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MAGNETARS AS COOLING NEUTRON STARS WITH MAGNETARS AS COOLING NEUTRON STARS WITH INTERNAL HEATING INTERNAL HEATING A.D. Kaminker, D.G. Yakovlev, A.Y. Potekhin,

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Presentation on theme: "MAGNETARS AS COOLING NEUTRON STARS WITH MAGNETARS AS COOLING NEUTRON STARS WITH INTERNAL HEATING INTERNAL HEATING A.D. Kaminker, D.G. Yakovlev, A.Y. Potekhin,"— Presentation transcript:

1 MAGNETARS AS COOLING NEUTRON STARS WITH MAGNETARS AS COOLING NEUTRON STARS WITH INTERNAL HEATING INTERNAL HEATING A.D. Kaminker, D.G. Yakovlev, A.Y. Potekhin, N. Shibazaki*, P. Sternin, and O.Y. Gnedin** Ioffe Physical Technical Institute, St.-Petersburg, Russia *Rikkyo University, Tokyo , Japan **Ohio State University, 760 1/2 Park Street, Columbus, OH 43215, USA Conclusions Introduction Physics input Games with cooling code

2 Thermal balance: Photon luminosity: Heat blanketing envelope: Heat content: Cooling theory with internal heating Main cooling regulators: 1. EOS 2. Neutrino emission 3. Reheating processes 4. Superfluidity 5. Magnetic fields 6. Light elements on the surface Heat transport: - effective thermal conductivity

3 1. EOS: APR III (n, p, e, µ) Gusakov et al. (2005) Akmal-Pandharipande-Ravenhall (1998) -- neutron star models Parametrization: Heiselberg & Hiorth-Jensen (1999) 2. Heat blanketing envelope: -- relation; surface temperature, -- effective temperature; -- surface element

4 1- SGR SGR AXP 1E AXP 1RXS J AXP 4U AXP 1E

5 H H0H0 3. Model of heating: at i ii iii iv

6 No isothermal stage Core — crust decoupling 1- SGR SGR AXP 1E AXP 1RXS J AXP 4U AXP 1E Only outer layers of heating are appropriate for hottest NSs

7 Necessary energy input vrs. photon luminosity into the layer

8 Direct Urca process included Enchanced thermal conductivity Appearance of isothermal layers fromto

9 Conclusions 1.High thermal state of magnetars demand a powerful reheating 2. The heating should be located in a thin layer at : in the outer crust.The heat intensity should range from to Deeper heating would be extremely inefficient due to neutrino radiation 4.Pumping huge energy into deeper layers can not increase Temperature distributions within NS are strongly nonuniform due to thermal decoupling of the outer crust from the inner parts of the star 3. Only ~ 1% of the total energy released in the heat layer can be spent to heat the NS surface


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