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http://hdl.handle.net/20.500.12386/24441
Titolo: | NuSTAR and XMM-Newton Observations of the Neutron Star X-Ray Binary 1RXS J180408.9-34205 | Autori: | Ludlam, R. M. Miller, J. M. Cackett, E. M. Fabian, A. C. BACHETTI, Matteo Parker, M. L. Tomsick, J. A. Barret, D. NATALUCCI, LORENZO Rana, V. Harrison, F. A. |
Data pubblicazione: | 2016 | Rivista: | THE ASTROPHYSICAL JOURNAL | Numero: | 824 | Fascicolo: | 1 | Da pagina:: | 37 | Abstract: | We report on observations of the neutron star (NS) residing in the low-mass X-ray binary 1RXS J180408.9-34205 taken 2015 March by NuSTAR and XMM-Newton while the source was in the hard spectral state. We find multiple reflection features (Fe {{{K}}}<SUB>α </SUB> detected with NuSTAR; N vii, O vii, and O viii detected in the RGS) from different ionization zones. Through joint fits using the self-consistent relativistic reflection model relxill, we determine the inner radius to be ≤11.1 R <SUB> g </SUB>. For a 1.4 {M}<SUB>☉ </SUB> NS with a spin of {a}<SUB>\ast </SUB>=0, this is an inner disk radius of ≤slant 22.2 km. We find the inclination of the system to be between 18° and 29°. If the disk is truncated at a radius greater than the NS radius, it could be truncated by a boundary layer on the NS surface. It is also possible that the disk is truncated at the magnetospheric radius; conservative estimates would then imply B≤slant (0.3{--}1.0)× {10}<SUP>9</SUP> G at the magnetic poles, though coherent pulsations have not been detected and the source is not identified as a pulsar. | URI: | http://hdl.handle.net/20.500.12386/24441 | URL: | https://iopscience.iop.org/article/10.3847/0004-637X/824/1/37/meta | ISSN: | 0004-637X | DOI: | 10.3847/0004-637X/824/1/37 | Bibcode ADS: | 2016ApJ...824...37L | Fulltext: | open |
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