Detection of magnetic fields in both B-type components of the ϵ Lupi system: a new constraint on the origin of fossil fields?
Detection of magnetic fields in both B-type components of the ϵ Lupi system: a new constraint on the origin of fossil fields?
复制标题
ε Lupi 系统的两个 B 型组件中的磁场检测：对化石场起源的新限制？
DOI：
10.1093/mnrasl/slv096
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发表时间：
2015
影响因子：
4.8
通讯作者：
the BinaMIcS collaboration
中科院分区：
文献类型：
--
作者：
M. Shultz;G. Wade;E. Alecian;the BinaMIcS collaboration
在BinaMIcS大型项目的背景下，用ESPaDOnS获得了高分辨率的圆偏振光谱观测，揭示了SB2双星系统B3V次级分量中的磁场 $\epsilon$ Lupi （B2/B3）。由于已知B2V主星是磁性的，这是第一次在早期双星系统的两个组成部分都检测到磁场。一次磁极的纵向磁场为 $\sim -200$ g；次级的 $\sim +100$ 假设两颗恒星的磁轴是反对准的，并且大致平行于它们各自的旋转轴，可以用一个模型近似地再现观测结果。估计的磁层半径表明它们的磁层极有可能相互作用。由于许多关于化石磁场不同形成场景的争论都依赖于对近距离双星的研究得出的证据，特别是在近距离双星中磁性ABO恒星的罕见性，以及之前没有任何已知的具有两颗磁性大质量恒星的近距离双星，这一发现可能是对化石磁场起源的重要新限制。
High-resolution circular spectropolarimetric observations, obtained with ESPaDOnS in the context of the BinaMIcS Large Program, have revealed a magnetic field in the B3V secondary component of the SB2 binary system $\epsilon$ Lupi (B2/B3). As the B2V primary is already known to be magnetic, this is the first detection of a magnetic field in both components of an early-type binary system. The longitudinal magnetic field of the primary is $\sim -200$ G; that of the secondary $\sim +100$ G. Observations can be approximately reproduced by a model assuming the magnetic axes of the two stars are anti-aligned, and roughly parallel to their respective rotation axes. Estimated magnetospheric radii indicate a high probability that their magnetospheres are interacting. As many of the arguments for the different proposed formation scenarios of fossil magnetic fields rely upon evidence drawn from investigations of close binaries, in particular the rarity of magnetic ABO stars in close binaries and the previous absence of any known close binary with two magnetic, massive stars, this discovery may be an important new constraint on the origin of fossil magnetic fields.
DOI：
10.1111/j.1365-2966.2009.14694.x
发表时间：
2009
影响因子：
4.8
作者：
Barker A
通讯作者：
Barker A
影响因子：
56.9
作者：
H. Sana;S. D. Mink;A. D. Koter;N. Langer;C. Evans;M. Gieles;E. Gosset;R. Izzard;J. L. Bouquin-J.
通讯作者：
H. Sana;S. D. Mink;A. D. Koter;N. Langer;C. Evans;M. Gieles;E. Gosset;R. Izzard;J. L. Bouquin-J.