更新的MILES恒星库和恒星星族模型
An updated MILES stellar library and stellar population models
摘要：
（目的）对MILES模型库和恒星星族模型进行了一些改进。我们修正了恒星径向速度中的一些小误差，更精确地测量了库和模型的光谱分辨率，并给出了更好的模型绝对通量校准。（方法）我们使用互相关技术来纠正的径向速度的偏移恒星和惩罚像素拟合方法，连同不同的恒星模板，重新评估的光谱分辨率的MILES恒星库和模型。我们还重新校准了零点通量水平的模型使用一个新的校准方案。最终结果是一个比最初发布的恒星库更均匀校准的恒星库，测量的光谱分辨率为~ 2.5 μ m，几乎与波长恒定，无论是MILES恒星库还是模型。此外，新的绝对通量校准的光谱非常符合预测的基础上独立的光度库。（结论）MILES库和模型的改进版本（版本9.1）可在项目网站（http：//www.example.com）上获得。miles.iac.es
英文摘要：
(Aims) We present a number of improvements to the MILES library and stellar population models. We correct some small errors in the radial velocities of the stars, measure the spectral resolution of the library and models more accurately, and give a better absolute flux calibration of the models. (Methods) We use cross-correlation techniques to correct the radial velocities of the offset stars and the penalised pixel-fitting method, together with different sets of stellar templates, to re-assess the spectral resolution of the MILES stellar library and models. We have also re-calibrated the zero-point flux level of the models using a new calibration scheme. (Results) The end result is an even more homogeneously calibrated stellar library than the originally released one, with a measured spectral resolution of ~2.5Å, almost constant with wavelength, for both the MILES stellar library and models. Furthermore, the new absolute flux calibration for the spectra excellently agrees with predictions based on independent photometric libraries. (Conclusions) This improved version of the MILES library and models (version 9.1) is available at the project's website (http://miles.iac.es).
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