Swan, A;
Kenyon, SJ;
Farihi, J;
Dennihy, E;
Gänsicke, BT;
Hermes, JJ;
Melis, C;
(2021)
Collisions in a gas-rich white dwarf planetary debris disc.
Monthly Notices of the Royal Astronomical Society
, 506
(1)
pp. 432-440.
10.1093/mnras/stab1738.
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Abstract
WD 0145+234 is a white dwarf that is accreting metals from a circumstellar disc of planetary material. It has exhibited a substantial and sustained increase in 3-5 [Formula: see text]m flux since 2018. Follow-up Spitzer photometry reveals that emission from the disc had begun to decrease by late 2019. Stochastic brightening events superimposed on the decline in brightness suggest the liberation of dust during collisional evolution of the circumstellar solids. A simple model is used to show that the observations are indeed consistent with ongoing collisions. Rare emission lines from circumstellar gas have been detected at this system, supporting the emerging picture of white dwarf debris discs as sites of collisional gas and dust production.
| Type: | Article |
|---|---|
| Title: | Collisions in a gas-rich white dwarf planetary debris disc |
| Location: | England |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/stab1738 |
| Publisher version: | http://dx.doi.org/10.1093/mnras/stab1738 |
| Language: | English |
| Additional information: | Copyright © 2021 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. |
| Keywords: | circumstellar matter, planetary systems, stars: individual: WD 0145+234, white dwarfs |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10130094 |
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