J/AJ/167/196ivo://CDS.VizieR/J/AJ/167/196doi:10.26093/cds/vizier.51670196CDSKar A.Henry T.J.Couperus A.A.Vrijmoet E.H.Jao W.-C.2025-02-12T20:07:48Z2024-10-11T08:31:04ZCDS support team

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

cds-question@unistra.frexoplanetsm-starsinfrared-photometryvisible-astronomyphotometryWe present the optical photometric variability of 32 planet-hosting M dwarfs within 25pc over timescales of months to decades. The primary goal of this project-A Trail to Life Around Stars (ATLAS)-is to follow the trail to life by revealing nearby M dwarfs with planets that are also "quiet," which may make them more amiable to habitability. There are 69 reported exoplanets orbiting the 32 stars discussed here, providing a rich sample of worlds for which environmental evaluations are needed. We examine the optical flux environments of these planets over month-long timescales for 23 stars observed by TESS, and find that 17 vary by less than 1% (~11mmag). All 32 stars are being observed at the CTIO/SMARTS 0.9m telescope, with a median duration of 19.1yr of optical photometric data in the VRI bands. We find over these extended timescales that six stars show optical flux variations less than 2%, 25 vary from 2% to 6% (~22-67mmag), and only one, Proxima Centauri, varies by more than 6%. Overall, LHS 1678 exhibits the lowest optical variability levels measured over all timescales examined, thereby providing one of the most stable photometric environments among the planets reported around M dwarfs within 25pc. More than 600 of the nearest M dwarfs are being observed at the 0.9m telescope in the RECONS program that began in 1999, and many more planet hosts will undoubtedly be revealed, providing more destinations to be added to the ATLAS sample in the future.2024AJ....167..196Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/167/196CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/337 : Gaia DR1 (Gaia Collaboration, 2016)IV/38 : TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019)J/A+A/410/671 : X-ray emission in cool main sequence stars (Messina+, 2003)J/AJ/141/21 : CCD distance estimates of SCR targets (Winters+, 2011)J/A+A/541/A9 : M dwarfs activity & radial velocity (Gomes da Silva+, 2012)J/A+A/556/A126 : GJ667C Doppler & activity data (Anglada-Escude+, 2013)J/A+A/549/A109 : HARPS XXXI. The M-dwarf sample (Bonfils+, 2013)J/MNRAS/432/1203 : Rotation periods of M-dwarf stars (McQuillan+, 2013)J/ApJ/764/3 : H{alpha} indices in M low-mass stars (Robertson+, 2013)J/ApJS/211/24 : Rotation periods of Kepler MS stars (McQuillan+, 2014)J/ApJ/807/45 : Habitable planets orbiting M dwarfs (Dressing+, 2015)J/AJ/150/6 : Solar neighborhood. XXXVI. Var. of M dwarfs (Hosey+, 2015)J/ApJ/809/77 : Transiting Exoplanet Survey Satellite (Sullivan+, 2015)J/AJ/152/141 : Solar neighborhood. XXXVII. RVs (Benedict+, 2016)J/AJ/154/124 : M dwarfs-long-term photometric variability (Clements+, 2017)J/ApJ/842/83 : Praesepe members rot. periods from K2 LCs (Douglas+, 2017)J/ApJ/834/85 : H{alpha} emission in nearby M dwarfs (Newton+, 2017)J/AJ/154/32 : Solar neighborhood. XXXIX. Nearby WDs (Subasavage+, 2017)J/AJ/155/265 : The solar neighborhood. XLIV. RECONS (Henry+, 2018)J/AJ/156/217 : Stellar data for M dwarfs in MEarth-South (Newton+, 2018)J/AJ/156/102 : TESS Input Catalog & Candidate Target List (Stassun+, 2018)J/A+A/629/A111 : L 98-59 (TOI 175) HARPS observations (Cloutier+, 2019)J/ApJ/879/100 : Rot. periods for Hyades & Praesepe members (Douglas+, 2019)J/ApJ/904/140 : Ruprecht 147 & rot. data for 5 other cl. (Curtis+, 2020)J/A+A/638/A20 : M dwarfs X-ray activity & rot. relations (Magaudda+, 2020)J/A+A/635/A43 : Stellar rot. periods from K2 C0-18 (Reinhold+, 2020)J/A+A/639/A77 : Proxima Cen RV, FWHM and fluxes (Suarez Mascareno+, 2020)J/A+A/653/A41 : L 98-59 (TOI-175) ESPRESSO observations (Demangeon+, 2021)J/AJ/164/251 : ZTF measured rotational period of M- or G-dwarfs (Lu+, 2022)J/A+A/661/A29 : First eROSITA study of nearby M dwarfs (Magaudda+, 2022)J/A+A/675/A168 : Stellar properties of 177 M dwarfs (Mignon+, 2023)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/167/196https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/167/196http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/167/196https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/167/196https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/167/196http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/167/196GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/167/196/table1 (32 M dwarfs in the ATLAS sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/167/196/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/167/196/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/167/196/table1?GETtext/xml+votable180.050000true1.68-7.5380560.005555555555555556Cone search capability for table J/AJ/167/196/table2 (Results of methodology tests on white dwarfs and rotating M dwarfs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/167/196/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/167/196/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/167/196/table2?GETtext/xml+votable180.050000true25.7540975-67.30843140.0055555555555555566/22 250 546 14765 14781 14918 14941 15061 16758 16847 17348 18496 18666 18726 22309 22645 24795 26538 30771 31216 33015 33384 34301 34448 34561 36614 37041 37453 38456 38464 38744 38853 39585 40250 40513 41324 41591 42314 42459 42760 44696 44921 45076 45372 45964 48500https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/167/196?format=asciiOpticalInfrareddefaultJ/AJ/167/196/table132 M dwarfs in the ATLAS sampleVmag[9.8/18.8] Apparent V band (Vega) magnitudemagphot.mag;em.opt.VfloatRmag[8.68/16.52] Apparent R band (Vega) magnitudemagphot.mag;em.opt.RfloatImag[7.14/14.1] Apparent I band (Vega) magnitudemagphot.mag;em.opt.IfloatFiltMonitoring filter for RECONS 0.9mmeta.notecharCov[7/23.3] Time Coverage for RECONS 0.9myrtime.intervalfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName used in this workmeta.idcharSimbadValid Simbad namemeta.id;meta.maincharRAJ2000Hour of Right Ascension, Gaia DR3 (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination, Gaia DR3 (J2000)pos.eq.dec;meta.mainsigma[5.4/36] Standard deviation, RECONS 0.9m, {sigma} for comparison to other effortsmmagstat.stdevfloatIDR[13/94] Interdecile range, RECONS 0.9mmmagsrc.var.amplitudefloatTIC[16909043/471012766] TESS Input Catalog identifiermeta.idlongsig-avg1[0.1/9.7]? PDCSAP {sigma} averagemmagstat.stdevfloatnullableIDR-avg1[0.3/21.7]? PDCSAP IDR averagemmagsrc.var.amplitudefloatnullablesig-avg2[0.5/9.8]? Unpopular pipeline {sigma} averagemmagstat.stdevfloatnullableIDR-avg2[1/26.1]? Unpopular pipeline IDR averagemmagsrc.var.amplitudefloatnullableSecNumber of Sectors, N.O.=Not Observedmeta.numbercharBlendTESS Blending-based contamination note (s)meta.notecharFileNameName of the ASCII file in subdirectory "lcs"; column added by CDSmeta.id;meta.filecharLCDisplay the interactive LC plotmeta.ref.urlcharJ/AJ/167/196/table2Results of methodology tests on white dwarfs and rotating M dwarfsSubset[1/3] Test subset (1)meta.noteintTIC[4400550/447382925] TESS Input Catalog IDmeta.id;meta.mainlongTmag[9.7/13.4] TESS Magnitude (2)magphot.mag;em.optfloatSector[1/14] Sectorobs.fieldintFSAP-IDR[2.6/18.5] Interdecile range, SAP Fluxmmagsrc.var.amplitudefloatFP-IDR[0.8/18.1] Interdecile range, PDCSAP Fluxmmagsrc.var.amplitudefloatPolyu-IDR[1.7/91.3] Interdecile range, unpopular w/ polynomialmmagsrc.var.amplitudefloatPoly-IDR[1/11.7] Interdecile range, unpopular w/o polynomialmmagsrc.var.amplitudefloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSimbadSimbad column added by the CDSmeta.ref.urlcharNameName used in this workmeta.idcharProt[3.3/91.7]? Literature Rotation perioddtime.periodfloatnullable_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main