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WDJ220838.73+454434.04: a White Dwarf Companion in the AR Lacertae System

Bickle, Thomas P. and Jalowiczor, Peter A. and Casewell, Sarah L. and Faherty, Jacqueline K. and Kiman, Rocio and Schneider, Adam C. and Kirkpatrick, J. Davy and Meisner, Aaron M. and Kuchner, Marc J. and Caselden, Dan (2022) WDJ220838.73+454434.04: a White Dwarf Companion in the AR Lacertae System. Research Notes of the AAS, 6 (6). Art. No. 127. ISSN 2515-5172. doi:10.3847/2515-5172/ac780a.

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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.

Item Type:Article
Related URLs:
URLURL TypeDescription
Bickle, Thomas P.0000-0003-2235-761X
Jalowiczor, Peter A.0000-0002-4175-295X
Casewell, Sarah L.0000-0003-2478-0120
Faherty, Jacqueline K.0000-0001-6251-0573
Kiman, Rocio0000-0003-2102-3159
Schneider, Adam C.0000-0002-6294-5937
Kirkpatrick, J. Davy0000-0003-4269-260X
Meisner, Aaron M.0000-0002-1125-7384
Kuchner, Marc J.0000-0002-2387-5489
Caselden, Dan0000-0001-7896-5791
Additional Information:The Backyard Worlds: Planet 9 team would like to thank the many Zooniverse volunteers who have participated in this project. We would also like to thank the Zooniverse web development team for their work creating and maintaining the Zooniverse platform and the Project Builder tools. This material is supported by the National Science Foundation under grant Nos. 2007068, 2009136, and 2009177. This work has made use of data from the European Space Agency (ESA) mission Gaia (, processed by the Gaia Data Processing and Analysis Consortium (DPAC, Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. This publication makes use of data products from the Wide-field Infrared Survey Explorer, (WISE) which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/ California Institute of Technology, funded by the National Aeronautics and Space Administration.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Gaia Multilateral AgreementUNSPECIFIED
Issue or Number:6
Record Number:CaltechAUTHORS:20220920-520533300
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:117089
Deposited By: Tony Diaz
Deposited On:22 Sep 2022 19:34
Last Modified:22 Sep 2022 19:34

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