33 citations · 33 across the 5 of their papers we have counts for
6 papers
Evolution of Stellar Activity and Habitable Zone II: Ca H&K Emissions of Late-type Dwarfs
Henggeng Han, Song Wang, Xue Li +3
Stellar chromospheric activity serves as a valuable proxy for estimating stellar ages, though its applicable range and accurate functional form are still debated. In this study, ut…
Evolution of Stellar Activity and Habitable zone: I. Ultraviolet Emission of Dwarfs in Open Clusters and Field Stars
Xue Li, Song Wang, Jun Ma +3
Near-ultraviolet (NUV) radiation from dwarf stars plays a critical role in shaping the habitability of planetary systems, yet its long-term evolution across different spectral type…
Four ages of rotating stars in the rotation--activity relationship and gyrochronology
Huiqin Yang, Jifeng Liu, Roberto Soria +4
Gyrochronology and the rotation--activity relationship are standard techniques used to determine the evolution phase.The mismatch in the definition of the evolutionary phases has s…
Impact of Spectral Resolution on S-index and Its Application to Spectroscopic Surveys
Henggeng Han, Song Wang, Xue Li +2
Utilizing the PHOENIX synthetic spectra, we investigated the impact of spectral resolution on the calculation of -indices. We found that for spectra with a resolution lower than…
Revisiting the activity-rotation relation for evolved stars
Henggeng Han, Song Wang, Xue Li +2
The magnetic dynamo mechanism of giant stars remains an open question, which can be explored by investigating their activity-rotation relations with multiple proxies. By using the…
A potential mass-gap black hole in a wide binary with a circular orbit
Wang Song, Zhao Xinlin, Feng Fabo +28
Mass distribution of black holes identified through X-ray emission suggests a paucity of black holes in the mass range of 3 to 5 solar masses. Modified theories have been devised t…