Show simple item record

Files in this item


Item metadata

dc.contributor.authorCloutier, Ryan
dc.contributor.authorEastman, Jason D.
dc.contributor.authorRodriguez, Joseph E.
dc.contributor.authorAstudillo-Defru, Nicola
dc.contributor.authorBonfils, Xavier
dc.contributor.authorMortier, Annelies
dc.contributor.authorWatson, Christopher A.
dc.contributor.authorStalport, Manu
dc.contributor.authorPinamonti, Matteo
dc.contributor.authorLienhard, Florian
dc.contributor.authorHarutyunyan, Avet
dc.contributor.authorDamasso, Mario
dc.contributor.authorLatham, David W.
dc.contributor.authorCollins, Karen A.
dc.contributor.authorMassey, Robert
dc.contributor.authorIrwin, Jonathan
dc.contributor.authorWinters, Jennifer G.
dc.contributor.authorCharbonneau, David
dc.contributor.authorZiegler, Carl
dc.contributor.authorMatthews, Elisabeth
dc.contributor.authorCrossfield, Ian J. M.
dc.contributor.authorKreidberg, Laura
dc.contributor.authorQuinn, Samuel N.
dc.contributor.authorRicker, George
dc.contributor.authorVanderspek, Roland
dc.contributor.authorSeager, Sara
dc.contributor.authorWinn, Joshua
dc.contributor.authorJenkins, Jon M.
dc.contributor.authorVezie, Michael
dc.contributor.authorUdry, Stéphane
dc.contributor.authorTwicken, Joseph D.
dc.contributor.authorTenenbaum, Peter
dc.contributor.authorSozzetti, Alessandro
dc.contributor.authorSégransan, Damien
dc.contributor.authorSchlieder, Joshua E.
dc.contributor.authorSasselov, Dimitar
dc.contributor.authorSantos, Nuno C.
dc.contributor.authorRice, Ken
dc.contributor.authorRackham, Benjamin V.
dc.contributor.authorPoretti, Ennio
dc.contributor.authorPiotto, Giampaolo
dc.contributor.authorPhillips, David
dc.contributor.authorPepe, Francesco
dc.contributor.authorMolinari, Emilio
dc.contributor.authorMignon, Lucile
dc.contributor.authorMicela, Giuseppina
dc.contributor.authorMelo, Claudio
dc.contributor.authorde Medeiros, José R.
dc.contributor.authorMayor, Michel
dc.contributor.authorMatson, Rachel A.
dc.contributor.authorMartinez Fiorenzano, Aldo F.
dc.contributor.authorMann, Andrew W.
dc.contributor.authorMagazzú, Antonio
dc.contributor.authorLovis, Christophe
dc.contributor.authorLópez-Morales, Mercedes
dc.contributor.authorLopez, Eric
dc.contributor.authorLissauer, Jack J.
dc.contributor.authorLépine, Sébastien
dc.contributor.authorLaw, Nicholas
dc.contributor.authorKielkopf, John F.
dc.contributor.authorJohnson, John A.
dc.contributor.authorJensen, Eric L. N.
dc.contributor.authorHowell, Steve B.
dc.contributor.authorGonzales, Erica
dc.contributor.authorGhedina, Adriano
dc.contributor.authorForveille, Thierry
dc.contributor.authorFigueira, Pedro
dc.contributor.authorDumusque, Xavier
dc.contributor.authorDressing, Courtney D.
dc.contributor.authorDoyon, René
dc.contributor.authorDíaz, Rodrigo F.
dc.contributor.authorFabrizio, Luca Di
dc.contributor.authorDelfosse, Xavier
dc.contributor.authorCosentino, Rosario
dc.contributor.authorConti, Dennis M.
dc.contributor.authorCollins, Kevin I.
dc.contributor.authorCameron, Andrew Collier
dc.contributor.authorCiardi, David
dc.contributor.authorCaldwell, Douglas A.
dc.contributor.authorBurke, Christopher
dc.contributor.authorBuchhave, Lars
dc.contributor.authorBriceño, César
dc.contributor.authorBoyd, Patricia
dc.contributor.authorBouchy, François
dc.contributor.authorBeichman, Charles
dc.contributor.authorArtigau, Étienne
dc.contributor.authorAlmenara, Jose M.
dc.identifier.citationCloutier , R , Eastman , J D , Rodriguez , J E , Astudillo-Defru , N , Bonfils , X , Mortier , A , Watson , C A , Stalport , M , Pinamonti , M , Lienhard , F , Harutyunyan , A , Damasso , M , Latham , D W , Collins , K A , Massey , R , Irwin , J , Winters , J G , Charbonneau , D , Ziegler , C , Matthews , E , Crossfield , I J M , Kreidberg , L , Quinn , S N , Ricker , G , Vanderspek , R , Seager , S , Winn , J , Jenkins , J M , Vezie , M , Udry , S , Twicken , J D , Tenenbaum , P , Sozzetti , A , Ségransan , D , Schlieder , J E , Sasselov , D , Santos , N C , Rice , K , Rackham , B V , Poretti , E , Piotto , G , Phillips , D , Pepe , F , Molinari , E , Mignon , L , Micela , G , Melo , C , de Medeiros , J R , Mayor , M , Matson , R A , Martinez Fiorenzano , A F , Mann , A W , Magazzú , A , Lovis , C , López-Morales , M , Lopez , E , Lissauer , J J , Lépine , S , Law , N , Kielkopf , J F , Johnson , J A , Jensen , E L N , Howell , S B , Gonzales , E , Ghedina , A , Forveille , T , Figueira , P , Dumusque , X , Dressing , C D , Doyon , R , Díaz , R F , Fabrizio , L D , Delfosse , X , Cosentino , R , Conti , D M , Collins , K I , Cameron , A C , Ciardi , D , Caldwell , D A , Burke , C , Buchhave , L , Briceño , C , Boyd , P , Bouchy , F , Beichman , C , Artigau , É & Almenara , J M 2020 , ' A pair of TESS planets spanning the radius valley around the nearby mid-M dwarf LTT 3780 ' , Astronomical Journal , vol. 160 , no. 1 , 3 .
dc.identifier.otherPURE: 268623035
dc.identifier.otherPURE UUID: 6239700c-a2d3-4fcf-b7e2-445223a2e5f6
dc.identifier.otherBibCode: 2020AJ....160....3C
dc.identifier.otherORCID: /0000-0002-8863-7828/work/76386625
dc.identifier.otherWOS: 000540089800001
dc.identifier.otherScopus: 85087781347
dc.descriptionFunding: N.A.D. acknowledges support from FONDECYT 3180063.A.M. acknowledges support from the senior Kavli InstituteFellowships.J.G.W. is supported by a grant from the John Templeton Foundation. .C.Z. is supported by a Dunlap Fellowship at the Dunlap Institute for Astronomy & Astrophysics, funded through an endowment established by the Dunlap family and the University of Toronto. I.J.M.C. acknowledges support from the NSF through grant AST-1824644 and NASA through Caltech/JPL grant RSA-1610091. F.L. gratefully acknowledges a scholarship from the Fondation Zd̆nek et Michaela Bakala. M.S. thanks the Swiss National Science Foundation (SNSF) and Geneva University for their continuous support of our exoplanet researches. This work has been in particular carried out in the frame of the National Center for Competence in Research “PlanetS” supported by SNSF.C.A.W. acknowledges support from Science and Technology Facilities Council grant ST/P000312/1. N.C.S. acknowledges supported by FCT, Fundação para a Ciência e a Tecnologia, through national funds and by FEDER through COMPETE2020, Programa Operacional Competitividade e Internacionalização, by these grants: UID/FIS/04434/2019, UIDB/04434/2020, UIDP/04434/2020, PTDC/FIS-AST/32113/2017 & POCI-01-0145-FEDER-032113, PTDC/FIS-AST/28953/2017 & POCI-01-0145-FEDER-028953. M.Pi. gratefully acknowledges support from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement No. 313014 (ETAEARTH). J.R.M. acknowledges support by the CAPES, CNPq, and FAPERN Brazilian agencies.en
dc.description.abstractWe present the confirmation of two new planets transiting the nearby mid-M dwarf LTT 3780 (TIC 36724087, TOI-732, V = 13.07, Ks =8.204, Rs = 0.374 R⊙, Ms = 0.401 M⊙, d = 22 pc). The two planet candidates are identified in a single Transiting Exoplanet Survey Satellite sector and validated with reconnaissance spectroscopy, ground-based photometric follow-up, and high-resolution imaging. With measured orbital periods of Pb = 0.77, Pc = 12.25 days and sizes rp,b = 1.33 ± 0.07, rp,c = 2.30 ±0.16 R⊕, the two planets span the radius valley in period-radius space around low-mass stars, thus making the system a laboratory to test competing theories of the emergence of the radius valley in that stellar mass regime. By combining 63 precise radial velocity measurements from the High Accuracy Radial velocity Planet Searcher (HARPS) and HARPS-N, we measure planet masses of mp,b = 2.62-0.46+0.48 and mp,c = 8.6-1.3+1.6 M⊕, which indicates that LTT 3780b has a bulk composition consistent with being Earth-like, while LTT 3780c likely hosts an extended H/He envelope. We show that the recovered planetary masses are consistent with predictions from both photoevaporation and core-powered mass-loss models. The brightness and small size of LTT 3780, along with the measured planetary parameters, render LTT 3780b and c as accessible targets for atmospheric characterization of planets within the same planetary system and spanning the radius valley.
dc.relation.ispartofAstronomical 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 final published version of the work, which was originally published at
dc.subjectRadial velocityen
dc.subjectM dwarf starsen
dc.subjectExoplanet systemsen
dc.subjectTransit photometryen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.titleA pair of TESS planets spanning the radius valley around the nearby mid-M dwarf LTT 3780en
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews.St Andrews Centre for Exoplanet Scienceen
dc.description.statusPeer revieweden

This item appears in the following Collection(s)

Show simple item record