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Title: Nonuniform nuclear structures and QPOs in giant flares

Abstract

We show that the shear modes in the neutron star crust are quite sensitive to the existence of nonuniform nuclear structures, the so-called 'pasta'. Due to the existence of pasta phase, the frequencies of shear modes are reduced. Since the torsional shear frequencies depend strongly on the structure of pasta phase, through the observations of stellar oscillations, one can probe the pasta structure in the crust. Additionally, considering the effect of pasta phase, we show the possibility to explain all the observed frequencies in the SGR 1806-20 with using only crust torsional oscillations.

Authors:
 [1]
  1. Division of Theoretical Astronomy, National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588 (Japan)
Publication Date:
OSTI Identifier:
22075768
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1484; Journal Issue: 1; Conference: Conference on origin of matter and evolution of galaxies 2011, Wako (Japan), 14-17 Nov 2011; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTROPHYSICS; NEUTRON STARS; NUCLEAR MATTER; NUCLEAR STRUCTURE; OSCILLATIONS; PROBES; PULSATIONS; SHEAR; STELLAR RADIATION

Citation Formats

Sotani, Hajime. Nonuniform nuclear structures and QPOs in giant flares. United States: N. p., 2012. Web. doi:10.1063/1.4763420.
Sotani, Hajime. Nonuniform nuclear structures and QPOs in giant flares. United States. doi:10.1063/1.4763420.
Sotani, Hajime. Mon . "Nonuniform nuclear structures and QPOs in giant flares". United States. doi:10.1063/1.4763420.
@article{osti_22075768,
title = {Nonuniform nuclear structures and QPOs in giant flares},
author = {Sotani, Hajime},
abstractNote = {We show that the shear modes in the neutron star crust are quite sensitive to the existence of nonuniform nuclear structures, the so-called 'pasta'. Due to the existence of pasta phase, the frequencies of shear modes are reduced. Since the torsional shear frequencies depend strongly on the structure of pasta phase, through the observations of stellar oscillations, one can probe the pasta structure in the crust. Additionally, considering the effect of pasta phase, we show the possibility to explain all the observed frequencies in the SGR 1806-20 with using only crust torsional oscillations.},
doi = {10.1063/1.4763420},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1484,
place = {United States},
year = {2012},
month = {11}
}