Spectral and photographic studies of the known T association in the neighborhood of Cyg OB7 |
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| Authors: | N D Melikian V S Tamazian A A Karapetian |
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| Institution: | (1) V. A. Ambartsumyan Byurakan Astrophysical Observatory, Armenia;(2) Astronomical Observatory “Ramón María Aller”, University of Santiago de Compostela, Spain |
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| Abstract: | Spectral and photographic observations of an 11′×11′ region in the center of the known association Cyg OB7 are presented.
The observations were made on the 2.6-m telescope of the Byurakan Astrophysical Observatory in 2004. The spectral camera SCORPIO,
a multiregime focal reducer for the primary focus, was used. One new HH node and three new emission stars were discovered
in the region under study. One of the previously known emission stars is found to have spectral class M0Ve and to lie at a
distance of 200 pc. Some variability is detected in the brightness of a known infrared nebula and the cometary nebula CN2.
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Translated from Astrofizika, Vol. 49, No. 3, pp.375–390 (August 2006). |
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| Keywords: | stars emission lines-association-individual Cyg OB7 |
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