Dataset of variability of Hα chromospheric activity of solar-like stars based on the time-domain data of LAMOST Medium-Resolution Spectroscopic Survey

This dataset includes a catalog of the measures of Hα chromospheric activity intensity and Hα variability of solar-like stars based on the time-domain data of Medium-Resolution Spectroscopic Survey (MRS) of LAMOST DR10 v1.0. The catalog is stored in CSV format. The file name of the catalog is Halpha_variability_catalog_LAMOST_MRS_DR10.csv. Columns contained in the catalog: uid – unique LAMOST source identifier ra – right ascension of each stellar source (unit: degree) dec – declination of each stellar source (unit: degree) teff – effective temperature of each stellar source (unit: K) teff_err – uncertainty of teff logg – surface gravity of each stellar source (unit: dex) logg_err – uncertainty of logg feh – metallicity of each stellar source (unit: dex) feh_err – uncertainty of feh N_obs – number of MRS observations of each stellar source T_span – time span of multiple observations of each stellar source (unit: day) obsid_list – list of obsid (unique LAMOST observation identifier) for multiple observations of each stellar source obstime_list – list of observation time (UTC) for multiple observations of each stellar source mjd_list – list of Modified Julian Day (MJD) for multiple observations of each stellar source (unit: day) I_halpha_list – list of Hα activity index (I_halpha) for multiple observations of each stellar source I_halpha_err_list – list of uncertainty of I_halpha for multiple observations of each stellar source median_I_halpha – median I_halpha for multiple observations of each stellar source Median_I_halpha_err – uncertainty of median_I_halpha R_halpha_list – list of Hα R-index (R_halpha) for multiple observations of each stellar source R_halpha_err_list – list of uncertainty of R_halpha for multiple observations of each stellar source median_R_halpha – median R_halpha for multiple observations of each stellar source median_R_halpha_err – uncertainty of median_R_halpha EXT_R_halpha – extent of R_halpha fluctuation for multiple observations of each stellar source EXT_R_halpha_err – uncertainty of EXT_R_halpha EXT_R_halpha_gt_3err – indicating if the value of EXT_R_halpha is greater than three times EXT_R_halpha_err; `Y' representing yes and `N' representing no STD_R_halpha – STD (standard deviation) of R_halpha fluctuation for multiple observations of each stellar source Note: (1) The observational and spectroscopic parameters are from the MRS catalogs and FITS files of LAMOST DR10 v1.0; the parameter values of each stellar source are the medians of multiple observations. (2) The data in a list of parameter values for multiple observations of each stellar source are sorted by observation time.