XMM-Newton observations of the isolated neutron star 1RXS J214303.7+065419/RBS1774

Authors: Cropper, Mark¹; Zane, Silvia²; Turolla, Roberto³; Zampieri, Luca⁴; Chieregato, Matteo⁵; Drake, Jeremy⁶; Treves, Aldo⁷

Source: Astrophysics and Space Science, Volume 308, Numbers 1-4, April 2007 , pp. 161-166(6)

Publisher: Springer

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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; 97.60.Jd

Document Type: Research article

DOI: http://dx.doi.org/10.1007/s10509-007-9377-z

Affiliations: 1: Email: msc@mssl.ucl.ac.uk 2: Email: sz@mssl.ucl.ac.uk 3: Email: turolla@pd.infn.it 4: Email: luca.zampieri@oapd.inaf.it 5: Email: matteo.chieregato@pd.infn.it 6: Email: jdrake@head-cfa.harvard.edu 7: Email: treves@mib.infn.it