Magnetic activity of G-type stars from LAMOST & TESS J/ApJS/271/60 ivo://CDS.VizieR/J/ApJS/271/60 doi:10.26093/cds/vizier.22710060 CDS Su T. Zhang L.-Y. Long L. Misra P. Han X.L. Meng G. Yang Z. Pi Q. 2024-11-06T20:31:26Z 2024-08-14T09:17:41Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr g-stars line-intensities visible-astronomy spectroscopy stellar-spectral-types radial-velocity metallicity infrared-photometry broad-band-photometry proper-motions stellar-distance The Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) data release 10 (DR10) provides over 3 million G-type stellar spectra, which are important for the study of chromospheric activity of solar-like stars. We have used the iSpec program to perform spectral subtraction on the G-type stellar spectra obtained from LAMOST DR10 with a signal-to-noise ratio greater than 10. We have calculated the magnetic activity of G-type stars using H{alpha} lines and analyzed the H{alpha} variation. Among the more than 3 million spectra from more than 2.3 million stars, a total of 220,000 stars show excess chromospheric activity. There were a total of about 480,000 stars with repeated observations. About 390,000 stars were found to exhibit variations in the H{alpha} line, and 14,000 stars showed changes in their radial velocity. By using the Gaia data, we determined the distances of these stars above the Galactic disk. We first concluded that the fraction of G-type active stars decreases with increasing distance above the Galactic disk. By using the Transiting Exoplanet Survey Satellite light curves, we obtained the effective fluctuation range of the light curve caused by the starspot and confirmed that there was a positive correlation between the starspot and chromospheric activity. We also concluded that R'_H{alpha}_ tends to be stable for Rossby number (Ro)<0.13 and that R'_H{alpha}_ decreases as Ro increases in the region Ro>=0.13. 2024ApJS..271...60S https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/271/60 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to B/vsx : AAVSO International Variable Star Index VSX (Watson+, 2006-) III/198 : Palomar/MSU nearby star spectroscopic survey (Hawley+ 1997) III/218 : ELODIE archive (Prugniel+, 2001) I/347 : Distances to 1.33 billion stars in Gaia DR2 (Bailer-Jones+, 2018) V/156 : LAMOST DR7 catalogs (Luo+, 2019) IV/39 : TESS Input Catalog version 8.2 (TIC v8.2) (Paegert+, 2021) I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022) J/ApJ/315/687 : X-Ray emission from solar-type stars: F and G (Maggio+, 1987) J/ApJS/85/315 : F, G and K dwarf stars of the Pleiades (Soderblom+ 1993) J/A+A/331/581 : Rotation and activity in field M dwarfs (Delfosse+ 1998) J/PASP/110/863 : A Stellar Spectral Flux Library: 1150 - 25000 A (Pickles 1998) J/A+A/397/147 : Activity-rotation relationship in stars (Pizzolato+ 2003) J/ApJS/152/251 : Indo-US library of coude feed stellar spectra (Valdes+, 2004) J/AJ/128/426 : Subdwarfs in the SDSS (West+, 2004) J/MNRAS/371/703 : MILES library of empirical spectra (Sanchez-Blazquez+, 2006) J/AJ/135/785 : SDSS-DR5 low-mass star spectroscopic sample (West+, 2008) J/MNRAS/389/585 : Fundamental parameters of M dwarfs (Casagrande+, 2008) J/ApJ/743/48 : Stars with rot. periods and X-ray luminosities (Wright+, 2011) J/AJ/143/93 : Rotational velocities in early-M stars (Reiners+, 2012) J/ApJ/757/112 : Stellar diameters. II. K and M-stars (Boyajian+, 2012) J/ApJ/783/130 : Parallaxes of high mass star forming regions (Reid+, 2014) J/ApJ/795/161 : Activity & rotation in Praesepe & the Hyades (Douglas+, 2014) J/A+A/594/A39 : LAMOST-Kepler param. and activity indicators (Frasca+, 2016) J/ApJ/834/85 : H{alpha} emission in nearby M dwarfs (Newton+, 2017) J/ApJ/834/207 : Periodicity & mag. of Kepler LCs variation (Mehrabi+, 2017) J/MNRAS/476/908 : Chromospheric activity in 4 open clusters (Fang+, 2018) J/other/RAA/19.64 : LAMOST sp. binaries & variable stars (Qian+, 2019) J/ApJS/247/9 : FGK stars magnetic activity in LAMOST-Kepler (Zhang+, 2020) J/ApJS/253/19 : Halpha and other EWs of LAMOST M-type stars (Zhang+, 2021) J/ApJS/260/45 : Stellar param. of M-type stars from LAMOST DR8 (Ding+, 2022) J/ApJS/261/26 : Exoplanet host stars from LAMOST, TESS, Kepler (Su+, 2022) J/MNRAS/514/4781 : Active stars in the LAMOST-K2 field (Xiang+, 2022) J/ApJS/268/4 : Stellar variability with TESS (Fetherolf+, 2023) https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/271/60 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/271/60 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/271/60 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/271/60 https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/271/60 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/271/60 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/ApJS/271/60/table1 (Low-resolution spectral parameters of G-type stars in LAMOST DR10) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/271/60/table1? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/271/60/table1? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/271/60/table1? GET text/xml+votable 180.0 50000 true 331.1392083 -1.59175 0.005555555555555556 Cone search capability for table J/ApJS/271/60/table2 (Low-resolution spectral parameters of G-type stars with multiple observations from LAMOST DR10) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/271/60/table2? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/271/60/table2? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/271/60/table2? GET text/xml+votable 180.0 50000 true 332.05625 -0.3451667 0.005555555555555556 Cone search capability for table J/ApJS/271/60/table3 (The locations of G-type stars of LAMOST DR10 low-resolution survey in our Galaxy) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/271/60/table3? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/271/60/table3? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/271/60/table3? GET text/xml+votable 180.0 50000 true 331.1392083 -1.59175 0.005555555555555556 1/23 2/1 3-6 8-10 18-20 22 24 26 33-36 40 58 79 85 91 105 109 124 3/0-2 9-11 28-29 48-50 65-68 71 84-86 92-94 101-103 108-110 112-113 128-130 148 150-151 153-154 157 164 166-168 171 173-174 209-210 212 215-216 221 277 283-284 286-287 294-295 297 299-301 303-306 309-311 345-348 350-351 357 361-363 406-407 413 415 425-426 428 430-432 435 442 445-447 474 485 487 489 495 502 504-505 510 4/13-15 33-35 120-122 124-126 176-177 179 181-183 185-188 210-212 217 224 256-258 276-277 279-280 282-283 348-349 351 400-402 444 456-458 464 480 482 524 527 597 599 610-611 620-621 623-625 633-634 660 662-663 676-678 680-681 689 691 700-701 705-710 712-714 716 736 772-773 785-788 790-792 795-796 798-799 802 812 814 821 825 830 833 835 844-846 853-857 859 868 872-873 876 878-881 889 900-901 904-905 907 911 916 920 922-924 926 944-946 954-955 958 992 1103 1107 1114-1115 1117-1119 1125-1128 1130-1131 1140 1142 1167 1173-1175 1186 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31137-31139 31152 31154-31155 31236-31237 31239 31245 31256-31257 31259 31281 31283 31289 31291 31361 31363 31416 31418-31419 31452-31453 31455 31520-31522 31584 31586-31587 31609-31611 31644-31645 31647 31660-31661 31663 32000 32002-32003 32044 32046-32047 32055 32058-32059 32088 32090-32091 32119-32120 32196-32198 32200-32202 32204 32206-32207 32219 32224 32226 32241 32243 32249-32251 32396 32416 32418-32419 32422-32423 32446-32447 32489-32491 32564 32566-32567 32581-32585 32587 32628-32629 32631 32708-32709 32711 36710-36711 36714-36715 36722-36723 36726 36732 36734-36735 36757 36759 36765 36767 36782-36783 36794 36832-36833 36836-36837 36839 36842-36843 40797 40859 40862-40863 40871 40877 40902-40903 40913-40915 44979 44982-44983 45017-45019 45026 48981-48983 48997-48999 49013-49014 49020 49022-49023 49092-49093 49095 49112-49113 49141 https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/271/60?format=ascii Optical Infrared default J/ApJS/271/60/table1 Low-resolution spectral parameters of G-type stars in LAMOST DR10 S/Nu [0/446]? Signal-to-Noise of u band observation stat.snr;em.opt.U double nullable S/Nr [10/999] Signal-to-Noise of r band observation stat.snr;em.opt.R float S/Ni [0/999]? Signal-to-Noise of i band observation stat.snr;em.opt.I double nullable S/Nz [0/999]? Signal-to-Noise of z band observation stat.snr;em.opt.I double nullable SpT Spectral type src.spType char Teff [3870/7063] Effective temperature from LAMOST K phys.temperature.effective float e_Teff [0/998]? Uncertainty in Teff K stat.error;phys.temperature.effective double nullable Act [NY] Judgment of stellar activity (Y=activity; or N=inactivity) meta.code char DR7 Display data from LAMOST LRS DR7 (V/156) within 0.5" meta.ref.url char _RA Positions from LAMOST names (right ascension part) deg pos.eq.ra;meta.main indexed _DE Positions from LAMOST names (declination part) deg pos.eq.dec;meta.main indexed S/Ng [1.7/999]? Signal-to-Noise of g band observation stat.snr;em.opt.B double nullable recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int LAMOST LAMOST DR10 identifier (JHHMMSS.ss+DDMMSS.s) meta.id;meta.main char primary indexed HJD Heliocentric modified Julian Date (HJD-2400000.5) d time.epoch double indexed Exp [0/9600] Exposure time s time.duration;obs.exposure float gmag [1/28.3]? Apparent g band AB magnitude mag phot.mag;em.opt.B float nullable rmag [-0.5/22.4]? Apparent r band AB magnitude mag phot.mag;em.opt.R float nullable imag [-1.5/28.6]? Apparent i band AB magnitude mag phot.mag;em.opt.I float nullable zmag [1/28]? Apparent z band AB magnitude mag phot.mag;em.opt.I float nullable ymag [-3.6/26.4]? Apparent y band AB magnitude mag phot.mag;em.IR.J float nullable logg [0.06/5] Log surface gravity from LAMOST log(cm.s**-2) phys.gravity float e_logg [0/1.2]? Uncertainty in logg log(cm.s**-2) stat.error;phys.gravity double nullable [Fe/H] [-2.5/0.8] Metallicity from LAMOST log(Sun) phys.abund.Z float e_[Fe/H] [0/1]? Uncertainty in [Fe/H] log(Sun) stat.error;phys.abund.Fe double nullable RVel [-424/433] Radial velocity from LAMOST km/s phys.veloc;pos.heliocentric float e_RVel [0/100]? Uncertainty in RVel km/s stat.error;spect.dopplerVeloc double nullable EWcHa [-181/30] Continuum corrected H{alpha} equivalent width (EW'_H{alpha}_) in Angstrom units 0.1nm spect.line.eqWidth;spect.continuum;em.line.Halpha double e_EWcHa [0.001/73] Uncertainty in EWcHa 0.1nm stat.error;spect.line.eqWidth;spect.continuum float
J/ApJS/271/60/table2 Low-resolution spectral parameters of G-type stars with multiple observations from LAMOST DR10 LAMOST LAMOST DR10 identifier (JHHMMSS.ss+DDMMSS.s) meta.id;meta.main char primary indexed (max-min)Ha [0/181] Difference between maximum and minimum EW' values 0.1nm spect.line.eqWidth;arith.diff;em.line.Halpha float (max/min)Ha [-1429/2346]? Ratio of EWc maximum to minimum 0.1nm spect.line.eqWidth;arith.ratio;em.line.Halpha double nullable VHa [NY] The H{alpha} EWc variability judgment (1) meta.code;src.var;em.line.Halpha char RVel [-303/358] LAMOST radial velocity km/s phys.veloc;pos.heliocentric float recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int m_LAMOST Number of observations for this LAMOST source meta.number int nullable HJD Heliocentric modified Julian Date (HJD-2400000.5) d time.epoch double indexed EWcHa [-181/16] Continuum corrected H{alpha} equivalent width (EW'_H{alpha}_) in Angstrom units 0.1nm spect.line.eqWidth;spect.continuum;em.line.Halpha double e_EWcHa [0.001/73] Uncertainty in EWcHa 0.1nm stat.error;spect.line.eqWidth;spect.continuum float e_RVel [0/99]? Uncertainty in RVel km/s stat.error;spect.dopplerVeloc double nullable (max-min)RV [0/221] Difference between maximum and minimum RVel values km/s spect.dopplerVeloc;arith.diff float (max/min)RV [-1801/1646]? Ratio of RVel maximum to minimum km/s spect.dopplerVeloc;arith.ratio double nullable Vrv [NY] The radial velocity variability judgment (1) meta.code;src.var char DR7 Display data from LAMOST LRS DR7 (V/156) within 0.5" meta.ref.url char _RA Positions from LAMOST names (right ascension part) deg pos.eq.ra;meta.main indexed _DE Positions from LAMOST names (declination part) deg pos.eq.dec;meta.main indexed
J/ApJS/271/60/table3 The locations of G-type stars of LAMOST DR10 low-resolution survey in our Galaxy LAMOST LAMOST DR10 identifier (JHHMMSS.ss+DDMMSS.s) meta.id;meta.main char primary indexed recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int pmRA [-242/358] Gaia DR3 proper motion along RA mas/yr pos.pm;pos.eq.ra float pmDE [-447/232] Gaia DR3 proper motion along DE mas/yr pos.pm;pos.eq.dec float Dist [40/32702]? Gaia DR3 distance pc pos.distance float nullable RVel [-424/423] LAMOST radial velocity km/s phys.veloc;pos.heliocentric float Z [-22430/31806]? Distance from the Galactic disk pc pos.distance double nullable R [207/22760]? Horizontal distance from Galactic center pc pos.distance;pos.galactocentric float nullable DR7 Display data from LAMOST LRS DR7 (V/156) within 0.5" meta.ref.url char Gaia Display data from Gaia DR3 (I/355) within 3" meta.ref.url char _RA Positions from LAMOST names (right ascension part) deg pos.eq.ra;meta.main indexed _DE Positions from LAMOST names (declination part) deg pos.eq.dec;meta.main indexed