Stellar chromospheric activity of LAMOST sources J/A+A/688/A23 ivo://CDS.VizieR/J/A+A/688/A23 doi:10.26093/cds/vizier.36880023 CDS Zhang W. Zhang J. He H. Luo A. Zhang H. 2024-11-29T20:04:56Z 2024-07-31T08:20:05Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr g-stars spectroscopy stellar-activity visible-astronomy The dependence of stellar magnetic activity on stellar parameters is inspired by the chromospheric activity studies based on the large-scale spectroscopic surveys. The main objective of this project is to provide the chromospheric activity parameter database for the LAMOST Low-Resolution Spectroscopic Survey (LRS) spectra of solar-like stars and explore the overall property of stellar chromospheric activity. The CaII H and K lines were employed to construct indicators for assessing and studying the chromospheric activity of solar-like stars. We investigated the widely used bolometric- and photospheric-calibrated chromospheric activity index R'_HK_, derived from the method in the classic literature (R'_HK,classic_) and the method based on the PHOENIX model (R'_HK,PHOENIX_). Since the detailed stellar atmospheric parameters, effective temperature (T_eff_), surface gravity (logg), and metallicity ([Fe/H]) are available for LAMOST, we estimated the chromospheric activity index R'_HK,PHOENIX_, along with the corresponding bolometric calibrated index R_HK,PHOENIX_, taking these parameters into account. We provided the database of the derived chromospheric activity parameters for 1,122,495 LAMOST LRS spectra of solar-like stars. Our calculations show that logR'_HK,PHOENIX_ is approximately linearly correlated with logR'_HK,classic_. The results based on our extensive archive support the view that the dynamo mechanism of solar-like stars is generally consistent with the Sun; and the value of the solar chromospheric activity index is located at the midpoint of the solar-like star sample. We further investigated the proportions of solar-like stars with different chromospheric activity levels (very active, active, inactive, and very inactive). The investigation indicates that the occurrence rate of high levels of chromospheric activity is lower among the stars with effective temperatures between 5600 and 5900K. 2024A&A...688A..23Z https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/688/A23 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to https://doi.org/10.5281/zenodo.8378849 : Paper data https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/688/A23 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/688/A23 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/688/A23 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/688/A23 https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/688/A23 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/688/A23 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/A+A/688/A23/table3 (Catalogue data) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/688/A23/table3? https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/688/A23/table3? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/688/A23/table3? 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Should Not be used for identification. meta.record int sp Display the DR9 LAMOST spectrum, if available meta.ref.url char ObsId Unique observation identifier of LAMOST LRS spectrum meta.id;obs.param;obs long ObsDate Spectral observation date time.epoch;obs nullable indexed fitsname FITS file name of LAMOST LRS spectrum meta.id;meta.file char snrg Signal-to-noise ratio in the g band (S/N_g_) of LAMOST LRS spectrum stat.snr float snrr Signal-to-noise ratio in the r band (S/N_r_) of LAMOST LRS spectrum stat.snr float Teff Effective temperature (T_eff_) derived from the LASP K phys.temperature.effective float e_Teff ? Uncertainty of Teff derived from the LASP K stat.error;phys.temperature.effective double nullable logg Surface gravity (logg) derived from the LASP log(cm.s**-2) phys.gravity float e_logg ? Uncertainty of logg derived from the LASP log(cm.s**-2) stat.error double nullable [Fe/H] Metallicity ([Fe/H]) derived from the LASP phys.abund.Z float e_[Fe/H] ? Uncertainty of [Fe/H] derived from the LASP stat.error;phys.abund.Fe double nullable RV Radial velocity (V_r_) derived from the LASP km/s phys.veloc;pos.heliocentric float e_RV ? Uncertainty of RV derived from the LASP km/s stat.error double nullable RAJ2000 Right ascension (RA) of fiber pointing (J2000) deg pos.eq.ra;meta.main indexed DEJ2000 Declination (DEC) of fiber pointing (J2000) deg pos.eq.dec;meta.main indexed GaiaDR3 Source identifier in Gaia DR3 catalog meta.id;meta.main Gmag G magnitude in Gaia DR3 catalog ag phot.mag;em.opt double Stri S_tri_ index of LAMOST LRS spect.index double e_Stri ? Uncertainty of Stri stat.error double nullable SMWO S_MWO_ activity index spect.index double e_SMWO ? Uncertainty of SMWO stat.error double nullable logRHKcl logR_HK_ activity index derived from the method in the classic literature spect.index double e_logRHKcl ? Uncertainty of logRHKcl stat.error double nullable logRHKPh logR_HK_ activity index derived from the method based on the PHOENIX model spect.index double e_logRHKPh ? Uncertainty of logRHKPh stat.error double nullable logRpHKcl logR'_HK_ activity index derived from the method in the classic literature spect.index double e_logRpHKcl ? Uncertainty of logRpHKcl stat.error double nullable logRpHKPh logR'_HK_ activity index derived from the method based on the PHOENIX model spect.index double e_logRpHKPh ? Uncertainty of logRpHKPh stat.error double nullable