| Item type |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2010-03-31 |
| タイトル |
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|
タイトル |
Occurrence of Hyperon Superfluidity in Neutron Star Cores |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 著者 |
TAKATSUKA, Tatsuyuki
NISIZAKI, Shigeru
YAMAMOTO, Yasuo
TAMAGAKI, Ryozo
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| 著者(機関) |
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|
値 |
Faculty of Humanities and Social Sciences, Iwate University |
| 著者(機関) |
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値 |
Faculty of Humanities and Social Sciences, Iwate University |
| 著者(機関) |
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|
値 |
Physics Section, Tsuru University |
| 登録日 |
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日付 |
2010-03-31 |
| 書誌情報 |
Progress of Theoretical Physics
巻 115,
号 2,
p. 355-379,
発行日 2006-01-01
|
| ISSN |
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収録物識別子タイプ |
ISSN |
|
収録物識別子 |
0033-068X |
| Abstract |
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内容記述タイプ |
Other |
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内容記述 |
Superfluidity of Λ and Σ^- admixed in neutron star (NS) cores is investigated realistically for hyperon (Y)-mixed NS models obtained using a G-matrix-based effective interaction approach. Numerical results for the equation of state (EOS) with the mixing ratios of the respective components and the hyperon energy gaps including the temperature dependence are presented. These are meant to serve as physical inputs for Y-cooling calculations of NSs. By paying attention to the uncertainties of the EOS and the YY interactions, it is shown that both Λ and Σ^- are superfluid as soon as they appear although the magnitude of the critical temperature and the density region where superfluidity exists depend considerably on the YY pairing potential. Considering momentum triangle condition and the occurrence of superfluidity, it is found that a so-called "hyperon cooling" (neutrino-emission from direct Urca process including Y) combined with Y-superfluidity may be able to account for observations of the colder class of NSs. It is remarked that Λ-hyperons play a decisive role in the hyperon cooling scenario. Some comments are given regarding the consequences of the less attractive ΛΛ interaction recently suggested by the "NAGARA event" _<Λ^^6Λ>He. |
| 出版者 |
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出版者 |
Progress of Theoretical Physics |
| 権利 |
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|
権利情報 |
Copyright © 2006 Progress of Theoretical Physics |
| DOI |
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関連タイプ |
isVersionOf |
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|
識別子タイプ |
DOI |
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|
関連識別子 |
10.1143/PTP.115.355 |
| 著者版フラグ |
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出版タイプ |
AM |
|
出版タイプResource |
http://purl.org/coar/version/c_ab4af688f83e57aa |
ptp-v115n2p355-379.pdf (355.6 kB)
