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Record Details

Record 17 of 2666
A new class of g-modes in neutron stars
External Online Source: doi:10.1086/171645
Author and Affiliation:
Reisenegger, Andreas(NASA, Washington, DC, United States)
Goldreich, Peter(California Inst. of Technology, Pasadena, United States)
Abstract: Because a neutron star is born hot, its internal composition is close to chemical equilibrium. In the fluid core, this implies that the ratio of the number densities of charged particles (protons and electrons) to neutrons is an increasing function of the mass density. This composition gradient stably stratifies the matter giving rise to a Brunt-Vaisala frequency N of about 500/s. Consequently, a neutron star core provides a cavity that supports gravity modes (g-modes). These g-modes are distinct from those previously identified with the thermal stratification of the surface layers and the chemical stratification of the crust. We compute the lowest-order, quadrupolar, g-modes for cold, Newtonian, neutron star models with M/solar M = 0.581 and M/solar M = 1.405, and show that the crustal and core g-modes have similar periods. We also discuss damping mechanisms and estimate damping rates for the core g-modes. Particular attention is paid to damping due to the emission of gravitational radiation.
Publication Date: Aug 10, 1992
Document ID:
19930028523
(Acquired Dec 28, 1995)
Accession Number: 93A12520
Subject Category: ASTROPHYSICS
Document Type: Journal Article
Publication Information: Astrophysical Journal, Part 1 (ISSN 0004-637X); 395; 1; p. 240-249.
Publisher Information: United States
Contract/Grant/Task Num: NSF AST-89-13664; NAGW-1303; NAGW-2372
Financial Sponsor: NASA; United States
Organization Source: NASA; Washington, DC, United States
Description: 10p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: BRUNT-VAISALA FREQUENCY; CHARGED PARTICLES; HOT STARS; NEUTRON STARS; STELLAR OSCILLATIONS; GRAVITATIONAL EFFECTS; GRAVITATIONAL WAVES; STELLAR CORES
Imprint And Other Notes: Astrophysical Journal, Part 1 vol. 395, no. 1 p. 240-249. Aug. 10, 1992
Availability Source: Other Sources
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