Influence of MHD waves on thermonuclear burning in surface layers of neutron stars: The nature of gamma-bursts

1981 ◽  
Vol 77 (2) ◽  
pp. 469-477 ◽  
Author(s):  
I. G. Mitrofanov ◽  
V. M. Ostryakov
Keyword(s):  
Neutron Stars ◽  
Mhd Waves ◽  
Surface Layers ◽  
Thermonuclear Burning

scholarly journals COOLING AND DETECTABILITY OF NEUTRON STARS

1966 ◽  
Vol 44 (8) ◽  
pp. 1863-1894 ◽  
Author(s):  
Sachiko Tsuruta ◽  
A. G. W. Cameron
Keyword(s):  
Neutron Stars ◽  
Surface Composition ◽  
High Mass ◽  
Nuclear Potential ◽  
Surface Layers ◽  
Stellar Radius ◽  
Cooling Behavior ◽  
Low Mass ◽  
Fast Cooling ◽  
Bremsstrahlung Process

Surface properties, temperature effects, cooling behavior, and observability of neutron stars have been studied. For this purpose, the opacity of the surface layers is calculated both for a pure iron and a pure magnesium composition. It is found that the nondegenerate layers are only a few meters thick and in no case exceed 1% of the stellar radius. The star cools mainly through neutrino emission when [Formula: see text], but at lower temperatures the cooling is primarily through electromagnetic radiation. The neutrino cooling mechanisms included were the neutrino plasma process, the URCA process, and the neutrino bremsstrahlung process. The cooling behavior is quite complicated, with the rate of cooling generally depending on mass, nuclear potential, and surface composition, among which the dependence on mass is the most significant. It will be hard to observe low-mass neutron stars because of fast cooling rates. However, medium-and high-mass stars should still have temperatures exceeding about 2 × 106 °K on the surface for times of the order of 103 to 105 years. Hence, it should not be impossible to observe massive neutron stars relatively close to us, if there is no X-ray emission of larger flux coming from the surrounding region.

scholarly journals Small-Scale Structure Deduced from X- and γ-ray Timing Measurements

2001 ◽  
Vol 205 ◽  
pp. 244-251
Author(s):  
M. Coleman Miller
Keyword(s):  
Black Holes ◽  
Neutron Stars ◽  
Small Scale ◽  
Large Area ◽  
X Ray ◽  
Strong Gravity ◽  
Thermonuclear Burning ◽  
General Relativistic ◽  
Γ Ray ◽  
Area X

X-ray timing observations of neutron stars and black holes are among the few available probes of ultrastrong magnetic fields, strong gravity, high densities, and the propagation of thermonuclear burning. Here we review the evidence for these effects revealed with data from the Rossi Explorer in the last five years. We also discuss the exciting prospects for making the first quantitative tests of strong-gravity general relativistic predictions with a large-area X-ray timing mission.

Studying the influence of turbulent mixing on thermonuclear burning regimes during X-ray bursts of neutron stars using the K ε model

2007 ◽  
Vol 33 (2) ◽  
pp. 80-92 ◽  
Author(s):  
V. A. Simonenko ◽  
D. A. Gryaznykh ◽  
N. G. Karlykhanov ◽  
V. A. Lykov ◽  
A. N. Shushlebin
Keyword(s):  
Neutron Stars ◽  
Turbulent Mixing ◽  
X Ray ◽  
Thermonuclear Burning

scholarly journals The onset of low Prandtl number thermal convection in thin spherical shells

2017 ◽  
Vol 13 (S337) ◽  
pp. 336-337
Author(s):  
Ferran Garcia ◽  
Frank R. N. Chambers ◽  
Anna L. Watts
Keyword(s):  
Aspect Ratio ◽  
Prandtl Number ◽  
Neutron Stars ◽  
Time Scales ◽  
Thermal Convection ◽  
Convective Cell ◽  
Spherical Shells ◽  
Cell Pattern ◽  
Thermonuclear Burning ◽  
Prandtl Numbers

AbstractIn this study the onset of stress-free Boussinesq thermal convection in rotating spherical shells with aspect ratio η = rinner/router = 0.9, Prandtl numbers Pr ∈ [10−4, 10−1], and Taylor numbers Ta ∈ [104, 1012] is considered. We focus on the form of the convective cell pattern that develops, and on its time scales, since this may have observational consequences for thermonuclear burning and the development of burst oscillations in the exploding oceans of accreting neutron stars (Watts (2012)).

scholarly journals Turbulent Mixing in the Surface Layers of Accreting Neutron Stars

2007 ◽  
Vol 663 (2) ◽  
pp. 1252-1268 ◽  
Author(s):  
Anthony L. Piro ◽  
Lars Bildsten
Keyword(s):  
Neutron Stars ◽  
Turbulent Mixing ◽  
Surface Layers

Convection in the Surface Layers of Neutron Stars

1997 ◽  
Vol 480 (1) ◽  
pp. 358-363 ◽  
Author(s):  
Juan A. Miralles ◽  
V. Urpin ◽  
K. Van Riper
Keyword(s):  
Neutron Stars ◽  
Surface Layers
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