报告题目：New PARSEC database of alpha-enhanced stellar evolutionary tracks and isochrones

　　报告人：符晓婷（意大利国际高等研究院）

　　摘要：Precise studies on the Galactic bulge and multiple populations of globular cluster require stellar model with alpha enhancement and various helium contents. It is also important for extra- Galactic study to have alpha enhanced population synthesis. For this purpose we expand PARSEC model from solar-scaled composition to alpha enhanced mixtures. The new model is calibrated with globular cluster 47Tuc (NGC104). We then apply the calibration and alpha enhanced mixture based on the two 47Tuc populations ( [alpha/Fe] ～0.4 and 0.2) to other metallicities. The new model closes the gap between the observation and model prediction on the RGB bump. Besides the alpha enhanced metal mixture in 47Tuc, we also calculate evolutionary tracks based on metal mixtures from ATLAS9 APOGEE atmosphere model.

　　时间：1月6日上午10:00-11:00

　　地点：天文楼402会议室

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                                              南京大学天文与空间科学学院