J/ApJS/247/28ivo://CDS.VizieR/J/ApJS/247/28doi:10.26093/cds/vizier.22470028CDSHardegree-Ullman K.K.Zink J.K.Christiansen J.L.Dressing C.D.,Ciardi D.R.Schlieder J.E.2021-09-06T18:16:41Z2020-05-28T06:35:55ZCDS support team

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

cds-question@unistra.frastronomical-object-identificationinfrared-photometryvisible-astronomyWide-band photometryinterstellar-reddeningmetallicitystellar-massesstellar-radiistellar-distancestellar-spectral-typesexoplanetsPrevious measurements of stellar properties for K2 stars in the Ecliptic Plane Input Catalog (EPIC) largely relied on photometry and proper motion measurements, with some added information from available spectra and parallaxes. Combining Gaia DR2 distances with spectroscopic measurements of effective temperatures, surface gravities, and metallicities from the Large Sky Area Multi-Object Fibre Spectroscopic Telescope (LAMOST) DR5, we computed updated stellar radii and masses for 26838 K2 stars. For 195250 targets without a LAMOST spectrum, we derived stellar parameters using random forest regression on photometric colors trained on the LAMOST sample. In total, we measured spectral types, effective temperatures, surface gravities, metallicities, radii, and masses for 222088 A, F, G, K, and M-type K2 stars. With these new stellar radii, we performed a simple reanalysis of 299 confirmed and 517 candidate K2 planet radii from Campaigns 1-13, elucidating a distinct planet radius valley around 1.9R_{Earth}_, a feature thus far only conclusively identified with Kepler planets, and tentatively identified with K2 planets. These updated stellar parameters are a crucial step in the process toward computing K2 planet occurrence rates.2020ApJS..247...28Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/247/28CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+, 2003)I/311 : Hipparcos, the New Reduction (van, 2007)I/322 : UCAC4 Catalogue (Zacharias+, 2012)III/272 : RAVE 4th data release (Kordopatis+, 2013)V/147 : The SDSS Photometric Catalogue, Release 12 (Alam, 2015)II/349 : The Pan-STARRS release 1 (PS1) Survey - DR1 (Chambers, 2016)IV/34 : K2 Ecliptic Plane Input Catalog (EPIC) (Huber+, 2017)V/153 : LAMOST DR4 catalogs (Luo+, 2018)I/345 : Gaia DR2 (Gaia, 2018)I/347 : Distances to 1.33 billion stars in Gaia DR2 (Bailer-Jones+, 2018)V/164 : LAMOST DR5 catalogs (Luo+, 2019)J/A+AS/141/371 : Low-mass stars isochrones (Girardi+, 2000)J/AJ/134/2398 : Stellar SEDs in SDSS and 2MASS filters (Covey+, 2007)J/PASP/121/117 : Fe & Ti abund. of 12 low-metallicity M stars (Woolf+, 2009)J/other/RAA/11.924 : Atmospheric parameters for 771 stars (Wu+, 2011)J/AJ/142/112 : KIC photometric calibration (Brown+, 2011)J/ApJ/748/93 : K-band spectra for 133 nearby M dwarfs (Rojas-Ayala+, 2012)J/ApJ/757/112 : Stellar diameters. II. K and M-stars (Boyajian+, 2012)J/AJ/145/52 : Abundances of late K & M dwarfs in binary syst. (Mann+, 2013)J/ApJ/779/188 : Spectra of nearby late K and M Kepler stars (Mann+, 2013)J/AJ/147/20 : Spectroscopy of 447 nearby M dwarfs (Newton+, 2014)J/ApJ/804/64 : Empirical and model parameters of 183 M dwarfs (Mann+, 2015)J/ApJ/807/45 : Potentially habitable planets (Dressing+, 2015)J/ApJS/220/16 : SpeX NIR survey of 886 nearby M dwarfs (Terrien+, 2015)J/ApJ/814/130 : Planet occurrence rates calculated for KOIs (Mulders+, 2015)J/ApJS/224/2 : K2 EPIC stellar properties for 138600 targets (Huber+, 2016)J/ApJS/226/7 : Planet cand. discovered using K2's 1st yr (Crossfield+, 2016)J/AJ/153/71 : Kepler follow-up obs. program. I. Imaging (Furlan+, 2017)J/ApJ/836/167 : K2 planetary syst. around low-mass stars. I. (Dressing+, 2017)J/AJ/153/212 : Obs. of binary stars at the WIYN telescope (Horch+, 2017)J/ApJS/230/16 : 05 through L3 empirical SDSS stellar spectra (Kesseli+, 2017)J/AJ/154/109 : California-Kepler Survey. III. Planet radii (Fulton+, 2017)J/AJ/154/207 : K2 planetary systems orbiting low-mass stars (Dressing+, 2017)J/AJ/155/21 : Planet candidates from K2 campaigns 5-8 (Petigura+, 2018)J/AJ/155/136 : Planets around bright stars in K2 campaigns 0-10 (Mayo+, 2018)J/AJ/156/18 : APOGEE DR14: companions of evolved stars (Price-Whelan+, 2018)J/ApJ/866/99 : Radii of KIC stars & planets using Gaia DR2 (Berger+, 2018)J/AJ/156/254 : CKS. VI. Kepler multis & singles (Weiss+, 2018)J/AJ/156/264 : CKS. VII. Planet radius gap (Fulton+, 2018)J/ApJ/871/63 : How to constrain your M dwarf. II. (Mann+, 2019)J/AJ/157/216 : Stellar mult. rate of M dwarfs within 25pc (Winters+, 2019)J/AJ/158/75 : M dwarfs planet occurrence rates (Hardegree-Ullman+, 2019)J/AJ/158/87 : Cool dwarfs in K2 Campaigns 1-17 (Dressing+, 2019)J/ApJS/244/11 : Planet candidates and EBs in K2 campaigns 0-8 (Kruse+, 2019)J/AJ/159/154 : Pap. II. Campaign 5 K2 mission exoplanet cand. (Zink+, 2020)http://keplerscience.arc.nasa.gov/k2-fields.html : K2 campaign fields & dateshttp://exoplanetarchive.ipac.caltech.edu/ : NASA exoplanet archivehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/247/28https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/247/28http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/247/28https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/247/28https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/247/28http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/247/28GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/247/28/table3 (Refined K2 planet parameters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/247/28/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/247/28/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/247/28/table3?GETtext/xml+votable180.050000true182.7001869-6.2942050.005555555555555556Cone search capability for table J/ApJS/247/28/table1 (K2 stellar parameters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/247/28/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/247/28/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/247/28/table1?GETtext/xml+votable180.050000true181.9844511-8.15220080.0055555555555555563/73 456 4/17 19 22 25 28 29 64 65 267 270 271 282 289 304 1082 1126 1127 1133 1144 1146 1152 1154 1160 1161 1168 1169 1171 1512 1514 1515 1591 1597 1599 1603 1606 1609 1612 1635 1640 1641 1686 1687 1692 1693 1712 1715 1716 1718 1719 1730 1809 1812 1813 1814 1830 1834 1920 2684 2686 2687 2770 2772 2773 2776 2777 2779 2780 3003 5/67 73 75 80 82 84 85 92 94 95 120 264 266 268 272 273 274 1063 1067 1073 1074 1075 1077 1078 1079 1120 1122 1123 1132 1134 1155 1164 1165 1167 1200 1204 1220 1222 1224 1225 1226 4287 4322 4323 4326 4327 4332 4334 4345 4347 4499 4502 4503 4528 4529 4531 4537 4540 4541 4543 4546 4556 4582 4583 4588 4590 4612 4613 4614 4620 4622 4623 4624 4627 4629 4631 4634 4652 4653 4654 4656 4657 4658 4660 4664 4665 4680 4681 4683 4688 4690 4696 4698 4699 4708 4709 4720 5870 5871 5877 5879 5882 5883 5884 5885 5887 6026 6027 6028 6030 6031 6042 6054 6055 6064 6072 6074 6356 6357 6358 6361 6363 6387 6394 6395 6401 6402 6403 6404 6406 6407 6409 6411 6418 6419 6422 6423 6428 6430 6431 6433 6452 6453 6454 6528 6529 6531 6537 6538 6539 6552 6568 6569 6570 6572 6573 6574 6576 6725 6726 6727 6733 6735 6736 6738 6739 6742 6743 6757 6761 6763 6764 6766 6776 6777 6778 6780 6852 6854 6855 6857 6859 6870 6884 6885 6887 6896 6897 6900 6914 6915 6926 6944 6945 6946 6952 7199 7210 7211 7212 7213 7217 7222 7224 7233 7235 7244 7245 7260 7261 7262 7312 7314 7315 7326 7328 7329 7331 7332 7333 7335 7344 7424 10709 10715 10717 10719 10727 10733 10735 10741 11039 11061 11063 11069 11075 11076 11077 11079 11087 11096 11097 11098 11100 11101 11112 11113 11115 11126 11128 11129 11130 11180 11182 11192 11194 11216 12006 12007 12016 12017 12018 12022 12023 12024 12026 12027 12030 12125 12127 6/260 261 263 265 266 267 289 291 297 334 335 344 346 347 348 349 351 373 374 375 388 389 391 397 399 437 439 484 485 486 496 497 1061 1063 1076 1077 1100 1101 1102 1160 4207 4223 4245 4246 4247 4250 4251 4262 4263 4265 4290 4291 4304 4306 4307 4486 4506 4534 4540 4613 4615 4645 4664 4665 4756 4757 4759 4804 4805 4820 4886 4892 4908 4909 4910 4912 4914 4992 4993 17071 17082 17083 17086 17087 17117 17130 17139 17142 17143 17145 17147 17299 17302 17303 17332 17333 17334 17340 17342 17346 17352 17354 17376 17377 17379 17385 17392 17394 17400 17402 17973 17975 17981 17987 17990 17991 18002 18003 18006 18007 18120 18121 18123 18145 18147 18168 18169 18171 18177 18178 18179 18180 18182 18188 18190 18191 18202 18203 18206 18208 18210 18213 18216 18218 18219 18222 18223 18228 18230 18232 18233 18234 18236 18320 18322 18326 18327 18356 18357 18366 18376 18378 18400 18460 18461 18462 18484 18486 18487 18504 18513 18520 18522 18530 18531 18532 18533 18534 18540 18542 18544 18548 18549 18551 18557 18592 18593 18596 18597 18599 18605 18607 18620 18621 18636 18637 18638 18646 18648 18649 18650 18652 18664 18665 18668 18669 18674 18680 18728 18729 18758 18764 18766 18788 18790 18791 18820 18821 18823 18884 18885 19537 19540 19541 19712 19713 19716 19717 19728 23419 23422 23423 23470 23471 23479 23505 23514 23515 23522 23523 23524 23526 23545 23546 23547 24102 24103 24174 24208 24210 24213 24260 24264 24266 24267 24300 24302 24927 25083 25421 25422 25423 25436 25438 25441 25443 25448 25449 25451 25533 25534 25535 25541 25542 25543 25545 25570 25571 25573 25601 25602 25603 25622 25632 25633 25635 25641 25642 25643 25665 25666 25667 25670 25671 25681 25682 25683 25684 25686 25687 25716 25718 25719 25728 25729 25741 25771 25774 25780 25781 25783 25820 25824 25826 25828 25829 25831 25840 25842 25864 25890 25896 25898 26121 26142 26143 26145 26146 26147 26216 26218 26284 26285 26286 26300 26302 26310 26312 26313 26314 26336 26899 26928 26929 26931 26939 26948 26950 26961 26963 26964 26966 27023 27025 27034 27037 27039 27049 27050 27051 27060 27061 27063 27118 27124 27125 27128 27221 27223 27229 27412 27414 27415 27425 27426 27427 27432 27433 27435 27474 27486 27487 27524 27525 27527 27545 27592 27593 27594 27596 27597 27599 27604 27608 27609 27610 27648 27649 27651 27652 27654 27655 27665 27672 27674 27698 27788 27789 27790 27792 27794 27812 28192 28194 28782 28783 28787 28790 28792 28793 28795 28825 28826 28827 28830 28834 28835 28837 28838 28839 28858 28861 28874 28875 28877 28880 28881 28884 28885 28887 28893 28900 28902 28903 28904 28905 28906 28908 28910 28911 28918 28922 28929 28931 28965 28967 28972 28984 28985 28987 28988 29052 29053 29056 29088 29102 29105 29106 29112 29113 29115 29120 29121 29124 29253 29296 29297 29298 29302 29308 29321 29337 29338 29360 29362 29363 29368 29380 29381 29382 29384 29385 29440 29443 29700 29702 29704 29706 29728 29730 30736 30738 30744 30752 30753 30754 42494 42495 42843 42845 42846 42847 42859 42864 42865 42867 42874 42902 42903 42905 42906 42907 42928 42929 42931 42937 42938 42939 42960 42961 42970 42973 42974 42975 44149 44150 44151 44153 44155 44241 44251 44273 44285 44294 44295 44297 44298 44299 44312 44313 44314 44338 44341 44343 44344 44346 44347 44396 44398 44409 44412 44413 44414 44456 44457 44459 44510 44524 44525 44526 44528 44529 44530 44532 44711 44717 44718 44719 44726 44727 44732 44733 44734 44774 44780 44781 44782 44804 44805 44807 44816 44817 44818 44820 44821 44823 47982 48014 48015 48022 48023 48036 48037 48039 48043 48045 48046 48047 48076 48077 48083 48086 48087 48102 48103 48113 48114 48115 48116 48126 48127 48478 48479 48497 48596 48597 48599 48605 48607 48629 48810 488118.650015785639275e-20 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/247/28?format=asciiOpticalInfrareddefaultJ/ApJS/247/28/table3Refined K2 planet parametersSpTSpectral Typesrc.spTypecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEPIC[201110617/247445728] EPIC IDmeta.id.parentlongIDPlanet candidate IDmeta.id;meta.maindoublePlanetConfirmed Planet Namemeta.idcharRp/R*[0.006/0.8] Ratio, Planet/Star radiusphys.size;arith.ratiodoubleE_Rp/R*[0.0002/0.4] Upper uncertainty in Rp/R*stat.error;stat.maxdoublee_Rp/R*[0.0004/0.2] Lower uncertainty in Rp/R*stat.errordoublePer[0.17/80] Perioddtime.perioddoubleE_Per[6.3e-7/70] Upper uncertainty in Perdstat.error;stat.maxdoublee_Per[6.3e-7/20] Lower uncertainty in Perdstat.errordoubler_Per[1/7] Reference for period and Rp/R* (1)meta.ref;pos.frameintTeff[3360/8336] Surface effective temperatureKphys.temperature.effectiveintE_Teff[11/138] Uncertainty in TeffKstat.error;stat.maxintRstar[0.2/60.2] Stellar radiussolRadphys.size.radiusfloatE_Rstar[0.008/20.1] Upper uncertainty in RstarsolRadstat.error;stat.maxfloate_Rstar[0.008/13.5] Lower uncertainty in RstarsolRadstat.errorfloatMstar[-0.05/16.7] Stellar masssolMassphys.massfloatE_Mstar[0.006/19] Upper uncertainty in MstarsolMassstat.error;stat.maxfloate_Mstar[0.006/9] Lower uncertainty in MstarsolMassstat.errorfloatLstar[0.01/833] Stellar luminositysolLumphys.luminosityfloatE_Lstar[0.002/750] Upper uncertainty in LstarsolLumstat.error;stat.maxfloate_Lstar[0.002/485] Lower uncertainty in LstarsolLumstat.errorfloata[0.005/0.4] Planet, semi-major axisauphys.angSize.smajAxis;src.orbitaldoubleE_a[4e-5/0.2] Upper uncertainty in aaustat.error;stat.maxdoublee_a[4.2e-5/0.08] Lower uncertainty in aaustat.errordoubleFp[0.7/3593074] Ratio of incident flux relative to Earth incident fluxEarthphot.flux;arith.ratiodoubleE_Fp[0.1/4551392] Upper uncertainty in FpEarthstat.error;stat.maxdoublee_Fp[0.1/2136602] Lower uncertainty in FpEarthstat.errordoubleRp[0.6/823] Planet radius, Earth units(6.3781x10+6m)phys.size.radiusfloatE_Rp[0.04/927] Upper uncertainty in Rp(6.3781x10+6m)stat.error;stat.maxfloate_Rp[0.06/481] Lower uncertainty in Rp(6.3781x10+6m)stat.errorfloatPCatDisplay data from Crossfield+, 2016, J/ApJS/226/7 ; Kruse+, 2019, J/ApJS/244/11 and Mayo+, 2018, J/AJ/155/136 within 3"meta.ref.urlintnullableSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions from EPIC stars in IV/34 (right ascension part)degpos.eq.ra;meta.main_DEPositions from EPIC stars in IV/34 (declination part)degpos.eq.dec;meta.mainJ/ApJS/247/28/table1K2 stellar parameterse_imag[0.001/0.9] Uncertainty in imagmagstat.error;phot.mag;em.opt.Ifloatgmag[8/22] Apparent g band magnitude (1)magphot.mag;em.opt.BfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNpNumber of planet measurements for this star (link to Table 3)meta.numberintnullableEPIC[201048855/251411166] EPIC identifiermeta.id;meta.mainlongprimaryCamp[1/18] K2 Campaigns (1 to 18; from 2014 May to July 2018)meta.id;obsintPS? Pan-STARRS objIDmeta.id.crossnullableGaiaGaia DR2 identifiermeta.id.crossLAMOST? LAMOST ObsIDmeta.id.crosslongnullablee_gmag[0/0.9] Uncertainty in gmagmagstat.error;phot.mag;em.opt.Bfloatrmag[7.3/21] Apparent r band magnitude (1)magphot.mag;em.opt.Rfloate_rmag[0/0.9] Uncertainty in rmagmagstat.error;phot.mag;em.opt.Rfloatimag[6.4/19.1] Apparent i band magnitude (1)magphot.mag;em.opt.IfloatJmag[4.3/17.4] 2MASS J band magnitudemagphot.mag;em.IR.Jfloate_Jmag[0.01/0.4] Uncertainty in Jmagmagstat.error;phot.mag;em.IR.JfloatHmag[3.4/16.8] 2MASS H band magnitudemagphot.mag;em.IR.Hfloate_Hmag[0.005/0.4] Uncertainty in Hmagmagstat.error;phot.mag;em.IR.HfloatKsmag[3.1/16.4] 2MASS Ks band magnitudemagphot.mag;em.IR.Kfloate_Ksmag[0.01/0.6] Uncertainty in Ksmagmagstat.error;phot.mag;em.IR.KfloatKpmag[7/20] Kepler band magnitude (2)magphot.mag;em.optfloate_Kpmag[0.001/1] Uncertainty in Kpmagmagstat.error;phot.mag;em.IR.KfloatDist[10.6/17713] Gaia DR2 based distance (3)pcpos.distance;pos.heliocentricdoubleE_Dist[0.01/5686] Upper uncertainty in Distpcstat.error;stat.maxfloate_Dist[0.01/4328] Lower uncertainty in Distpcstat.errorfloatAg[0.001/12.7] Reddening in the g band (4)phys.absorptionfloatAr[0.001/9.3] Reddening in the r band (4)phys.absorptionfloatAi[0.001/7] Reddening in the i band (4)phys.absorptionfloatAJ[0/2.5] Reddening in the J band (4)phys.absorptionfloatAH[0/1.3] Reddening in the H band (4)phys.absorptionfloatAKs[0/0.7] Reddening in the Ks band (4)phys.absorptionfloatgMag[-2.5/14.3] Absolute g band magnitude (5)magphys.magAbsfloatE_gMag[0.005/1.2] Upper uncertainty in gMagmagstat.error;stat.maxfloate_gMag[0.005/1.2] Lower uncertainty in gMagmagstat.error;phot.magfloatrMag[-2.4/13.3] Absolute r band magnitude (5)magphys.magAbsfloatE_rMag[0.006/1.2] Upper uncertainty in rMagmagstat.error;stat.maxfloate_rMag[0.005/1.2] Lower uncertainty in rMagmagstat.error;phot.magfloatiMag[-2.9/12.1] Absolute i band magnitude (5)magphys.magAbsfloatE_iMag[0.005/1.2] Upper uncertainty in iMagmagstat.error;stat.maxfloate_iMag[0.005/1.2] Lower uncertainty in iMagmagstat.error;phot.magfloatJMag[-4.6/10.8] Absolute J band magnitude (5)magphys.magAbs;em.IR.JfloatE_JMag[0.01/0.9] Upper uncertainty in JMagmagstat.error;stat.maxfloate_JMag[0.01/1.1] Lower uncertainty in JMagmagstat.error;phot.mag;em.IR.JfloatHMag[-5.4/10.6] Absolute H band magnitude (5)magphys.magAbs;em.IR.HfloatE_HMag[0.01/0.9] Upper uncertainty in HMagmagstat.error;stat.maxfloate_HMag[0.01/1.2] Lower uncertainty in HMagmagstat.error;phot.mag;em.IR.HfloatKsMag[-5.6/10.5] Absolute Ks band magnitude (5)magphys.magAbs;em.IR.KfloatE_KsMag[0.01/0.9] Upper uncertainty in KsMagmagstat.error;stat.maxfloate_KsMag[0.01/1.1] Lower uncertainty in KsMagmagstat.error;phot.mag;em.IR.KfloatSpTSpectral Type (6)src.spTypecharTeff[3130/8498] Effective surface temperature (6)Kphys.temperature.effectiveinte_Teff[3/596] Uncertainty in TeffKstat.error;phys.temperature.effectiveintlogg[0.3/5.6] log of surface gravity (6)log(cm.s**-2)phys.gravityfloatE_logg[0.002/1] Upper uncertainty in logglog(cm.s**-2)stat.error;stat.maxfloate_logg[0.002/1] Lower uncertainty in logglog(cm.s**-2)stat.errorfloat[Fe/H][-2.5/0.7] Metallicity (6)phys.abund.Zfloate_[Fe/H][0.003/0.6] Uncertainty in [Fe/H]stat.error;phys.abund.FefloatRstar[0.03/77] Stellar radius, solar units (7)solRadmeta.unit;phys.size.radiusfloatE_Rstar[0.001/35] Upper uncertainty in RstarsolRadstat.error;stat.maxfloate_Rstar[0.001/22] Lower uncertainty in RstarsolRadstat.errorfloatMstar[-0.8/979] Stellar mass, solar units (7)solMassmeta.unit;phys.massfloatE_Mstar[0/320] Upper uncertainty in MstarsolMassstat.error;stat.maxfloate_Mstar[0/233] Lower uncertainty in MstarsolMassstat.errorfloat2MDisplay the 2MASS data (Cutri+ 2003, II/246) within 3"meta.ref.urlchar_RAPositions (J2000) from Gaia (I/345) (right ascension part)degpos.eq.ra;meta.mainindexed_DEPositions (J2000) from Gaia (I/345) (declination part)degpos.eq.dec;meta.mainindexed