Monitoring the spectral variability of the isolated neutron star RX J0720.4-3125

Details Monitoring the spectral variability of the isolated neutron star RX J0720.4-3125 Monitoring the spectral variability of the isolated neutron star RX J0720.4-3125

Oct 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005xmm..prop....6v&link_type=abstract

XMM-Newton Proposal ID #04001401

Physics

Supernovae, Supernova Remnants, Diffuse (Galactic) Emission And Isolated Neutron Stars, Rx J0720.4-3125, Xmm-Newton Proposal 04001401

Scientific paper

RX J0720.4-3125 belongs to a small group radio-quiet isolated neutron stars, whose X-ray spectra consist of a broad absorption feature superimposed on a blackbody continuum. However, it is unique in that it is the only source in which time evolution of the absorption feature and thermal component has been observed. The origin of the changes is still unclear, but their study is of great potential importance for revealing physical properties of isolated neutron stars. The spectral evolution may be caused by changes in the star's viewing angle, thermal and/or magnetic field distribution. To distinguish between these possibilities, we propose to continue monitoring RX J0720.4-3125. This will also help to further constrain the timing properties of this intriguing source.

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