就星團最大質量給定古星系盤化學標記限制


eminar - Chemical Tagging Constraint on the Maximum Star Cluster Mass in the Galactic Old Disk
 
It is now well-established that the elemental abundance patterns of stars hold key clues not only to their formation but also to the assembly histories of galaxies. One of the most exciting possibilities is the use of stellar abundance patterns as "chemical tags" to identify stars that were born in the same molecular cloud. We find that different cluster mass functions imprint different degrees of clumpiness in chemical space. These differences provide the opportunity to statistically reconstruct the slope and high mass cutoff of CMF and its evolution through cosmic time. By studying the APOGEE data set, we show that the Galactic disk is unlikely to have formed clusters more massive than 3x10^7 solar mass at any point in its history and put a first abundance-based constraint on the cluster mass function for the old disk stars in the Milky Way.
 
時間:2015.12.23(三) 14:00
地點:香港大學 莊月明物理樓 522室
講者:Mr. Yuan-Sen TING 丁源森 先生(Harvard University)
語言:英語

【訊息由張詠倫提供】

此活動由香港大學物理學系主辦。

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