Spectra of Neutron Stars with Strongly Magnetized Hydrogen Atmospheres

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Chandra Proposal Id #06500950

Scientific paper

Neutron stars are unique laboratories for matter at extreme densities and magnetic field strengths. Much of the physics is encapsulated in neutron star spectra, but until recently no suitable sources were known. However, over the last year photospheric absorption features - likely due to hydrogen in strongly magnetized atmospheres - have been found for three nearby neutron stars. We propose to obtain high-quality, 300 ks LETG spectra of the two brightest sources. These data will allow examination of the absorption features and permit searches for other associated features. With detailed understandings of these lines one could measure the surface magnetic fields, compositions and temperatures, eventually leading to direct constraints on the equation of state at supra-nuclear densities.

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