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PTP Online Top > Supplement (1987) > No.91

Prog. Theor. Phys. Supplement No.91 (1987) pp. 299-313

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Pion Condensations and Neutron Star Phenomena

Toshitaka Tatsumi

Department of Physics, Kyoto University, Kyoto 606

(Received June 15, 1987)

Abstract:

Properties of three pion condensations (neutral (π0), charged (πc) and combined (π0-πc) ones) and their consequences on the neutron star phenomena, e.g., the cooling, are discussed with a realistic treatment, in which we consider the isobar Δ(1232) degrees of freedom, baryon-baryon short-range correlations described in terms of the Landau-Migdal parameter baryon-baryon short-range correlations described in terms of the Landau-Migdal parameter g', and form factors in the π-baryon vertices. Special attention is paid for the discussion of combined π0-πc condensation, and then the equation of state and thermal properties such as the neutrino emission or the neutrino transport are considered in a unified way. The combined π0-πc condensation appears at relatively low densities (3 ∼ 5) ρ0 (ρ0 = 0.17 fm-3 is the nuclear density) dependent on g' and strongly softens the equation of state. As for the thermal properties, the neutrino emissivity and opacity are calculated and their results are compared with those given by other calculations. Furthermore their implications on the cooling of neutron stars are briefly discussed.


URL : http://ptp.ipap.jp/link?PTPS/91/299/
DOI : 10.1143/PTPS.91.299

[ Full Text PDF : FREE ACCESS (862K) ] Citation:

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Citing Article(s) :

  1. Progress of Theoretical Physics Vol. 79 No. 2 (1988) pp. 461-479 :
    Extra Neutrino Emissivity of Neutron Stars under the Combined Condensation of Neutral and Charged Pions
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  2. Progress of Theoretical Physics Vol. 80 No. 1 (1988) pp. 22-27 :
    K-on Condensation and Cooling of Neutron Stars
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  3. Progress of Theoretical Physics Vol. 81 No. 5 (1989) pp. 1006-1020 :
    Binary Sub-Millisecond Pulsar and Rotating Core Collapse Model for SN1987A
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  4. Progress of Theoretical Physics Vol. 83 No. 3 (1990) pp. 499-521 :
    Static and Dynamical Properties of Neutron Stars with Combined π0-πc Condensation
    Takumi Muto and Toshitaka Tatsumi
  5. Progress of Theoretical Physics Vol. 85 No. 4 (1991) pp. 779-804 :
    Elementary Excitations in a Solid Nuclear Matter
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  6. Progress of Theoretical Physics Supplement No.112 (1993) pp. 221-275 :
    Chapter VIII. Implications of Various Hadron Phases to Neutron Star Phenomena
    Takumi Muto, Tatsuyuki Takatsuka, Ryozo Tamagaki and Toshitaka Tatsumi
  7. Progress of Theoretical Physics Supplement No.153 (2004) pp. 174-189 :
    Meson Condensations in High-Density Matter
    Takumi Muto

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