Spectroscopy of 13 high mass stars in the Cyg OB2 association

E. L. Chentsov, V. G. Klochkova, V. E. Panchuk +1

Aiming to explore weak spectral features of stellar and interstellar origin we used the NES echelle spectrograph of the 6-m telescope to obtain high-resolution spectra for 13 hot O…