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Axion Production from Landau Quantization in the Strong Magnetic Field of Magnetars

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arxiv 1707.00384 v1 pith:7DUNZ6PW submitted 2017-07-03 astro-ph.HE hep-phnucl-th

Axion Production from Landau Quantization in the Strong Magnetic Field of Magnetars

Tomoyuki Maruyama , A. Baha Balantekin , Myung-Ki Cheoun , Toshitaka Kajino , Grant J. Mathews This is my paper
classification astro-ph.HE hep-phnucl-th
keywords axioncoolingemissionfieldmagnetarsmagneticstrongelectrons
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We utilize an exact quantum calculation to explore axion emission from electrons and protons in the presence of the strong magnetic field of magnetars. The axion is emitted via transitions between the Landau levels generated by the strong magnetic field. The luminosity of axions emitted by protons is shown to be much larger than that of electrons and becomes stronger with increasing matter density. Cooling by axion emission is shown to be much larger than neutrino cooling by the Urca processes. Consequently, axion emission in the crust may significantly contribute to the cooling of magnetars. In the high-density core, however, it may cause heating of the magnetar.

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