Dataset of hydrogen Balmer line indexes for stellar chromospheric activity of solar-like stars based on the LAMOST spectroscopic surveys

This dataset consists of three catalogs of the data of the hydrogen Balmer line indexes of solar-like stars for stellar chromospheric activity based on the LAMOST Low-Resolution Spectroscopic Survey (LRS) and Medium-Resolution Spectroscopic Survey (MRS): (1) LRS spectral catalog, (2) MRS spectral catalog, and (3) stellar source catalog. These catalogs are stored as three CSV-format data files. The columns contained in the catalogs are described below. The observational and spectroscopic parameters of the spectral samples in the dataset are from LAMOST DR9 v2.0. Unavailable values in the dataset are marked as −9999.0.

(1) LRS spectral catalog (Balmer_line_indexes_LRS_spectral_catalog_LAMOST_DR9.csv)

obsid - unique LAMOST observation identifier of LRS

obsdate - date of LRS observation (UTC)

uid - unique LAMOST source identifier

ra - right ascension of stellar source in LRS catalog (unit: degree)

dec - declination of stellar source in LRS catalog (unit: degree)

sn_g - LRS g-band signal-to-noise ratio

sn_r - LRS r-band signal-to-noise ratio

teff - stellar effective temperature determined from LRS data (unit: K)

teff_err - uncertainty of teff (unit: K)

logg - stellar surface gravity determined from LRS data (unit: dex)

logg_err - uncertainty of logg (unit: dex)

feh - stellar metallicity determined from LRS data (unit: dex)

feh_err - uncertainty of feh (unit: dex)

rv - radial velocity determined from LRS data (unit: km/s)

rv_err - uncertainty of rv (unit: km/s)

L_halpha - Hα activity index of LRS data

L_halpha_err - uncertainty of L_halpha

L_hbeta - Hβ activity index of LRS data

L_hbeta_err - uncertainty of L_hbeta

L_hgamma - Hγ activity index of LRS data

L_hgamma_err - uncertainty of L_hgamma

L_hdelta - Hδ activity index of LRS data

L_hdelta_err - uncertainty of L_hdelta

(2) MRS spectral catalog (Balmer_line_indexes_MRS_spectral_catalog_LAMOST_DR9.csv)

obsid - unique LAMOST observation identifier of MRS

obsdate - date of MRS observation (UTC)

uid - unique LAMOST source identifier

ra - right ascension of stellar source in MRS catalog (unit: degree)

dec - declination of stellar source in MRS catalog (unit: degree)

sn_B - MRS blue-band signal-to-noise ratio

sn_R - MRS red-band signal-to-noise ratio

teff - stellar effective temperature determined from MRS data (unit: K)

teff_err - uncertainty of teff (unit: K)

logg - stellar surface gravity determined from MRS data (unit: dex)

logg_err - uncertainty of logg (unit: dex)

feh - stellar metallicity determined from MRS data (unit: dex)

feh_err - uncertainty of feh (unit: dex)

rv_r0 - radial velocity determined from the red band data of MRS (unit: km/s)

rv_r0_err - uncertainty of rv_r0 (unit: km/s)

M_halpha – Hα activity index of MRS data

M_halpha_err - uncertainty of M_halpha

(3) stellar source catalog (Balmer_line_indexes_stellar_source_catalog_LAMOST_DR9.csv)

uid - unique LAMOST source identifier

ra - right ascension of stellar source from LRS catalog (unit: degree)

dec - declination of stellar source from LRS catalog (unit: degree)

teff - stellar effective temperature from LRS catalog (unit: K)

teff_err - uncertainty of teff (unit: K)

logg - stellar surface gravity from LRS catalog (unit: dex)

logg_err - uncertainty of logg (unit: dex)

feh - stellar metallicity from LRS catalog (unit: dex)

feh_err - uncertainty of feh (unit: dex)

L_halpha - Hα activity index of LRS data

L_halpha_err - uncertainty of L_halpha

L_hbeta - Hβ activity index of LRS data

L_hbeta_err - uncertainty of L_hbeta

L_hgamma - Hγ activity index of LRS data

L_hgamma_err - uncertainty of L_hgamma

L_hdelta - Hδ activity index of LRS data

L_hdelta_err - uncertainty of L_hdelta

M_halpha - Hα activity index of MRS data

M_halpha_err - uncertainty of M_halpha

l_halpha - Hα absolute flux index of LRS data (unit: 1/Å)

l_halpha_err - uncertainty of l_halpha (unit: 1/Å)

l_hbeta - Hβ absolute flux index of LRS data (unit: 1/Å)

l_hbeta_err - uncertainty of l_hbeta (unit: 1/Å)

l_hgamma - Hγ absolute flux index of LRS data (unit: 1/Å)

l_hgamma_err - uncertainty of l_hgamma (unit: 1/Å)

l_hdelta - Hδ absolute flux index of LRS data (unit: 1/Å)

l_hdelta_err - uncertainty of l_hdelta (unit: 1/Å)

m_halpha - Hα absolute flux index of MRS data (unit: 1/Å)

m_halpha_err - uncertainty of m_halpha (unit: 1/Å)