Stellar chromospheric activity database of solar-like stars based on the Ca II H and K lines of LAMOST Low-Resolution Spectroscopic Survey: the bolometric and photospheric calibration

This database contains the stellar chromospheric activity parameters of solar-like stars based on the Ca II H and K lines from the spectra of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Low-Resolution Spectroscopic Survey (LRS). We extract 1,283,197 LRS spectra of solar-like stars from the LAMOST Data Release 8 v2.0 and provide the chromospheric activity parameters $S_{\rm tri}$, $S_{\rm MWO}$, $R_{\rm HK}$ and $R'_{\rm HK}$, as well as their uncertainties in the database. $R_{\rm HK}$ and $R'_{\rm HK}$ are derived from the method in the classic literature (denoted with classic) and the method based on the PHOENIX model (denoted with PHOENIX). These stellar chromospheric activity indexes and their uncertainties, along with the relevant spectroscopic parameters from the LAMOST catalogs, are saved in a CSV-format file (name: CaIIHK_Activity_Indexes_LAMOST_DR8_LRS.csv).

Columns in the catalog of the database:
obsid - Unique observation identifier of LAMOST LRS spectrum
fitsname - FITS file name of LAMOST LRS spectrum
snrg - Signal-to-noise ratio in the $g$ band ($\mathrm{S/N}_g$) of LAMOST LRS spectrum
snrr - Signal-to-noise ratio in the $r$ band ($\mathrm{S/N}_r$) of LAMOST LRS spectrum
teff - Effective temperature ($T_\mathrm{eff}$) derived from the LASP (unit: K)
teff_err - Uncertainty of $T_\mathrm{eff}$ derived from the LASP (unit: K)
logg - Surface gravity ($\log\,g$) derived from the LASP (unit: dex)
logg_err - Uncertainty of $\log\,g$ derived from the LASP (unit: dex)
feh - Metallicity ([Fe/H]) derived from the LASP (unit: dex)
feh_err - Uncertainty of [Fe/H] derived from the LASP (unit: dex)
rv - Radial velocity ($V_r$) derived from the LASP (unit: km/s)
rv_err - Uncertainty of $V_r$ derived from the LASP (unit: km/s)
ra_obs - Right ascension (RA) of fiber pointing (unit: degree)
dec_obs - Declination (DEC) of fiber pointing (unit: degree)  
gaia_source_id - Source identifier in Gaia DR3 catalog
gaia_g_mean_mag - $G$ magnitude in Gaia DR3 catalog
S_tri* - $S_{\rm tri}$ index  of LAMOST LRS  
S_tri_err* - Uncertainty of $S_{\rm tri}$  
S_MWO* - $S_{\rm MWO}$  
S_MWO_err* - Uncertainty of $S_{\rm MWO}$  
log_R_HK_classic* - $\log\,R_{\rm HK,classic}$  
log_R_HK_classic_err* - Uncertainty of $\log\,R_{\rm HK,classic}$  
log_R_p_HK_classic* - $\log\,R'_{\rm HK,classic}$  
log_R_p_HK_classic_err* - Uncertainty of $\log\,R'_{\rm HK,classic}$  
log_R_HK_PHOENIX* - $\log\,R_{\rm HK,PHOENIX}$  
log_R_HK_PHOENIX_err* - Uncertainty of $\log\,R_{\rm HK,PHOENIX}$  
log_R_p_HK_PHOENIX* - $\log\,R'_{\rm HK,PHOENIX}$  
log_R_p_HK_PHOENIX_err* - Uncertainty of $\log\,R'_{\rm HK,PHOENIX}$  
(Note: The columns denoted by an asterisk represent the parameters provided by this database, and the remaining columns are collected from the data release of LAMOST DR8 V2.0. If the values are not available, they will be filled with '-9999' in this database.)