Partially ionized atmospheres of neutron stars with strong magnetic fields |
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| Institution: | 1. Ioffe Physico-Technical Institute, 194021 St. Petersburg, Russia;2. Department of Astronomy, Cornell University, Ithaca, NY 14853, USA;3. Ecole Normale Supérieure de Lyon, CRAL (UMR CNRS No. 5574), 46 allée d’Italie, 69364 Lyon, France;4. Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, Stanford, CA 94309, USA;1. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street MS-70, Cambridge, MA 02138, USA;2. Jansky Fellow, National Radio Astronomy Observatory, and Harvard-Smithsonian Center for Astrophysics, 60 Garden Street MS-70, Cambridge, MA 02138, USA |
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| Abstract: | We construct hydrogen atmosphere models for strongly magnetized neutron stars in thermodynamic equilibrium, taking into account partial ionization. The presence of bound states affects the equation of state, absorption coefficients, and polarizability tensor of a strongly magnetized plasma. Therefore the partial ionization influences the polarization vectors and opacities of normal electromagnetic waves, and thus the spectra of outgoing radiation. Here, we review a model suitable for the most typical neutron-star atmospheres and focus on the problems that remain to be solved for its extension to other atmospheric parameters. |
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