Chapter VIII Implications of Various Hadron Phases to Neutron Star Phenomena

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概要

• 論文の詳細を見る

• Effects of various hadron phases on thermal and dynamical properties of neutron stars are studied in connection with astronomical phenomena. In particular, nucleon superfluidity and pion condensation are mainly considered. (1) It is shown that ALS solid core and rapid cooling in the presence of combined neutral and charged pion (π^0π^c)-condensed phase give the basis of an extended starquake model which explains both Vela and Crab pulsar glitches consistently. In this model, the neutron ^<1>S_0 and ^<3>P_2 superfluids having different couplings with the crust are related to the observed two relaxation times. (2) Extra neutrino emissivity under the π^0π^c-condensed phase is studied and each role of the π^0 and π^c condensates is clarified. By the use of this emissivity, cooling history of pion-condensed neutron stars are discussed. (3) First order phase transition from the π^c-condensed phase to the π^0π^c one is shown to be essential to dynamical properties of pion-condensed neutron stars. Energy release associated with a mini-collapse is obtained in relation to the anomalous gamma-ray burst, where the dissipation mechanism in the pion-condensed phase is also discussed. (4) Characteristic features of hot and dense supernova matter are investigated and energy release of a hot neutron star at birth due to the first order phase transition to a cold pion-condensed neutron star is discussed in connection with the neutrino burst from the supernova SN1987A. Also the extent of spin-up due to the contraction during the early cooling stage is estimated. (5) Maximum rotation rates of neutron stars with and without pion condensates are obtained, and it is shown that they serve as a probe for the existence of pion condensation in neutron stars.

• 理論物理学刊行会の論文
• 1993-06-20

著者

• Yoshikawa Hiroshi

  Department Of Biopharmaceutics Kyoto Pharmaceutical University:exploratory Development Laboratories

• 武藤 巧

  千葉工大情報科学教育セ

• Yoshikawa H

  Department Of Biopharmaceutics Kyoto Pharmaceutical University:exploratory Development Laboratories

• TATSUMI Toshitaka

  Department of Physics, Kyoto University

• Tatsumi T

  Kyoto Univ. Kyoto Jpn

• Tatsumi Toshitaka

  Department Of Physics Kyoto University

• TAMAGAKI Ryozo

  Department of Physics, Kyoto University

• 武藤 巧

  千葉工業大学情報科学部教育センター物理学教室

• 玉垣 良三

  Kyoto University

• Tatsumi T

  Department Of Physics Kyoto University

• MUTO Takumi

  Department of Physics, Kyoto University

• TAKATSUKA Tatsuyuki

  College of Humanities and Social Sciences, Iwate University

• Muto T

  Department Of Physics Kyoto University

• Muto Takumi

  Department Of Physics Chiba Institute Of Technology

• Tamagaki Ryozo

  Department Of Physcis Kyoto University

• Takatsuka Tatsuyuki

  College Of Humanities And Social Sciences Iwate University

• Takatsuka Tatsuyuki

  College Of Humaniteis And Social Sciences Iwate University

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