Han He

activity

20242026

collaborators

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3 papers · 1 filter

astro-ph.SR2026

Stellar Chromospheric Activity Database of Solar-like Stars Based on the LAMOST Low-Resolution Spectroscopic Survey III. Calibrating the Chromospheric Basal Flux and the Connection to Stellar Rotation

Weitao Zhang, Han He, Jun Zhang

Based on the Ca\,II H and K lines observed by LAMOST, we employ the photospheric ( $R_{HK}^{'}$ ) and basal ( $R_{HK, L}^{+}$ ) flux calibrated chromospheric activity indices to exam…

astro-ph.SR2025

Variability of H $I^\pm$ chromospheric activity of solar-like stars revealed by the time-domain data of LAMOST Medium-Resolution Spectroscopic Survey

Han He, Ali Luo, Haotong Zhang +1

The variability of H $I^\pm$ chromospheric activity of solar-like stars is investigated by using the time-domain data of LAMOST Medium-Resolution Spectroscopic Survey (MRS). We use $R_…

astro-ph.SR2024

Stellar Chromospheric Activity Database of Solar-like Stars Based on the LAMOST Low-Resolution Spectroscopic Survey: II. the bolometric and photospheric calibration

Weitao Zhang, Jun Zhang, Han He +2

The dependence of stellar magnetic activity on stellar parameters would be inspired by the chromospheric activity studies based on the large-scale spectroscopic surveys. The Ca II…

Stellar Chromospheric Activity Database of Solar-like Stars Based on the LAMOST Low-Resolution Spectroscopic Survey III. Calibrating the Chromospheric Basal Flux and the Connection to Stellar Rotation

Variability of HI^± chromospheric activity of solar-like stars revealed by the time-domain data of LAMOST Medium-Resolution Spectroscopic Survey

Stellar Chromospheric Activity Database of Solar-like Stars Based on the LAMOST Low-Resolution Spectroscopic Survey: II. the bolometric and photospheric calibration

Variability of H $I^\pm$ chromospheric activity of solar-like stars revealed by the time-domain data of LAMOST Medium-Resolution Spectroscopic Survey