Simultaneous infrared and optical observations of the transiting debris cloud around WD 1145+017

Zhou, G. ORCID: and Kedziora-Chudczer, L. and Bailey, J. and Marshall, J. P. and Bayliss, D. D. R. and Stockdale, C. and Nelson, P. and Tan, T. G. and Rodriguez, J. E. and Tinney, C. G. and Dragomir, D. and Colon, K. and Shporer, A. and Bento, J. and Sefako, R. and Horne, K. and Cochran, W. (2016) Simultaneous infrared and optical observations of the transiting debris cloud around WD 1145+017. Monthly Notices of the Royal Astronomical Society, 463 (4). pp. 4422-4432. ISSN 0035-8711

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We present multiwavelength photometric monitoring of WD 1145+017, a white dwarf exhibiting periodic dimming events interpreted to be the transits of orbiting, disintegrating planetesimals. Our observations include the first set of near-infrared light curves for the object, obtained on multiple nights over the span of 1 month, and recorded multiple transit events with depths varying between ∼20 and 50 per cent. Simultaneous near-infrared and optical observations of the deepest and longest duration transit event were obtained on two epochs with the Anglo-Australian Telescope and three optical facilities, over the wavelength range of 0.5-1.2 μm. These observations revealed no measurable difference in transit depths for multiple photometric pass bands, allowing us to place a 2σ lower limit of 0.8 μm on the grain size in the putative transiting debris cloud. This conclusion is consistent with the spectral energy distribution of the system, which can be fit with an optically thin debris disc with minimum particle sizes of 10^{+5}_{-3} μm.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 06 Feb 2022 23:41
Last Modified: 07 Feb 2022 00:07
Uncontrolled Keywords: planets and satellites: individual: WD 1145+017; white dwarfs; Astrophysics - Earth and Planetary Astrophysics
Fields of Research (2008): 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
Fields of Research (2020): 51 PHYSICAL SCIENCES > 5101 Astronomical sciences > 510109 Stellar astronomy and planetary systems
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Socio-Economic Objectives (2020): 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280120 Expanding knowledge in the physical sciences
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