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XMM-Newton observations of the isolated neutron star 1RXS J214303.7+065419/RBS1774 |
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| Authors: | Mark Cropper Silvia Zane Roberto Turolla Luca Zampieri Matteo Chieregato Jeremy Drake Aldo Treves |
| Institution: | (1) Mullard Space Science Laboratory, University College London, Holmbury St Mary, Dorking, Surrey, RH5 6NT, UK;(2) Department of Physics, University of Padova, Via Marzolo 8, I-35131 Padua, Italy;(3) INAF-Osservatorio Astronomico di Padova, Vicolo dellOsservatorio 5, I-35122 Padua, Italy;(4) Department of Physics and Mathematics, Universita dellInsubria, Via Valleggio 11, I-22100 Como, Italy;(5) 6 Smithsonian Astrophysical Observatory, Mail Stop 3, 60 Garden Street, Cambridge, MA 02138, USA |
| Abstract: | We report XMM-Newton observations of the isolated neutron star RBS1774 and confirm its membership as an XDINS. The X-ray spectrum is best fit with an absorbed blackbody with temperature kT=101 eV and absorption edge at 0.7 keV. No power law component is required. An absorption feature in the RGS data at 0.4 keV is not evident in the EPIC data, but it is not possible to resolve this inconsistency. The star is not seen in the UV OM data to m AB ∼21. There is a sinusoidal variation in the X-ray flux at a period of 9.437 s with an amplitude of 4%. The age as determined from cooling and magnetic field decay arguments is 105–106 yr for a neutron star mass of 1.35–1.5 M⊙. |
| Keywords: | Stars: individual (1RXS J214303 7+065419 RBS1774) Stars: neutron X-rays: stars |
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