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dc.contributor.authorLivingston, John H.
dc.contributor.authorCrossfield, Ian
dc.contributor.authorWerner, Michael W.
dc.contributor.authorGorjian, Varoujan
dc.contributor.authorPetigura, Erik A.
dc.contributor.authorCiardi, David R.
dc.contributor.authorDressing, Courtney D.
dc.contributor.authorFulton, Benjamin J.
dc.contributor.authorHirano, Teruyuki
dc.contributor.authorSchlieder, Joshua E.
dc.contributor.authorSinukoff, Evan
dc.contributor.authorKosiarek, Molly
dc.contributor.authorAkeson, Rachel
dc.contributor.authorBeichman, Charles A.
dc.contributor.authorBenneke, Björn
dc.contributor.authorChristiansen, Jessie L.
dc.contributor.authorHansen, Bradley M. S.
dc.contributor.authorHoward, Andrew W.
dc.contributor.authorIsaacson, Howard
dc.contributor.authorKnutson, Heather A.
dc.contributor.authorKrick, Jessica
dc.contributor.authorMartinez, Arturo O.
dc.contributor.authorSato, Bun'ei
dc.contributor.authorTamura, Motohide
dc.date.accessioned2020-12-23T19:17:28Z
dc.date.available2020-12-23T19:17:28Z
dc.date.issued2019-02-08
dc.identifier.citationJohn H. Livingston et al 2019 AJ 157 102en_US
dc.identifier.urihttp://hdl.handle.net/1808/31000
dc.description.abstractWe present precision 4.5 $\mu {\rm{m}}$ Spitzer transit photometry of eight planet candidates discovered by the K2 mission: K2-52 b, K2-53 b, EPIC 205084841.01, K2-289 b, K2-174 b, K2-87 b, K2-90 b, and K2-124 b. The sample includes four sub-Neptunes and two sub-Saturns, with radii between 2.6 and 18 ${R}_{\oplus }$ and equilibrium temperatures between 440 and 2000 K. In this paper we identify several targets of potential interest for future characterization studies, demonstrate the utility of transit follow-up observations for planet validation and ephemeris refinement, and present new imaging and spectroscopy data. Our simultaneous analysis of the K2 and Spitzer light curves yields improved estimates of the planet radii and multiwavelength information that helps validate their planetary nature, including the previously unvalidated candidate EPIC 205686202.01 (K2-289 b). Our Spitzer observations yield an order-of-magnitude increase in ephemeris precision, thus paving the way for efficient future study of these interesting systems by reducing the typical transit timing uncertainty in mid-2021 from several hours to a dozen or so minutes. K2-53 b, K2-289 b, K2-174 b, K2-87 b, and K2-90 b are promising radial velocity (RV) targets given the performance of spectrographs available today or in development, and the M3V star K2-124 hosts a temperate sub-Neptune that is potentially a good target for both RV and atmospheric characterization studies.en_US
dc.publisherIOP Publishingen_US
dc.rights© 2019. The American Astronomical Society. All rights reserved.en_US
dc.subjectPlanets and satellites: detectionen_US
dc.subjectPlanets and satellites: fundamental parametersen_US
dc.subjectTechniques: photometricen_US
dc.titleSpitzer Transit Follow-up of Planet Candidates from the K2 Missionen_US
dc.typeArticleen_US
kusw.kuauthorCrossfield, Ian
kusw.kudepartmentPhysics and Astronomyen_US
dc.identifier.doi10.3847/1538-3881/aaff69en_US
dc.identifier.orcidhttps://orcid.org/0000-0002-4881-3620en_US
dc.identifier.orcidhttps://orcid.org/0000-0003-0967-2893en_US
dc.identifier.orcidhttps://orcid.org/0000-0001-8189-0233en_US
dc.identifier.orcidhttps://orcid.org/0000-0003-3504-5316en_US
dc.identifier.orcidhttps://orcid.org/0000-0003-3618-7535en_US
dc.identifier.orcidhttps://orcid.org/0000-0001-5347-7062en_US
dc.identifier.orcidhttps://orcid.org/0000-0002-5658-0601en_US
dc.identifier.orcidhttps://orcid.org/0000-0002-6115-4359en_US
dc.identifier.orcidhttps://orcid.org/0000-0001-9674-1564en_US
dc.identifier.orcidhttps://orcid.org/0000-0002-8035-4778en_US
dc.identifier.orcidhttps://orcid.org/0000-0001-8638-0320en_US
dc.identifier.orcidhttps://orcid.org/0000-0002-0531-1073en_US
dc.identifier.orcidhttps://orcid.org/0000-0002-3311-4085en_US
dc.identifier.orcidhttps://orcid.org/0000-0001-8033-5633en_US
dc.identifier.orcidhttps://orcid.org/0000-0002-6510-0681en_US
kusw.oaversionScholarly/refereed, publisher versionen_US
kusw.oapolicyThis item meets KU Open Access policy criteria.en_US
dc.rights.accessrightsopenAccessen_US


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