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dc.contributor.authorShporer, Avi
dc.contributor.authorCollins, Karen A.
dc.contributor.authorAstudillo-Defru, Nicola
dc.contributor.authorIrwin, Jonathan
dc.contributor.authorBonfils, Xavier
dc.contributor.authorCollins, Kevin I.
dc.contributor.authorMatthews, Elisabeth
dc.contributor.authorWinters, Jennifer G.
dc.contributor.authorAnderson, David R.
dc.contributor.authorArmstrong, James D.
dc.contributor.authorCharbonneau, David
dc.contributor.authorCloutier, Ryan
dc.contributor.authorDaylan, Tansu
dc.contributor.authorGan, Tianjun
dc.contributor.authorGünther, Maximilian N.
dc.contributor.authorHellier, Coel
dc.contributor.authorHorne, Keith
dc.contributor.authorHuang, Chelsea X.
dc.contributor.authorJensen, Eric L. N.
dc.contributor.authorKielkopf, John
dc.contributor.authorPalle, Enric
dc.contributor.authorSefako, Ramotholo
dc.contributor.authorStassun, Keivan G.
dc.contributor.authorTan, Thiam-Guan
dc.contributor.authorVanderburg, Andrew
dc.contributor.authorRicker, George R.
dc.contributor.authorLatham, David W.
dc.contributor.authorVanderspek, Roland
dc.contributor.authorSeager, Sara
dc.contributor.authorWinn, Joshua N.
dc.contributor.authorJenkins, Jon M.
dc.contributor.authorColon, Knicole
dc.contributor.authorDressing, Courtney D.
dc.contributor.authorLépine, Sébastien
dc.contributor.authorMuirhead, Philip S.
dc.contributor.authorRose, Mark E.
dc.contributor.authorTwicken, Joseph D.
dc.contributor.authorVillasenor, Jesus Noel
dc.date.accessioned2020-01-29T13:30:03Z
dc.date.available2020-01-29T13:30:03Z
dc.date.issued2020-02-10
dc.identifier.citationShporer , A , Collins , K A , Astudillo-Defru , N , Irwin , J , Bonfils , X , Collins , K I , Matthews , E , Winters , J G , Anderson , D R , Armstrong , J D , Charbonneau , D , Cloutier , R , Daylan , T , Gan , T , Günther , M N , Hellier , C , Horne , K , Huang , C X , Jensen , E L N , Kielkopf , J , Palle , E , Sefako , R , Stassun , K G , Tan , T-G , Vanderburg , A , Ricker , G R , Latham , D W , Vanderspek , R , Seager , S , Winn , J N , Jenkins , J M , Colon , K , Dressing , C D , Lépine , S , Muirhead , P S , Rose , M E , Twicken , J D & Villasenor , J N 2020 , ' GJ 1252 b : a 1.2 R ⊕ planet transiting an M-dwarf at 20.4 pc ' , Astrophysical Journal , vol. 890 , no. 1 . https://doi.org/10.3847/2041-8213/ab7020en
dc.identifier.issn0004-637X
dc.identifier.otherPURE: 266011400
dc.identifier.otherPURE UUID: 31ea55a4-2476-4e29-a7bc-a81099e712c1
dc.identifier.otherArXiv: http://arxiv.org/abs/1912.05556v1
dc.identifier.otherScopus: 85081399626
dc.identifier.otherWOS: 000537506400002
dc.identifier.urihttps://hdl.handle.net/10023/19377
dc.descriptionFunding: UK STFC grant ST/R000824/1 (K.H.).en
dc.description.abstractWe report the discovery of GJ 1252 b, a planet with a radius of 1.193 ± 0.074  and an orbital period of 0.52 days around an M3-type star (0.381 ± 0.019 , 0.391 ± 0.020 ) located 20.385 ± 0.019 pc away. We use Transiting Exoplanet Survey Satellite (TESS) data, ground-based photometry and spectroscopy, Gaia astrometry, and high angular resolution imaging to show that the transit signal seen in the TESS data must originate from a transiting planet. We do so by ruling out all false-positive scenarios that attempt to explain the transit signal as originating from an eclipsing stellar binary. Precise Doppler monitoring also leads to a tentative mass measurement of 2.09 ± 0.56 M ⊕. The host star proximity, brightness (V = 12.19 mag, K = 7.92 mag), low stellar activity, and the system's short orbital period make this planet an attractive target for detailed characterization, including precise mass measurement, looking for other objects in the system, and planet atmosphere characterization.
dc.language.isoeng
dc.relation.ispartofAstrophysical Journalen
dc.rightsCopyright © 2020 American Astronomical Society. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.3847/2041-8213/ab7020en
dc.subjectExoplanet astronomyen
dc.subjectM dwarf starsen
dc.subjectExoplanetsen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.subjectNDASen
dc.subject.lccQBen
dc.subject.lccQCen
dc.titleGJ 1252 b : a 1.2 R⊕ planet transiting an M-dwarf at 20.4 pcen
dc.typeJournal articleen
dc.contributor.sponsorScience & Technology Facilities Councilen
dc.description.versionPostprinten
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. St Andrews Centre for Exoplanet Scienceen
dc.identifier.doihttps://doi.org/10.3847/2041-8213/ab7020
dc.description.statusPeer revieweden
dc.identifier.grantnumberST/R00824/1en


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