Please use this identifier to cite or link to this item: http://hdl.handle.net/2381/37073
Title: HIGH-SPEED PHOTOMETRY OF THE DISINTEGRATING PLANETESIMALS AT WD1145+017: EVIDENCE FOR RAPID DYNAMICAL EVOLUTION
Authors: Gaensicke, B. T.
Aungwerojwit, A.
Marsh, T. R.
Dhillon, V. S.
Sahman, D. I.
Veras, D.
Farihi, J.
Chote, P.
Ashley, R.
Arjyotha, S.
Rattanasoon, S.
Littlefair, S. P.
Pollacco, D.
Burleigh, Matthew Roger
First Published: 10-Feb-2016
Publisher: IOP PUBLISHING LTD
Citation: Astrophysical Journal Letters, 2016, 818 (1), L7
Abstract: We obtained high-speed photometry of the disintegrating planetesimals orbiting the white dwarf WD 1145+017, spanning a period of four weeks. The light curves show a dramatic evolution of the system since the first observations obtained about seven months ago. Multiple transit events are detected in every light curve, which have varying durations (sime3–12 minutes) and depths (sime10%–60%). The time-averaged extinction is sime11%, much higher than at the time of the Kepler observations. The shortest-duration transits require that the occulting cloud of debris has a few times the size of the white dwarf, longer events are often resolved into the superposition of several individual transits. The transits evolve on timescales of days, both in shape and in depth, with most of them gradually appearing and disappearing over the course of the observing campaign. Several transits can be tracked across multiple nights, all of them recur on periods of sime4.49 hr, indicating multiple planetary debris fragments on nearly identical orbits. Identifying the specific origin of these bodies within this planetary system, and the evolution leading to their current orbits remains a challenging problem.
DOI Link: 10.3847/2041-8205/818/1/L7
ISSN: 2041-8205
eISSN: 2041-8213
Links: http://iopscience.iop.org/article/10.3847/2041-8205/818/1/L7/
http://hdl.handle.net/2381/37073
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2016. The American Astronomical Society. All rights reserved. Deposited with reference to the publisher’s archiving policy available on the SHERPA/RoMEO website.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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