J/A+A/600/A13ivo://CDS.VizieR/J/A+A/600/A13doi:10.26093/cds/vizier.36000013CDSAstudillo-Defru N.Delfosse X.Bonfils X.Forveille T.Lovis C.,Rameau J.2019-02-01T08:08:20Z2017-03-20T07:05:15ZCDS support team

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

cds-question@unistra.frm-starsdwarf-starsstellar-massesspectroscopyAtmospheric magnetic fields in stars with convective envelopes heat stellar chromospheres, and thus increase the observed flux in the CaII H and K doublet. Starting with the historical Mount Wilson monitoring program, these two spectral lines have been widely used to trace stellar magnetic activity, and as a proxy for rotation period (Prot) and consequently for stellar age. Monitoring stellar activity has also become essential in filtering out false-positives due to magnetic activity in extra-solar planet surveys. The CaII emission is traditionally quantified through the R'_HK_-index, which compares the chromospheric flux in the doublet to the overall bolometric flux of the star. Much work has been done to characterize this index for FGK-dwarfs, but M dwarfs - the most numerous stars of the Galaxy - were left out of these analyses and no calibration of their CaII H and K emission to an R'_HK_ exists to date. We set out to characterize the magnetic activity of the low- and very-low-mass stars by providing a calibration of the R'_HK_-index that extends to the realm of M dwarfs, and by evaluating the relationship between R'_HK_ and the rotation period.. We calibrated the bolometric and photospheric factors for M dwarfs to properly transform the S-index (which compares the flux in the CaII H and K lines to a close spectral continuum) into the R'_HK_. We monitored magnetic activity through the CaII H and K emission lines in the HARPS M dwarf sample.2017A&A...600A..13Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/600/A13CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)J/AJ/142/138 : All-sky catalog of bright M dwarfs (Lepine+, 2011)J/ApJ/752/56 : BDKP III. Parallaxes for 70 ultracool dwarfs (Faherty+ 2012)J/MNRAS/443/2561 : CONCH-SHELL catalog of nearby M dwarfs (Gaidos+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/600/A13https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/600/A13http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/600/A13https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/600/A13https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/600/A13http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/600/A13GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/600/A13/tablea3 (Parameters, activity and rotation periods for the HARPS M dwarf sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/600/A13/tablea3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/600/A13/tablea3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/600/A13/tablea3?GETtext/xml+votable180.050000true217.4289381-62.67949190.0055555555555555566/22 30 115 131 186 297 309 546 4099 4103 4144 4157 4250 4297 4366 4444 4651 4672 8208 8240 8343 8355 8394 8440 8705 8733 8739 12312 12359 12865 16391 16462 16543 16581 16635 16758 16825 16910 17020 17058 17124 17158 17255 17271 17358 17455 17486 17838 17870 18195 18220 18440 18496 18569 18666 18758 18789 18856 18913 19014 19064 19163 19187 19243 19265 19306 19352 19361 19466 19516 19601 19668 19776 20023 20100 20515 20597 20867 20896 21151 21171 21392 21527 21747 21777 21953 22014 22040 22148 22222 22273 22289 22309 22575 22626 22636 22645 22700 22787 22807 22813 22873 22904 22959 22964 22968 23010 23014 23047 23238 23363 23564 23718-23719 23735 23741 23743 24227 24713 24995 25009 25091 25125 25154 25255 25363 25388 25398 25546 25639 25865 25989 26401 26487 26495 26538 26555 26560 26563 26583 26588 26757 26772 26821 26967 26972 27166 27201 27289-27290 27392 27459 27484 27592 27730 27734 27799 27810 27849 27912 28548 28955 29146 29158 29170 29275 29374 29458 29524 29665 29684 29855 30040 30078 30132 30189 30321 30387 30407 30429 30505 30522 30624-30626 30735 30771 30833 30893 30956 30978 31001 31010 31013-31014 31019 31031 31035 31191 31229 31339 31495 31630 31686 31781 31787 31884 31986 32015 32033 32076 32259 32335 32854 33049 33403 33545 33693 33702 33713 33758 33930 33966 34067 34181 34301 34437 34448 34514 34767 34816 34835 34924 34955 34975 35057 35150 35238 35288 35324-35325 35335 35360 35366 35375 35388 35499 35520 35625 35670 35679 35759 35818 35830 35856 35950 35969 36078 36125 36160 36496 36555 36583 36658 36679 36710 36732 36752 36763 36910 36971 37023 37379 37803 37872 37942 38152 38247 38456 38551 38675 38744 38818 38820 38913 38957 39027 39080 39242 39585 39807 39912 40250 40341 40359 40386 40436 40505 40513 40610 40679 40811 41042 41252 41455 41591 41660 42054 42101 42209 42216 42231 42255 42290 42314 42485 42535 42544 42652 42659 42784 42982 43187 43569 43580 43723 43970 44284 44541 44585 44728 44866 44921 44936-44937 45006 45113 45118 45269 45317 45419 45428 45434 45474 45497 45506 45543 45771 45954 45964 46116 46128 46218 46275 46289 46387 46448 46566 46598-46599 46619 46632 46713 46718 46752 46868 47121 47158 47183 47201 47337 47953 48274 48303 48485 48500 48516 48731 48902 48906 48926 48935 48958 49015 49048 49101 491253.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/600/A13?format=asciidefaultJ/A+A/600/A13/tablea3Parameters, activity and rotation periods for the HARPS M dwarf sampleSimbadNameSimbad column added by the CDSmeta.idcharSS-indexspect.indexfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameObject namemeta.id;meta.maincharVmagVisual magnitudemagphot.mag;em.opt.Vfloatr_Vmag[1/2] Reference for the photometry (1)meta.ref;pos.frameintB-VB-V color indexmagphot.color;em.opt.B;em.opt.VfloatV-KV-K color indexmagphot.color;em.opt.V;em.IR.KfloatplxParallaxmaspos.parallaxfloate_plxParallax uncertaintymasstat.error;pos.parallaxfloatr_plx[2/7] Reference for the parallax (1)meta.ref;pos.frameintMassStellar masssolMassphys.massfloatNspNumber of spectra used in the analysismeta.numberinte_SS-index uncertaintystat.errorfloatlog(R'HK)logarithm R'HK-indexphot.flux;arith.ratiofloate_log(R'HK)R'HK-index uncertaintystat.errorfloatProtStellar rotationdtime.periodintSNRAverage SNR in the violet and red bandsstat.snrfloat_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