1 abstracts or titles contain neutron star, magnetar or pulsar
[39] arXiv:1002.5043 [pdf, ps, other]
Title: Rotochemical heating in millisecond pulsars with Cooper pairing
Authors:
Cristobal Petrovich,
Andreas Reisenegger
Comments: VIII Symposium in Nuclear Physics and Applications: Nuclear and Particle astrophysics. Appearing in the American Institute of Physics (AIP) conference proceedings
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE)
When a rotating neutron star loses angular momentum, the reduction in the
centrifugal force makes it contract. This perturbs each fluid element, raising
the local pressure and originating deviations from beta equilibrium that
enhance the neutrino emissivity and produce thermal energy. This mechanism is
named rotochemical heating and has previously been studied for neutron stars of
non-superfluid matter, finding that they reach a quasi-steady state in which
the rate that the spin-down modifies the equilibrium concentrations is the same
to that of the neutrino reactions restoring the equilibrium. On the other hand,
the neutron star interior is believed to contain superfluid nucleons, which
affect the thermal evolution of the star by suppressing the neutrino reactions
and the specific heat, and opening new Cooper pairing reactions.
In this work we describe the thermal effects of Cooper pairing with spatially
uniform energy gaps of neutrons and protons on rotochemical heating in
millisecond pulsars (MSPs) when only modified Urca reactions are allowed. We
find that the chemical imbalances grow up to a value close to the energy gaps,
which is higher than the one of the nonsuperfluid case. Therefore, the surface
temperatures predicted with Cooper pairing are higher and explain the recent
measurement of MSP J0437-4715.
Cross-lists for Mon, 1 Mar 10
0 abstracts or titles contain neutron star, magnetar or pulsar
Replacements for Mon, 1 Mar 10
2 abstracts or titles contain neutron star, magnetar or pulsar
- [47] arXiv:0907.5485 (replaced) [pdf, ps, other]
-
Title: A physical interpretation of the variability power spectral components in accreting neutron stars
Authors:
Adam Ingram,
Chris Done
Comments: 5 pages, 6 figures
Subjects: Solar and Stellar Astrophysics (astro-ph.SR)
- [48] arXiv:0909.3583 (replaced) [pdf, ps, other]
-
Title: Searches for gravitational waves from known pulsars with S5 LIGO data
Authors:
The LIGO Scientific Collaboration,
The Virgo Collaboration:
B. P. Abbott,
R. Abbott,
F. Acernese,
R. Adhikari,
P. Ajith,
B. Allen,
G. Allen,
M. Alshourbagy,
R. S. Amin,
S. B. Anderson,
W. G. Anderson,
F. Antonucci,
S. Aoudia,
M. A. Arain,
M. Araya,
H. Armandula,
P. Armor,
K. G. Arun,
Y. Aso,
S. Aston,
P. Astone,
P. Aufmuth,
C. Aulbert,
S. Babak,
P. Baker,
G. Ballardin,
S. Ballmer,
C. Barker,
D. Barker,
F. Barone,
B. Barr,
P. Barriga,
L. Barsotti,
M. Barsuglia,
M. A. Barton,
I. Bartos,
R. Bassiri,
M. Bastarrika,
Th. S. Bauer,
B. Behnke,
M. Beker,
M. Benacquista,
J. Betzwieser,
P. T. Beyersdorf,
S. Bigotta,
I. A. Bilenko,
G. Billingsley,
S. Birindelli,
R. Biswas,
M. A. Bizouard,
E. Black,
J. K. Blackburn,
L. Blackburn,
D. Blair,
B. Bland,
C. Boccara,
T. P. Bodiya,
L. Bogue,
F. Bondu,
L. Bonelli, et al. (619 additional authors not shown)
Comments: 39 pages, 5 figures, Accepted in The Astrophysical Journal
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE); Galaxy Astrophysics (astro-ph.GA); General Relativity and Quantum Cosmology (gr-qc)
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