naa a22 4500 51073216X CHVBK 20180411082957.0 cr unu---uuuuu 180411e20130701xx s 000 0 eng 10.1134/S1063772913070019 doi (NATIONALLICENCE)springer-10.1134/S1063772913070019 Spectroscopy of 13 high-mass stars in the Cyg OB2 association [Elektronische Daten] [E. Chentsov, V. Klochkova, V. Panchuk, M. Yushkin, D. Nasonov] The NES echelle spectrograph of the 6-m telescope of the Special Astrophysical Observatory has been used to obtain high-resolution spectra for 13 hot O3-B4 stars in the Cyg OB2 association, making it possible to study weak spectral features of stellar and interstellar origin. Velocity fields in the atmospheres and interstellar medium, characteristics of optical spectra and line profiles are investigated. The cascade star-formation scheme for the association is confirmed. Evidence is presented suggesting that the hypergiant Cyg OB2 No. 12 is an LBV object and that its anomalous reddening has a circumstellar nature. Pleiades Publishing, Ltd., 2013 Chentsov E. Special Astrophysical Observatory, Russian Academy of Sciences, 369167, Nizhnii Arkhyz, Karachai-Cherkessian Republic, Russia aut Klochkova V. Special Astrophysical Observatory, Russian Academy of Sciences, 369167, Nizhnii Arkhyz, Karachai-Cherkessian Republic, Russia aut Panchuk V. Special Astrophysical Observatory, Russian Academy of Sciences, 369167, Nizhnii Arkhyz, Karachai-Cherkessian Republic, Russia aut Yushkin M. Special Astrophysical Observatory, Russian Academy of Sciences, 369167, Nizhnii Arkhyz, Karachai-Cherkessian Republic, Russia aut Nasonov D. Institute of Astronomy, Russian Academy of Sciences, ul. Pyatnitskaya 48, 119017, Moscow, Russia aut Astronomy Reports Springer US; http://www.springer-ny.com 57/7(2013-07-01), 527-547 1063-7729 57:7<527 2013 57 11444 https://doi.org/10.1134/S1063772913070019 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S1063772913070019 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Chentsov E. Special Astrophysical Observatory, Russian Academy of Sciences, 369167, Nizhnii Arkhyz, Karachai-Cherkessian Republic, Russia aut NATIONALLICENCE 700 1- Klochkova V. Special Astrophysical Observatory, Russian Academy of Sciences, 369167, Nizhnii Arkhyz, Karachai-Cherkessian Republic, Russia aut NATIONALLICENCE 700 1- Panchuk V. Special Astrophysical Observatory, Russian Academy of Sciences, 369167, Nizhnii Arkhyz, Karachai-Cherkessian Republic, Russia aut NATIONALLICENCE 700 1- Yushkin M. Special Astrophysical Observatory, Russian Academy of Sciences, 369167, Nizhnii Arkhyz, Karachai-Cherkessian Republic, Russia aut NATIONALLICENCE 700 1- Nasonov D. Institute of Astronomy, Russian Academy of Sciences, ul. Pyatnitskaya 48, 119017, Moscow, Russia aut NATIONALLICENCE 773 0- Astronomy Reports Springer US; http://www.springer-ny.com 57/7(2013-07-01), 527-547 1063-7729 57:7<527 2013 57 11444 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer