universidad Nacional Autónoma de México, Apdo. Postal 877, Baja California, Ensenada, 22800, Mexico
Fesenkov Astrophysical Institute, Observatory 23, Almaty, 050020, Kazakhstan
Aryabhatta Research Institute of Observational Sciences, Manora Peak, Nainital, 263002, India
Special Astrophysical Observatory, Nizhnij Arkhyz, 369167, Russian Federation
Department of Physics and Institute of Astronomy, National Tsing-Hua University, Hsinchu, 30013, Taiwan
Universidad de Concepción, Departamento de Astronomía, Casilla 160-C, Concepción, Chile
Raemore Vista Observatory, Sierra Vista, AZ, United States
ELTE Gothard Astrophysical Observatory, Szent Imre h.u. 112, Szombathely, 9700, Hungary
Astronomical Institute of the Slovak Academy of Sciences
National Astronomical Research Institute of Thailand
HUN-REN-ELTE Exoplanet Research Group
Instituto de Astronomía
Fesenkov Astrophysical Institute
Aryabhatta Research Institute of Observational Sciences
Special Astrophysical Observatory
Department of Physics and Institute of Astronomy
Universidad de Concepción
Raemore Vista Observatory
ELTE Gothard Astrophysical Observatory
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