6月13日（木）、Evan Kirby氏（University of Notre Dame）による宇宙創成物理学国際共同大学院（GP-PU）セミナー「Early r-process enrichment in globular clusters」を開催いたします。

■日　　時
2024年6月13日（木）10:00-12:00

■セミナー題目
"Early r-process enrichment in globular clusters"
by Evan Kirby (University of Notre Dame)

■開催形式
対面×オンライン（Zoom）併用
[対面会場] 理学研究科合同B棟745号室 （キャンパスマップ「H-03」の建物です。）

■参加登録
参加者は事前に下記URLで参加登録が必要です
https://us02web.zoom.us/meeting/register/tZErfuqtqDwsG9Be-PpcP-gPtSg23mVC8N-k#/

■概　　要
Stars in nearly all globular clusters show complex relations among the abundances of light elements (up to Na). Many also show anti-correlations of Mg and Al. Until now, only one cluster (M15) conclusively showed any star-to-star variation in neutron-capture elements, like Eu. Using a trick of stellar evolution, I show that these variations are primordial, not caused by external pollution. Then, I show that M92 also has variations in barium and lanthanide abundances (but not first-peak r-process) among the first generation of stars but not the second. The evidence points to a rare source of the main r-process that happened right at the start of the formation of the cluster.

■Point
GSP 1

■お問合せ
物理学専攻（GP-PU）　古城　徹　
E-mail: toru.kojo.b1[at]tohoku.ac.jp
（[at]を@に置き換えてください）