WDJ220838.73+454434.04: a White Dwarf Companion in the AR Lacertae System
Abstract
We present WDJ220838.73+454434.04 (hereafter WD2208+454), a wide, co-moving white dwarf companion to the eclipsing binary system, AR Lacertae. The companion was discovered through the Backyard Worlds: Planet 9 citizen science collaboration. It has a separation of 21.″9 on the sky from the central eclipsing pair, translating to a projected separation of ~930 au. We present a review of the physical properties and orbital parameters of this new addition to the system.
- Publication:
-
Research Notes of the American Astronomical Society
- Pub Date:
- June 2022
- DOI:
- 10.3847/2515-5172/ac780a
- Bibcode:
- 2022RNAAS...6..127B
- Keywords:
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- Binary stars;
- Eclipsing binary stars;
- White dwarf stars;
- 154;
- 444;
- 1799