【摘 要】
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Using the evolutionary population synthesis technique, we present the latest integrated colours for instantaneous burst single stellar populations (SSPs) of dif
【机 构】
：
Yunnan Observatory, National Astronomical Observatories, Chinese Academy of Sciences, PO Box 110, Ku
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Using the evolutionary population synthesis technique, we present the latest integrated colours for instantaneous burst single stellar populations (SSPs) of different metallicities and we investigate their colour evolution. Unlike previous research, we adopt the stellar evolutionary models that employ, amongst other things, recent opacities and a revised equation of state (EOS), and include evolutionary processes such as convective overshooting, thermal pulses and dredge-up. The models are used in the convenient form of analytical fitting functions. In addition, we use the BaSeL model for the library of stellar spectra. This model provides an extensive low-resolution theoretical flux distribution and UB VRIJHKLM colours, which have been calibrated empirically or semi-empirically, for a wide range of stellar parameters.
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