Study of Integrated Spectra of Four Globular Clusters in M31
  The results of determining the metallicity, age, helium mass fraction (Y) and
abundances of the elements C, N, Mg, Ca, Mn, Ti and Cr by moderate resolution
spectra for four globular clusters in the galaxy M 31: Bol 6, Bol 20, Bol 45
and Bol 50 are presented. The chemical composition for Bol 20 and Bol 50, and Y
for four clusters are determined for the first time. The spectra of the studied
objects were obtained with the 6-meter telescope of the SAO RAS in 2020. All
the clusters under study turned out to be older than 11 Gyrs. The determined
metallicities [Fe/H] are in the range from -1.1 to -0.75 dex. They are lower
than the metallicity of stars of the M 31 halo at a given distance from the
galactic center (R_M31 < 10 kpc). The abundances of the elements of the
alpha-process [alpha/Fe] = ([O/Fe] + [Mg/Fe] + [Ca/Fe])/3 of the four clusters
correspond to those of the stars of the inner halo of M31.
