M dwarf stars are very-low mass stars with reddish color. Their masses are only 0.1-0.6 times the solar mass, and their temperature is about 2000-3000 degrees lower than that of the Sun.
Although M dwarf stars are small, they account for about 70% of the total number of stars in the Milky Way, dominating the faint magnitudes of the Galaxy.
Based on the LAMOST low-resolution spectra, a new study led by Ph.D. Candidate LI Jiadong and Prof. LIU Chao from National Astronomical Observatories of the Chinese Academy of Sciences (NAOC) has estimated the stellar parameters (effective temperature and metallicity) of about 300,000 M dwarf stars, providing the largest spectroscopic M dwarf stellar parameter catalog.
The study was published in The Astrophysical Journal Supplement Series on April 9.
