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Hyperon-Mixed Neutron Stars
https://iwate-u.repo.nii.ac.jp/records/13978
https://iwate-u.repo.nii.ac.jp/records/139782df29840-a53d-48d0-8bf6-d66b0a13b637
| 名前 / ファイル | ライセンス | アクション |
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ptps-n156p84-103.pdf (302.0 kB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||||
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| 公開日 | 2010-03-31 | |||||||
| タイトル | ||||||||
| タイトル | Hyperon-Mixed Neutron Stars | |||||||
| 資源タイプ | ||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||
| 資源タイプ | journal article | |||||||
| 著者 |
TAKATSUKA, Tatsuyuki
× TAKATSUKA, Tatsuyuki
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| 著者(機関) | ||||||||
| 値 | Faculty of Humanities and Social Sciences, Iwate University | |||||||
| 登録日 | ||||||||
| 日付 | 2010-03-31 | |||||||
| 書誌情報 |
Progress of theoretical physics. Supplement 号 156, p. 84-103, 発行日 2004-01-01 |
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| ISSN | ||||||||
| 収録物識別子タイプ | ISSN | |||||||
| 収録物識別子 | 0375-9687 | |||||||
| Abstract | ||||||||
| 内容記述タイプ | Other | |||||||
| 内容記述 | Hyperon mixing in neutron star matter is investigated by the G-matrix-based effective interaction approach under the attention to use the YN and the YY potentials compatible with hypernuclear data and is shown to occur at densities relevant to neutron star cores, together with discussions to clarify the mechanism of hyperon contamination. It is remarked that developed Y-mixed phase causes a dramatic softening of the neutron star equation of state and leads to the serious problem that the resulting maximum mass M_<max> for neutron star model contradicts the observed neutron star mass (M_<max> < M_<obs> = 1.44M_⊙), suggesting the necessity of some "extra repulsion" in hypernuclear system. It is shown that the introduction of three-body repulsion similar to that in nuclear system can resolve the serious situation and under the consistency with observation (M_<max> > M_<obs>) the threshold densities for Λ and Σ^- are pushed to higher density side, from 〜 2_<ρ0> to 〜 4_<ρ0> (_<ρ0> being the nuclear density). On the basis of a realistic Y-mixed neutron star model, occurrence of Y-superfluidity essential for "hyperon cooling" scenario is studied and both of Λ- and -Σ^--superfluids are shown to be realized with their critical temperatures 10^<8-9> K, meaning that the "hyperon cooling" is a promising candidate for a fast non-standard cooling demanded for some neutron stars with low surface temperature. A comment is given as to the consequence of less attractive ΛΛ interaction suggested by the "NAGARA event" ^6_<ΛΛ>He. | |||||||
| 出版者 | ||||||||
| 出版者 | Progress of Theoretical Physics | |||||||
| 権利 | ||||||||
| 権利情報 | Copyright (c) 2004 Progress of Theoretical Physics | |||||||
| DOI | ||||||||
| 関連タイプ | isVersionOf | |||||||
| 識別子タイプ | DOI | |||||||
| 関連識別子 | 10.1143/PTPS.156.84 | |||||||
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| 出版タイプ | AM | |||||||
| 出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||||
