Element abundance inhomogeneity in the interstellar medium based on the data of HDE 226868 (Cyg X-1) and $\alpha$ Cam
Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki, Uchenye Zapiski Kazanskogo Universiteta. Seriya Fiziko-Matematicheskie Nauki, Tome 153 (2011) no. 2, pp. 102-107
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Synthetic spectrum modelling with allowance for non-LTE effects was used to determine element abundances in the atmospheres of two O-supergiants with similar physical characteristics: HDE 226868 (Cyg X-1 optical component) and $\alpha$ Cam localized at a distance of 2.5–2.7 kpc from each other. The average CNO, as well as Al, S, and Zn abundance differences are 0.15–0.30 dex. HDE 226868 has higher abundances compared to $\alpha$ Cam. The differences are in good qualitative agreement with heavy element distribution over the Galaxy disk derived by Luck et al. on the basis of 50 galactic Cepheids. This fact confirms the inhomogeneity of heavy element distribution on the scale of 2 kpc and is in agreement with the concept of preservation of the intrinsic particularities of interstellar medium “superclouds” on a time-scale of more than 1 Gyr.
Keywords:
element abundances, interstellar matter inhomogeneity, superclouds, O-supergiant, spectrum modelling, non-LTE models, stellar atmospheres.
@article{UZKU_2011_153_2_a10,
author = {E. A. Karitskaya and N. G. Bochkarev and V. V. Shimansky and G. A. Galazutdinov},
title = {Element abundance inhomogeneity in the interstellar medium based on the data of {HDE} 226868 {(Cyg~X-1)} and $\alpha${~Cam}},
journal = {U\v{c}\"enye zapiski Kazanskogo universiteta. Seri\^a Fiziko-matemati\v{c}eskie nauki},
pages = {102--107},
publisher = {mathdoc},
volume = {153},
number = {2},
year = {2011},
language = {ru},
url = {http://geodesic.mathdoc.fr/item/UZKU_2011_153_2_a10/}
}
TY - JOUR AU - E. A. Karitskaya AU - N. G. Bochkarev AU - V. V. Shimansky AU - G. A. Galazutdinov TI - Element abundance inhomogeneity in the interstellar medium based on the data of HDE 226868 (Cyg X-1) and $\alpha$ Cam JO - Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki PY - 2011 SP - 102 EP - 107 VL - 153 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/UZKU_2011_153_2_a10/ LA - ru ID - UZKU_2011_153_2_a10 ER -
%0 Journal Article %A E. A. Karitskaya %A N. G. Bochkarev %A V. V. Shimansky %A G. A. Galazutdinov %T Element abundance inhomogeneity in the interstellar medium based on the data of HDE 226868 (Cyg X-1) and $\alpha$ Cam %J Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki %D 2011 %P 102-107 %V 153 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/UZKU_2011_153_2_a10/ %G ru %F UZKU_2011_153_2_a10
E. A. Karitskaya; N. G. Bochkarev; V. V. Shimansky; G. A. Galazutdinov. Element abundance inhomogeneity in the interstellar medium based on the data of HDE 226868 (Cyg X-1) and $\alpha$ Cam. Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki, Uchenye Zapiski Kazanskogo Universiteta. Seriya Fiziko-Matematicheskie Nauki, Tome 153 (2011) no. 2, pp. 102-107. http://geodesic.mathdoc.fr/item/UZKU_2011_153_2_a10/