ORBITAL PARAMETERS FOR THE 250 M⊙ ETA CARINAE BINARY SYSTEM
ORBITAL PARAMETERS FOR THE 250 M⊙ ETA CARINAE BINARY SYSTEM
复制标题
250 M⊙ ETA 船底座双星系统的轨道参数
DOI:
10.3847/0004-637x/825/2/105
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发表时间:
2015
期刊:
影响因子:
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通讯作者:
N. Soker
中科院分区:
文献类型:
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作者:
A. Kashi;N. Soker
We show that recent observations of He i and N ii lines of η Carinae may provide support for an orbital orientation where the secondary star is closest to us at periastron passages. This conclusion is valid both for the commonly assumed masses of the two stars and for the higher stellar mass model where the very massive evolved primary star mass is and its hot secondary star mass is . The latter model better explains the change in the orbital period assuming that the nineteenth-century Great Eruption was powered by accretion onto the secondary star. Adopting the commonly used high eccentricity and inclination , we obtain a good fit to newly released Doppler shift observations of He i emission and absorption lines assuming that they are emitted and absorbed in the acceleration zone of the secondary stellar wind. Our model in which the secondary star is in the foreground at periastron is opposite to the view presented recently in the literature.
影响因子:
6.5
作者:
Brott, I.;Evans, C. J.;Anders, P.
通讯作者:
Anders, P.
DOI:
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发表时间:
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期刊:
影响因子:
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作者:
通讯作者:
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