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Constraints of the compactness of the isolated neutron stars via -ray phase-resolved spectroscopy. Valeri Hambaryan 1 , Valery Suleimanov 2 , Ralph Neuhäuser 1 & Klaus Werner 2. 1 Astrophysical Institut , University of Jena, Germany - PowerPoint PPT Presentation
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Constraints of the compactness of the isolated neutron stars via -ray phase-resolved spectroscopy
Valeri Hambaryan 1, Valery Suleimanov 2, Ralph Neuhäuser 1 & Klaus Werner 2
1Astrophysical Institut , University of Jena, Germany2Institut for Astronomy & Astrophyscs , University of Tuebingen, Germany
Thermally emitting isolated neutron stars P-P_dot diagram Distribution in Galaxy
1Astrophysical Institut , University of Jena, Germany RBS 1223=1RXS J130848.6+212708• High galactic latitude: l=338.7457 b=+83.0813• Highest pulsed fraction among M7: Double humped light curve Strongest broad absorption feature
]keV0.22.0[%18minmax
minmax FFFFPF
EW = 150 eVE line = 300 eV
Observational data: Spectrum vs LC
Fe cyclotron energy
EC
Condensed Fe surface spectra approximations
Partially ionized H atmospheres above condenced Fe surfaces
Model: