6 papers
Metallicity Distribution in M31 and M33 Based on the Tip-RGB Near-infrared Color
Ying Li, Biwei Jiang, Yi Ren
This study investigates the metallicity distribution in M31 and M33 by using the near-infrared color index of tip-red-giant-branch (TRGB) of the member stars from \cite{2021A…
The Binary Fraction of Red Supergiants in the Magellanic Clouds
Min Dai, Shu Wang, Biwei Jiang
Red supergiants (RSGs), as the descendants of OB-type stars and the progenitors of supernovae, provide crucial insights into the evolution of massive stars, particularly in binary…
New Red Supergiant Stars in the other side of our Galaxy
Lin Zhang, Bingqiu Chen, Yi Ren +3
Red supergiant stars (RSGs) are massive stars in a late stage of evolution, crucial for understanding stellar life cycles and Galactic structure. However, RSGs on the far side of o…
Dependence of Multi-band Absolute Magnitudes and Color Indexes of the Tip of Red Giant Branch Stars on Metallicity in the Galactic Globular Clusters
Zhenzhen Shao, Shu Wang, Biwei Jiang +3
The tip of red giant branch (TRGB) stars have attracted intensive attention in recent years because their -band absolute magnitudes, $M_\rm I$, are often used for distance calib…
Searching for Galactic Red Supergiants with Gaia RVS Spectra
Zehao Zhang, Biwei Jiang, Yi Ren +2
Red supergiants (RSGs) are essential to understanding the evolution and the contribution to the interstellar medium of massive stars. However, the number of identified RSGs within…
Measuring the Diffuse Interstellar Bands at 5780, 5797, and 6614 Ã in Low-Resolution Spectra of Cool Stars from LAMOST
Xiao-Xiao Ma, Jian-Jun Chen, A-Li Luo +7
We attempt to measure the DIBs 5780, 5797 and 6614 in over two million low-resolution spectra of cool stars from LAMOST. Based on the DIB measurements, the correlation…