3 years ago

Testing exterior spacetime of the neuron star via X-ray reflection spectroscopy.

M. Ghasemi-Nodehi

Exterior geometry of neutron star can be approximated by relativistic multipole moments of parametrized metric using Ernst potential formalism. This spacetime can be tested with electromagnetic waves observation of astrophysical black holes. In the present paper, I simulate X-ray reflection spectra of a thin accretion disk with future X-ray missions. The purpose of this work is to understand whether X-ray reflection spectroscopy can distinguish the neutron star from Kerr solution of General Relativity. I found that for the higher value of spin and multipole moments parameters there are small differences and make it hard to be distinguished from Kerr case and electromagnetic waves observation of slow rotating neutron stars are marginally consistent with Kerr black holes of General Relativity.

Publisher URL: http://arxiv.org/abs/1801.04657

DOI: arXiv:1801.04657v1

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