Velocity field of the stellar wind of the Wolf-Rayet star in the V 444 Cyg binary system: A parametric model

被引：4

作者：

Antokhin, II ^{[1
]}

Cherepashchuk, AM ^{[1
]}

机构：

[1] Moscow MV Lomonosov State Univ, Sternberg Astron Inst, Moscow 119899, Russia

来源：

ASTRONOMY REPORTS | 2001年 / 45卷 / 04期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1134/1.1361318

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

An analysis of the lambda 4244 Angstrom continuum light curve of the eclipsing variable V444 Cyg is used to reconstruct the velocity law v(r) of the stellar wind of the WR star in terms of Lamers parametric and power-law models. Both models are inconsistent with the observed light curve, and can be rejected at the < 2% significance level. Departures of the Lamers parametric relation from the empirical v(r) law reconstructed in previous papers from the same <lambda> 4244 Angstrom light curve on sets of concave and convexo-concave functions are statistically significant. The stellar wind of the WN5 star continues to accelerate at a considerable distance from the star's center. This corresponds to an acceleration parameter beta > 1 in terms of a coarse Lamers-law approximation for the empirical v(r) field. (C) 2001 MAIK "Nauka/Interperiodica".

引用

页码：269 / 280

页数：12

共 28 条

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