Prog. Theor. Phys. Vol. 85 No. 2 (1991) pp. 175-180

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Letters

Effect of Pion Condensation on Keplerian Angular Frequency of Rotating Neutron Stars

Tatsuyuki Takatsuka

College of Humanities and Social Sciences, Iwate University, Morioka 020

(Received September 27, 1990)

Abstract:

Keplerian angular frequency Ω_K for neutron stars with and without pion condensation is investigated for various equations of state which sustain 1.44 M_⊙ mass and satisfy causality. The Ω_K of pion-condensed stars becomes remarkably larger; by about (20 ∼50)% for the star with ∼1.5 M_⊙ mass, for instance. The absolute maximum of Ω_K amounts to (1.3 ∼1.4) ×10⁴ rad/s.

URL : http://ptp.ipap.jp/link?PTP/85/175/
DOI : 10.1143/PTP.85.175

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Citing Article(s) :

Progress of Theoretical Physics Vol. 85 No. 3 (1991) pp. 427-432 :
Spin-Up of Hot Neutron Stars Just Born by the Subsequent Cooling

Tatsuyuki Takatsuka
Progress of Theoretical Physics Supplement No.112 (1993) pp. 1-25 :
Chapter I. Overview

Ryozo Tamagaki
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