KEK素粒子原子核研究所・理論セミナ―(永田 夏海氏)

 
分類理論セミナー
開始2019/11/28(木)13:30
終了2019/11/28(木)14:30
会場研究本館1階会議室3
講演タイトルLimit on the Axion Decay Constant from the Cooling Neutron Star in Cassiopeia A
講演者永田 夏海 氏(東京大学)
言語英語/English
連絡先ryokokur-AT-post.kek.jp
ウェブサイト
食堂・売店利用予定なし/0

概要

The observed rapid cooling of the neutron star (NS) located at the center of the supernova remnant Cassiopeia A (Cas A) can be explained in the minimal NS cooling scenario. This consequence may be changed if there exists an extra cooling source, such as axion emission. In this talk, I will first give a brief review on the standard NS cooling theory. I will then discuss the Cas A NS cooling in the presence of axion emission. It turns out that we can obtain a lower limit on the axion decay constant from the Cas A NS cooling observation, which is as strong as existing limits set by other astrophysical observations such as SN1987A. I will also talk about some recent progress on the limits on the axion decay constant from NS surface temperature observations.

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