Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Kh. Hovhannessian"'
Autor:
R. Kh. Hovhannessian
Publikováno v:
Astrophysics. 50:194-202
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::15227b78be9f840fc6a30259e19fae44
https://doi.org/10.1007/s10511-007-0019-5
https://doi.org/10.1007/s10511-007-0019-5
Autor:
R. Kh. Hovhannessian
Publikováno v:
Astrophysics. 47:499-504
Relationships between two interstellar reddening-free quantities, the photometric parameter Q and the Balmer jump D, are derived for main sequence O9-G0 stars. We compare our average values of the Balmer jumps for main sequence stars with a theoretic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c823b37932728ddf422058b24d8e2eff
https://doi.org/10.1023/b:asys.0000049788.48071.55
https://doi.org/10.1023/b:asys.0000049788.48071.55
Publikováno v:
Astrophysics. 45:313-321
The degree of polarization of light from stars in 44 O B associations as a function of interstellar absorption is investigated. It is shown that the character of the dependence of P on AV for stars in associations and stars not in associations depend
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e238ab7a76051014a28f2b4a7ea62fea
https://doi.org/10.1023/a:1020139516867
https://doi.org/10.1023/a:1020139516867
Publikováno v:
Astrophysics. 45:25-31
The results of polarimetric and IR (IRAS) observations of 24 B-A-F stars are given. Intrinsic polarization of the light from 11 of the 24 stars is observed. The degree of polarization for the other 13 stars is within the measurement errors. Two-color
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d4eec2ed20a885ccafc1a6d917866f1f
https://doi.org/10.1023/a:1015342508921
https://doi.org/10.1023/a:1015342508921
Publikováno v:
Astrophysics. 44:454-462
The results of an investigation of IR (IRAS) observations of 58 O—B—A—F stars of different luminosity classes, which are mainly members of various associations, are presented. The color indices of these stars are determined and two-color diagra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::67baf5f7c9d573354c2f685bdbc5a58d
https://doi.org/10.1023/a:1014244720865
https://doi.org/10.1023/a:1014244720865
Autor:
R. A. Epremian, R. Kh. Hovhannessian
Publikováno v:
Astrophysics. 41:268-276
The results of an investigation of circwnstellar dust shells around 22 early- type stars with emission lines are given. The absorption at 1640 A, the linear sizes, and the masses of the dust shells were determined. They differ from one another (see T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ba3035dd22580d9c5a92866f985e6843
https://doi.org/10.1007/bf03036096
https://doi.org/10.1007/bf03036096
Autor:
Kh. Hovhannessian, G. Cruz-Gonzalez, S. G. Navarro, Hrant M. Tovmassian, R. A. Epremian, A. A. Karapetian
Publikováno v:
The Astronomical Journal. 115:1083-1095
One hundred eighty-five mostly OB and some early A-type stars are detected at 1640 A with the ultraviolet telescope Glazar aboard the Mir space station in an area of about 8 deg2 in the direction toward the stellar association Cen OB2. The limiting s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8bd87c48c16b4b0f7a3490cb6068eaa5
https://doi.org/10.1086/300237
https://doi.org/10.1086/300237
Autor:
R. Kh. Hovhannessian
Publikováno v:
Astrophysics. 40:373-378
The distribution of B stars in the vicinity of nine southern, long-period (P > 11 days) Cepheids is studied on the basis of U, B, V data. The parameters Q, the normal color indices (B — V)0 and (U — B)0, the color excesses E(B — V), the spectra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9ec79fb9b5d6c881969f72696e5002e7
https://doi.org/10.1007/bf03036026
https://doi.org/10.1007/bf03036026
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 266:337-342
42 OB stars have been observed with the space telescope Glazarat 1640 A in an area of about 17 deg 2 in the direction of the stellar associations Aur OB 1 and 2. Twenty-five of the observed stars of known spectral type and with colorimetric data are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2409c0aa7a25de9fc7feb37369d892c7
https://doi.org/10.1093/mnras/266.2.337
https://doi.org/10.1093/mnras/266.2.337
Publikováno v:
Astrophysics and Space Science. 213:175-183
Using the results of observations of the Carina nebula made with the space telescope Glazar, it is shown that the extinction law for the nebula is abnormal and that there is a single OB star complex within the nebula at a distance of about 2200 pc. I
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::40fd81a96d3314b8325938dce70f342e
https://doi.org/10.1007/bf00658208
https://doi.org/10.1007/bf00658208