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The neutron star mass and radius of Aql X‐1 from quiescent X‐ray emissions
Author(s) -
Luo Y.,
Li Z.
Publication year - 2019
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.201913594
Subject(s) - physics , radius , astrophysics , neutron star , spectral line , x ray , flux (metallurgy) , atmosphere (unit) , nuclear physics , astronomy , computer security , computer science , thermodynamics , materials science , metallurgy
We report the quiescent spectra of neutron star (NS) in Aql X‐1 from XMM‐Newton and Chandra . The NS atmosphere model, NSATMOS, is applied to fit the quiescent spectra. The Monte Carlo Markov Chain algorithm is used to constrain the NS mass and radius in Aql X‐1. We find that the absolute flux calibration between XMM‐Newton and Chandra for Aql X‐1 is in good agreement with each other. The NS mass and radius of Aql X‐1 are obtained.