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Titolo: On the nature of the residual magnetic fields in millisecond pulsars
Autore: Konenkov, D; Geppert, U;
- Indirizzi:
- AF Ioffe Inst Phys & Technol, St Petersburg 194021, Russia AF Ioffe Inst Phys & Technol St Petersburg Russia 194021 194021, Russia Astrophys Inst Potsdam, D-14482 Potsdam, Germany Astrophys Inst Potsdam Potsdam Germany D-14482 D-14482 Potsdam, Germany
- Titolo Testata:
- ASTRONOMY & ASTROPHYSICS
fascicolo: 2,
volume: 372,
anno: 2001,
pagine: 583 - 587
- SICI:
- 1432-0746(200106)372:2<583:OTNOTR>2.0.ZU;2-O
- Fonte:
- ISI
- Lingua:
- ENG
- Soggetto:
- ISOLATED NEUTRON-STARS; FLUX EXPULSION; EVOLUTION; DECAY; CORE; SUPERCONDUCTIVITY; SUPERFLUID; CRUST;
- Keywords:
- stars : neutron; stars : magnetic fields;
- Tipo documento:
- Article
- Natura:
- Periodico
- Settore Disciplinare:
- Physical, Chemical & Earth Sciences
- Citazioni:
- 29
- Recensione:
- Indirizzi per estratti:
- Indirizzo: Konenkov, D AF Ioffe Inst Phys & Technol, Politekhnicheskaya 26, St Petersburg 194021,Russia AF Ioffe Inst Phys & Technol Politekhnicheskaya 26 St Petersburg Russia 194021
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- Citazione:
- D. Konenkov e U. Geppert, "On the nature of the residual magnetic fields in millisecond pulsars", ASTRON ASTR, 372(2), 2001, pp. 583-587
Abstract
We consider the expulsion of proton fluxoids along neutron vortices from the super fluid/superconductive core of neutron star with weak (B < 10(10) G) magnetic field. The velocity of fluxoids is calculated from the balance of buoyancy, drag and crustal forces. We show, that the proton fluxoids can leave the super fluid core sliding along the neutron vortices on a timescale of about 10(7) years. An alternative possibility is that fluxoids are aligned with the vortices on the same timescale. As the result, non-aligned surface magnetic fields of millisecond pulsars can be sustained for <greater than or similar to>10(9) years only in case of a comparable dissipation timescale of the currents in the neutron star crust. This defines upper limitsof the impurity concentration in the neutron star crust: Q less than or similar to 0.1 if a stiff equation of state determines the density profile.
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Documento generato il 20/05/13 alle ore 23:50:54