Once in a blue moon: detection of ‘bluing' during debris transits in the white dwarf WD 1145+017

N. Hallakoun,S. Xu,D. Maoz,T. R. Marsh,V. D. Ivanov,V. S. Dhillon, M. C. P. Bours,S. G. Parsons,P. Kerry,S. Sharma,K. Su,S. Rengaswamy,P. Pravec,P. Kušnirák,H. Kučáková,J. D. Armstrong, C. Arnold, N. Gerard,L. Vanzi

Monthly Notices of the Royal Astronomical Society（2017）

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摘要

The first transiting planetesimal orbiting a white dwarf was recently detected in K2 data of WD 1145+017 and has been followed up intensively. The multiple, long and variable transits suggest the transiting objects are dust clouds, probably produced by a disintegrating asteroid. In addition, the system contains circumstellar gas, evident by broad absorption lines, mostly in the u΄ band, and a dust...

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techniques: photometric,eclipses,minor planets, asteroids: general,stars: individual: WD 1145+017,white dwarfs

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