2 papers
astro-ph.SR2026
Revisiting Ca II Activity Indices in FGK Stars: Systematic Biases in Infrared Triplet Measurements
Xiaozhen Yang, Xiaoting Fu, Mingjie Jian +10
Synthetic-template subtraction is widely used to measure chromospheric activity in large spectroscopic surveys. However, many solar-like FGK stars show systematically negative Ca I…
astro-ph.SR2025
The survey of DA double white dwarf candidates based on DESI EDR
Ziyue Jiang, Hailong Yuan, Zhongrui Bai +9
Mergers of double white dwarfs are considered significant potential progenitors of type Ia supernovae. Although there is no direct observational evidence to definitively determine…