Stellar chromospheric activity spectral database of solar-type stars based on the LAMOST Low-Resolution Spectroscopic Survey(disused)

A stellar chromospheric activity spectral database of solar-type stars is constructed based on the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Low-Resolution Spectroscopic Survey (LRS). The database contains 1,330,654 high-quality LRS spectra of solar-type stars with effective temperature ranging from 4800 K to 6800 K. We measure the mean fluxes at line cores of the Ca II H&K lines using a 1 Å rectangular bandpass as well as a 1.09 Å full width at half maximum (FWHM) triangular bandpass, and the mean fluxes of two 20 Å pseudo-continuum bands on the two sides of the lines. Three chromospheric activity indexes, Srec based on the 1 Å rectangular bandpass, and Stri and SMWL based on the 1.09 Å FWHM triangular bandpass, are evaluated from the measured fluxes. The uncertainties of all the obtained parameters are estimated. We also produce spectrum diagrams of Ca II H&K lines for all the spectra in the database. This database with more than one million high-quality LAMOST LRS spectra and basal chromospheric activity parameters can be further used for investigating activity characteristics of solar-type stars and solar-stellar connection.

The entity of the database is composed of (1) a catalog of spectral sample and activity parameters, and (2) a library of spectrum diagrams.

(1) Catalog of Spectral Sample and Activity Parameters
CaIIHK_Sindex_LAMOST_DR7_LRS.csv

(2) Library of Spectrum Diagrams
spectrum_diagrams_000-049.zip  (46 subfolders)
spectrum_diagrams_050-099.zip  (40 subfolders)
spectrum_diagrams_100-149.zip  (47 subfolders)
spectrum_diagrams_150-199.zip  (49 subfolders)
spectrum_diagrams_200-249.zip  (47 subfolders)
spectrum_diagrams_250-299.zip  (45 subfolders)
spectrum_diagrams_300-349.zip  (41 subfolders)
spectrum_diagrams_350-399.zip  (39 subfolders)
spectrum_diagrams_400-449.zip  (45 subfolders)
spectrum_diagrams_450-499.zip  (35 subfolders)
spectrum_diagrams_500-549.zip  (27 subfolders)
spectrum_diagrams_550-599.zip  (38 subfolders)
spectrum_diagrams_600-649.zip  (32 subfolders)
spectrum_diagrams_650-699.zip  (26 subfolders)
spectrum_diagrams_700-749.zip  (28 subfolders)