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dc.contributor.authorBeatty, Thomas G.
dc.contributor.authorWong, Ian
dc.contributor.authorFetherolf, Tara
dc.contributor.authorLine, Michael R.
dc.contributor.authorShporer, Avi
dc.contributor.authorStassun, Keivan G.
dc.contributor.authorRicker, George R.
dc.contributor.authorSeager, Sara
dc.contributor.authorWinn, Joshua N.
dc.contributor.authorJenkins, Jon M.
dc.contributor.authorLouie, Dana R.
dc.contributor.authorSchlieder, Joshua E.
dc.contributor.authorSha, Lizhou
dc.contributor.authorTenenbaum, Peter
dc.contributor.authorYahalomi, Daniel A.
dc.date.accessioned2021-01-13T02:52:36Z
dc.date.available2021-01-13T02:52:36Z
dc.date.issued2020-10-20
dc.identifier.citationBeatty, T. G., Wong, I., Fetherolf, T., Line, M. R., Shporer, A., Stassun, K. G., ... & Yahalomi, D. A. (2020). The TESS Phase Curve of KELT-1b Suggests a High Dayside Albedo. The Astronomical Journal, 160(5), 211.en_US
dc.identifier.issn0004-6256
dc.identifier.doi10.3847/1538-3881/abb5aa
dc.identifier.urihttp://hdl.handle.net/10150/650751
dc.description.abstractWe measured the optical phase curve of the transiting brown dwarf KELT-1b (TOI 1476) using data from the TESS spacecraft. We found that KELT-1b shows significant phase variation in the TESS bandpass, with a relatively large phase amplitude of 234(-44)(+43) ppm and a secondary eclipse depth of 399 +/- 19 ppm. We also measured a marginal eastward offset in the dayside hot spot of 18.degrees 3 +/- 7.degrees 4 relative to the substellar point. We detected a strong phase-curve signal attributed to ellipsoidal distortion of the host star with an amplitude of 399 19 ppm. Our results are roughly consistent with the Spitzer phase curves of KELT-1b, but the TESS eclipse depth is deeper than expected. Our cloud-free 1D models of KELT-1b's dayside emission are unable to fit the full combined eclipse spectrum. Instead, the large TESS eclipse depth suggests that KELT-1b may have a significant dayside geometric albedo of A(g) similar to 0.5 in the TESS bandpass, which would agree with the tentative trend between equilibrium temperature and geometric albedo recently suggested by Wong et al. We posit that if KELT-1b has a high dayside albedo, it is likely due to silicate clouds that form on KELT-1b's nightside and are subsequently transported onto the western side of KELT-1b's dayside hemisphere before breaking up.en_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://iopscience.iop.org/info/page/text-and-data-miningen_US
dc.titleThe TESS Phase Curve of KELT-1b Suggests a High Dayside Albedoen_US
dc.typeArticleen_US
dc.identifier.eissn1538-3881
dc.contributor.departmentUniv Arizona, Dept Astron & Steward Observen_US
dc.identifier.journalASTRONOMICAL JOURNALen_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 Astronomical Journal
dc.source.volume160
dc.source.issue5
dc.source.beginpage211
refterms.dateFOA2021-01-13T02:52:49Z


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