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Friedel crystals and the outer crust of magnetars

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arxiv 1306.4404 v1 pith:3NOWH5Z6 submitted 2013-06-19 astro-ph.HE nucl-th

classification astro-ph.HEnucl-th
keywords friedelmagnetarscrustcrystalfieldsmagneticouterargue
verification ladder T0 review T1 audit T2 compute T3 formal
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The strong magnetic fields found on the surface of magnetars are known to have profound effects in the physics of atoms in magnetar envelopes. We argue that the Friedel oscillations in the Coulomb force between the ions due to electron shielding can, for certain values of the parameters, be the dominant effect determining the crystal structure in the outer crust of magnetars. We estimate the densities and magnetic fields for which this occurs, compute some of the elastic moduli and lattice phonon dispersion relations in this "Friedel crystal" phase.

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