AMBER/VLTI observations of the B[e] star MWC 300
AMBER/VLTI observations of the B[e] star MWC 300
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B[e] 星 MWC 300 的 AMBER/VLTI 观测
DOI：
10.1051/0004-6361/201219800
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发表时间：
2012
影响因子：
6.5
通讯作者：
S. Robbe
中科院分区：
文献类型：
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作者：
Y. Wang;G. Weigelt;A. Kreplin;K. Hofmann;S. Kraus;A. Miroshnichenko;D. Schertl;A. Chelli;A. D. D. Souza;F. Massi;S. Robbe
目标。我们研究了神秘的B[e]星MWC 300，以毫角秒尺度的角分辨率研究了它的盘和双星。方法。利用VLTI/AMBER仪器对MWC 300进行了H和K波段的观测，并与温度梯度模型进行了比较，得到了模型参数。结果。观测到的低可见度值、可见度的波长依赖性和闭合期的波长依赖性直接表明MWC 300由一个分离的圆盘和一个紧密的双星组成。我们提出了一个由双星和温度梯度盘组成的模型，该模型能够再现可见性、闭合阶段和光谱能量分布。该模型允许我们约束预估的双星分离（~ 4.4 mas或~ 7.9 AU）、双星组分的通量比（~ 2.2）、星盘温度幂律指数和其他参数。
Aims. We study the enigmatic B[e] star MWC 300 to investigate its disk and binary with milli-arcsecond-scale angular resolution. Methods. We observed MWC 300 with the VLTI/AMBER instrument in the H and K bands and compared these observations with temperature-gradient models to derive model parameters. Results. The measured low visibility values, wavelength dependence of the visibilities, and wavelength dependence of the closure phase directly suggest that MWC 300 consists of a resolved disk and a close binary. We present a model consisting of a binary and a temperature-gradient disk that is able to reproduce the visibilities, closure phases, and spectral energy distribution. This model allows us to constrain the projected binary separation (∼4.4 mas or ∼7.9 AU), the flux ratio of the binary components (∼2.2), the disk temperature power-law index, and other parameters.