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Titolo:
IMPLICATIONS OF VARIOUS HADRON PHASES TO NEUTRON-STAR PHENOMENA
Autore:
MUTO T; TAKATSUKA T; TAMAGAKI R; TATSUMI T;
Indirizzi:
KYOTO UNIV,DEPT PHYS KYOTO 60601 JAPAN IWATE UNIV,COLL HUMANITIES & SOCIAL SCI MORIOKA IWATE 020 JAPAN
Titolo Testata:
Progress of theoretical physics. Supplement
fascicolo: 112, , anno: 1993,
pagine: 221 - 275
SICI:
0375-9687(1993):112<221:IOVHPT>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
SUB-MILLISECOND PULSAR; LARGE MAGELLANIC CLOUD; STRANGE-QUARK MATTER; LAYER-SPIN STRUCTURE; PION-CONDENSATION; VELA PULSAR; NUCLEAR-MATTER; DENSE MATTER; SUPERNOVA 1987A; CRAB PULSAR;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
161
Recensione:
Indirizzi per estratti:
Citazione:
T. Muto et al., "IMPLICATIONS OF VARIOUS HADRON PHASES TO NEUTRON-STAR PHENOMENA", Progress of theoretical physics. Supplement, (112), 1993, pp. 221-275

Abstract

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 inthe presence of combined neutral and charged pion (pi0pi(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 S-1(0) and P-3(2) superfluids having different couplings with thecrust are related to the observed two relaxation times. (2) Extra neutrino emissivity under the pi0pi(c)-condensed phase is studied and each role of the pi0 and pi(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 pi(c)-condensed phase to the pi0pi(c) one is shown to be essential to dynamical proper-ties 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 matterare investigated and energy release of a hot neutron star at birth due to the first order phase transition to a cold pion-condensed neutronstar 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.

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Documento generato il 07/07/20 alle ore 22:22:07