J/AJ/164/215ivo://CDS.VizieR/J/AJ/164/215doi:10.26093/cds/vizier.51640215CDSBouma L.G.Kerr R.Curtis J.L.Isaacson H.Hillenbrand L.A.,Howard A.W.Kraus A.L.Bieryla A.Latham D.W.Petigura E.A.Huber D.2023-01-23T14:38:26Z2022-12-19T07:40:54ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.fropen-star-clustersastrometryvisible-astronomytrigonometric-parallaxStellar positions and velocities from Gaia are yielding a new view of open cluster dispersal. Here we present an analysis of a group of stars spanning Cepheus (l=100{deg}) to Hercules (l=40{deg}), hereafter the Cep-Her complex. The group includes four Kepler objects of interest: Kepler-1643b (Rp=2.32{+/-}0.13R{Earth}, P=5.3days), KOI-7368b (Rp=2.22{+/-}0.12R{Earth}, P=6.8days), KOI-7913Ab (Rp=2.34{+/-}0.18R{Earth}, P=24.2days), and Kepler-1627 Ab (Rp=3.85{+/-}0.11R{Earth}, P=7.2days). The latter Neptune-sized planet is in part of the Cep-Her complex called the {delta}Lyr cluster. Here we focus on the former three systems, which are in other regions of the association. Based on kinematic evidence from Gaia, stellar rotation periods from TESS, and spectroscopy, these three objects are also ~40 million years (Myr) old. More specifically, we find that Kepler-1643 is 46_-7_^+9^Myr old, based on its membership in a dense subcluster of the complex called RSG-5. KOI-7368 and KOI-7913 are 36_-8_^+10^Myr old, and are in a diffuse region that we call CH-2. Based on the transit shapes and high-resolution imaging, all three objects are most likely planets, with false-positive probabilities of 6x10^-9^, 4x10^-3^, and 1x10^-4^ for Kepler-1643, KOI-7368, and KOI-7913, respectively. These planets demonstrate that mini-Neptunes with sizes of ~2 Earth radii exist at ages of 40Myr.2022AJ....164..215Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/164/215CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/106/1059 : Lithium in the Pleiades (Soderblom+, 1993)J/A+A/372/862 : Lithium abundances in IC 2602 and IC 2391 (Randich+, 2001)J/A+A/439/1137 : PHOENIX model chromospheres of M dwarfs (Fuhrmeister+, 2005)J/ApJS/190/1 : A survey of stellar families (Raghavan+, 2010)J/other/Nat/486.375 : Stellar parameters of KOI stars (Buchhave+, 2012)J/AJ/147/146 : Spectroscopy of Tuc-Hor candidate members (Kraus+, 2014)J/ApJS/211/24 : Rotation periods of Kepler MS stars (McQuillan+, 2014)J/ApJ/804/146 : Atmospheric parameters for nearby B-F stars (David+, 2015)J/AJ/152/8 : Impact of stellar mult. on planetary systems I. (Kraus+, 2016)J/ApJ/822/86 : False positive probabilities Q1-Q17 DR24 KOIs (Morton+, 2016)J/MNRAS/461/794 : Scorpius-Centaurus K-Type Stars (Pecaut+, 2016)J/AJ/152/113 : Pleiades members K2 light curves. I. Periods (Rebull+, 2016)J/A+A/595/A22 : 9 new open clusters within 500pc from the Sun (Roser+, 2016)J/ApJ/842/83 : Praesepe members rotational periods K2 LCs (Douglas+, 2017)J/AJ/154/109 : California-Kepler Survey. III. Planet radii (Fulton+, 2017)J/AJ/154/107 : California-Kepler Survey. I. 1305 stars (Petigura+, 2017)J/ApJ/836/77 : Library of high-S/N optical spectra of FGKM stars (Yee+, 2017)J/ApJ/855/115 : Lithium abundances of KOIs from CKS spectra (Berger+, 2018)J/A+A/613/A63 : Lithium content for 148 Pleiades stars (Bouvier+, 2018)J/A+A/618/A93 : Gaia DR2 open clusters in the Milky Way (Cantat-Gaudin+, 2018)J/MNRAS/476/908 : Chromospheric activity in 4 open clusters (Fang+, 2018)J/A+A/616/A10 : 46 open clusters GaiaDR2 HRdiagrams (Gaia Collaboration, 2018)J/AJ/155/89 : California-Kepler Survey (CKS). IV. Planets (Petigura+, 2018)J/A+A/612/A99 : Gaia-ESO Survey in 7 open star cluster fields (Randich+, 2018)J/AJ/155/196 : Analysis of K2 LCs members of USco & {rho}Oph (Rebull+, 2018)J/ApJS/235/38 : Kepler planetary cand VIII. DR25 reliability (Thompson+, 2018)J/A+A/620/A172 : Solar neighbourhood young stars 3D mapping (Zari+, 2018)J/AJ/158/77 : Candidates & members of Pisces-Eridanus stream (Curtis+, 2019)J/A+A/623/A112 : The Sco OB2 population from Gaia DR2 data (Damiani+, 2019)J/AJ/158/122 : Local structure &star formation history of MW (Kounkel+, 2019)J/ApJ/870/32 : Kinematics in young star clusters & associations (Kuhn+, 2019)J/A+A/625/A135 : Galactic interstellar dust Gaia2MASS 3Dmaps (Lallement+, 2019)J/A+A/622/L13 : Stellar stream in Gaia DR2 discovery (Meingast+, 2019)J/A+A/625/L13 : TESS light curve of beta Pictoris (Zieba+, 2019)J/AJ/160/239 : Cluster difference imaging photo. survey. II. (Bouma+, 2020)J/ApJ/904/140 : Ruprecht 147 members & rot. data 5 other cl. (Curtis+, 2020)J/ApJ/903/96 : MUTA; the {mu}Tau Association (Gagne+, 2020)J/A+A/634/A1 : NGC 1068 GRAVITY reconstructed image (GRAVITY+, 2020)J/MNRAS/496/2422 : Abundances 42 Pisces-Eridanus stream stars (Hawkins+, 2020)J/MNRAS/495/4924 : Exoplanets in Southern open clusters (Nardiello+, 2020)J/AJ/159/273 : Taurus members & nonmembers with K2 data (Rebull+, 2020)J/A+A/638/A9 : A census of the near-by Psc-Eri stellar stream (Roeser+, 2020)J/AJ/162/197 : Photo., rotation & Li in open cluster NCG2516 (Bouma+, 2021)J/A+A/649/A6 : Gaia Catalogue of Nearby Stars-GCNS (Gaia collaboration, 2021)J/A+A/647/A137 : 800pc tital tail of Hyades (Jerabkova+, 2021)J/A+A/645/A84 : Coronae of nearby star clusters (Meingast+, 2021)J/AJ/161/171 : THYME. V. Discovering stellar association (Tofflemire+, 2021)J/AJ/163/121 : Radial velocity and light curve of Kepler 1627A (Bouma+, 2022)J/AJ/163/156 : THYME. VI. TOI-1227 radial velocity (Mann+, 2022)J/AJ/163/179 : The California-Kepler Survey. X. (Petigura+, 2022)J/AJ/164/80 : Periods & supporting data UCL/LCC non/members (Rebull+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/164/215https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/164/215http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/164/215https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/164/215https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/164/215http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/164/215GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/164/215/table2 (Candidate Cep-Her members observed by Kepler)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/164/215/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/164/215/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/164/215/table2?GETtext/xml+votable180.050000true297.4098640.897190.005555555555555556Cone search capability for table J/AJ/164/215/table3 (Rotation periods and kinematics for candidate RSG-5 and CH-2 members)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/164/215/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/164/215/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/164/215/table3?GETtext/xml+votable180.050000true291.0230646.438430.0055555555555555565/3646 3689 3694-3698 3704 3706 3730-3732 3735-3737 3776 3780 3783 3789 3793 6/14567 14573 14578 14581-14583 14589 14591 14655 14698 14702 14733-14735 14739 14741-14744 14746-14747 14749-14752 14754 14760 14762-14764 14768 14770-14772 14774-14775 14796-14798 14830 14914-14915 14917-14919 14932-14934 14936 14938 14952-14953 14955-14956 14960-14961 14963-14965 14967 14969 14972 15040-15041 15108-15110 15112-15113 15115 15117-15118 15125-15130 15136-15138 15140-15141 15143 15153-15154 15160 15168-15169 15171 15176 15178 15181 15200-15202https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/164/215?format=asciiOpticaldefaultJ/AJ/164/215/table2Candidate Cep-Her members observed by KeplerSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDR2Gaia DR2 source identifiermeta.idEDR3Gaia EDR3 source identifiermeta.id;meta.mainKICKepler Input catalog identifiermeta.idintRAICRS[280/302] EDR3 Right Ascension (ICRS at Epoch=2016.5)degpos.eq.ra;meta.mainDEICRS[36/52] EDR3 Declination (ICRS at Epoch=2016.5)degpos.eq.dec;meta.main_RA.icrsRight ascension (ICRS) at Epoch=J2016.5 (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) at Epoch=J2016.5 (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decnullableindexedvb[-10.73/3.24] Latitudinal galactic velocitykm/sphys.veloc;pos.galacticfloatweight[0.02/0.54] Strength of connectivity to other candidate cluster membersstat.weightfloatvl*[-8.15/8.93] Longitudinal galactic velocity, v_l*_cos(b)km/sphys.veloc;pos.galacticfloatX[-8092/-7983] Galactocentric X position coordinatepcpos.cartesian.x;pos.galacticfloatY[245/373] Galactocentric Y position coordinatepcpos.cartesian.y;pos.galacticfloatZ[53/143] Galactocentric Z position coordinatepcpos.cartesian.z;pos.galacticfloatOffset[0.003/0.92] Separation between KIC and Gaia DR2 positionsarcsecpos.angDistancefloatDmag[-0.05/0.04] G-band difference between EDR3 and DR2 source matchmagphot.mag;arith.difffloatJ/AJ/164/215/table3Rotation periods and kinematics for candidate RSG-5 and CH-2 members_RA.icrsRight ascension (ICRS) at Epoch=J2016.5 (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) at Epoch=J2016.5 (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decnullableindexedrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEDR3Gaia EDR3 source identifiermeta.id;meta.mainRAICRS[284/306] Gaia EDR3 Right Ascension (ICRS at Epoch=2016.5)degpos.eq.ra;meta.mainDEICRS[41/53] Gaia EDR3 Declination (ICRS at Epoch=2016.5)degpos.eq.dec;meta.mainplx[2.8/4.03] Gaia EDR3 parallaxmaspos.parallax.trigfloatRUWE[0.74/3.37] Gaia EDR3 renormalized unit weight errorstat.errorfloatweight[0.001/0.74] Strength of connectivity to other candidate cluster membersstat.weightfloatvl*[2.09/6] Longitudinal galactic velocity, v_l_cos(b)km/sphys.veloc;pos.galacticfloatvb[-3.98/-1.64] Latitudinal galactic velocitykm/sphys.veloc;pos.galacticfloatX[-8101/-8047] Galactocentric X position coordinatepcpos.cartesian.x;pos.galacticfloatY[231/350] Galactocentric Y position coordinatepcpos.cartesian.y;pos.galacticfloatZ[40/105] Galactocentric Z position coordinatepcpos.cartesian.z;pos.galacticfloatBP-RP[-0.43/3.49] Gaia BP-RP color, minus E(BP-RP)magphot.color;em.opt.B;em.opt.RfloatGMAG[-0.68/12.96] Absolute G-band magnitude, corrected for extinctionmagphys.magAbs;phot.magfloatClusterCluster, RSG-5 or CH-2meta.id.parentcharProt-A[0.61/29.5]? Adopted rotation period if availabledtime.periodfloatnullableProt-T[0.61/13.4]? TESS rotation period if availabledtime.periodfloatnullableProt-Z[0.69/29.5]? ZTF rotation period if availabledtime.periodfloatnullableConfused[0/1] Boolean flag; 1=stars are photometrically blendedmeta.codeint