ORBITAL PARAMETERS FOR THE 250 M⊙ ETA CARINAE BINARY SYSTEM

ORBITAL PARAMETERS FOR THE 250 M⊙ ETA CARINAE BINARY SYSTEM
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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:
The Astrophysical Journal
影响因子:
--
通讯作者:
N. Soker
N. Soker
中科院分区:
--
文献类型:
--
作者:
A. Kashi;N. Soker

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我们表明,最近对船底座η星He i和N ii线的观测,可能为在近星点通道中次级星星离我们最近的轨道取向提供了支持。这一结论对两颗恒星的一般假设质量和更高恒星质量模型都是有效的,在更高恒星质量模型中,非常大质量的演化主星星星质量为,其热的次级星星质量为。后一个模型更好地解释了轨道周期的变化,假设19世纪的大爆发是由次级星星的吸积提供动力的。采用常用的高偏心率和倾角,我们得到了一个很好的拟合新公布的多普勒频移观测的He i发射和吸收线假设他们的次级恒星风的加速区发射和吸收。我们的模型中,次级星星是在近星点的前景是相反的,最近在文献中提出的观点。
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.
DOI: 10.1051/0004-6361/201016114
发表时间: 2011-06-01
影响因子: 6.5
作者:
Brott, I.;Evans, C. J.;Anders, P.
通讯作者: Anders, P.
托莱多大学(美国)
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