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dc.contributor.authorMuñoz, Diego J.
dc.contributor.authorPetrovich, Cristobal
dc.date.accessioned2021-05-04T21:25:35Z
dc.date.available2021-05-04T21:25:35Z
dc.date.issued2020-11-19
dc.identifier.citationMuñoz, D. J., & Petrovich, C. (2020). Kozai Migration Naturally Explains the White Dwarf Planet WD1856 b. The Astrophysical Journal Letters, 904(1), L3.en_US
dc.identifier.issn2041-8205
dc.identifier.doi10.3847/2041-8213/abc564
dc.identifier.urihttp://hdl.handle.net/10150/658128
dc.description.abstractThe Jovian-sized object WD.1856.b transits a white dwarf (WD) in a compact 1.4 day orbit. Unlikely to have endured stellar evolution in its current orbit, WD. 1856.b is thought to have migrated from much wider separations. Because the WD is old, and a member of a well-characterized hierarchical multiple, the well-known Kozai mechanism provides an effective migration channel for WD.1856.b. The tidal dissipation that makes this mechanism possible is sensitive to the mass of WD.1856.b, which remains unconstrained by observations. Moreover, the lack of tides in the star allows us to directly connect the current semimajor axis to the pre-migration one, from which we can infer the initial conditions of the system. By further requiring that planets must survive all previous phases of stellar evolution before migrating, we are able to constrain the main-sequence semimajor axis of WD.1856.b to have been similar to 2.5 au, and its mass to be similar or equal to 0.7-3MJ. These mass limits put WD.1856.b firmly within the planet category. Furthermore, our inferred values imply that WD.1856.b was born a typical gas giant. We further estimate the occurrence rate of Kozai-migrated planets around WDs to be O(10(-3) - 10(-4)), suggesting that WD.1856.b is the only one in the TESS sample, but implying. (102) future detections by the LSST survey. In a sense, WD.1856.b was an ordinary Jovian planet that underwent an extraordinary dynamical history.en_US
dc.description.sponsorshipNational Science Foundationen_US
dc.language.isoenen_US
dc.publisherIOP PUBLISHING LTDen_US
dc.rights© 2020. The American Astronomical Society. All rights reserved.en_US
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectBinary starsen_US
dc.subjectWhite dwarf starsen_US
dc.subjectExoplanet dynamicsen_US
dc.subjectExoplanet evolutionen_US
dc.subjectMultiple starsen_US
dc.titleKozai Migration Naturally Explains the White Dwarf Planet WD1856 ben_US
dc.typeArticleen_US
dc.identifier.eissn2041-8213
dc.contributor.departmentUniv Arizona, Steward Observen_US
dc.identifier.journalASTROPHYSICAL JOURNAL LETTERSen_US
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en_US
dc.eprint.versionFinal published versionen_US
dc.source.journaltitleThe Astrophysical Journal
dc.source.volume904
dc.source.issue1
dc.source.beginpageL3
refterms.dateFOA2021-05-04T21:25:37Z


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