On the Nature of Anomalous Reddening of the Hypergiant Cygnus OB2 #12

被引：0
|
作者：
Maryeva, O. V. [1 ]
Chentsov, E. L. [1 ]
Goranskij, V. P. [2 ]
Dyachenko, V. V. [1 ]
Karpov, S. V. [1 ,3 ]
机构：
[1] Russian Acad Sci, Special Astrophys Observ, Nizhnii Arkhyz, Russia
[2] Moscow MV Lomonosov State Univ, Sternberg Astron Inst, Moscow, Russia
[3] Kazan Volga Reg Fed Univ, Kazan, Russia
来源：
STARS: FROM COLLAPSE TO COLLAPSE | 2017年 / 510卷
关键词：
ASSOCIATION; STARS;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
To explain the nature of the anomalously high reddening (A(v) similar or equal to 10 mag) towards one of the most luminous stars in the Galaxy - Cyg OB2 #12 (B5 Ia-0), also known as MT304, we carried out spectro-photometric observations of 24 stars located in its vicinity. We included five new B-stars to the members of Cygnus OB2, and for five more photometrically selected stars we spectroscopically confirmed their membership. We constructed the map of interstellar extinction within 2'5 radius and found that interstellar extinction increases towards MT304. The increase of reddening suggests that the reddening excess may be caused by the circumstellar shell ejected by the star during its evolution. We also report the detection of a second component of MT304, and discovery of an even fainter third component, based on data of speckle interferometric observations taken with the Russian 6-m telescope.
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页码：187 / 191
页数：5
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