THE METALLICITY OF THE HD 98800 SYSTEM
THE METALLICITY OF THE HD 98800 SYSTEM
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DOI：
10.1088/0004-637x/698/1/660
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发表时间：
2009-05
期刊：
影响因子：
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通讯作者：
T. Laskar;D. Soderblom;J. A. Valenti;John R. Stauffer
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文献类型：
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作者：
T. Laskar;D. Soderblom;J. A. Valenti;John R. Stauffer
如果组成恒星的质量、金属度和光度已知，前主序列(PMS)双星和多星能够对恒星模型进行关键测试。我们分析了四星系统HD-98800的高分辨率、高信噪比的梯形谱，并利用计算得到的光谱合成对合成光谱进行了拟合，得到了各组分的全部合理的恒星参数。我们一致地发现，亚太阳金属丰度产额与较低的χ2值相吻合，总体最佳拟合为[M/H]=−0.20±0.10。这种金属丰度似乎与高清98800组件的测量质量和亮度的PMS演化轨迹一致，但需要对系统和建模进行额外的限制。
Pre-main-sequence (PMS) binaries and multiples enable critical tests of stellar models if masses, metallicities, and luminosities of the component stars are known. We have analyzed high-resolution, high signal-to-noise echelle spectra of the quadruple-star system HD 98800 and using spectrum synthesis computed fits to the composite spectrum for a full range of plausible stellar parameters for the components. We consistently find that subsolar metallicity yields fits with lower χ2 values, with an overall best fit of [M/H] = −0.20 ± 0.10. This metallicity appears to be consistent with PMS evolutionary tracks for the measured masses and luminosities of the components of HD 98800 but additional constraints on the system and modeling are needed.