The nature of broadband quiescent emission in the neutron star Cen X-4

Details The nature of broadband quiescent emission in the neutron star Cen X-4 The nature of broadband quiescent emission in the neutron star Cen X-4

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008xmm..prop...93c&link_type=abstract

XMM-Newton Proposal ID #06035801

Computer Science

White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, Cen X-4

Scientific paper

Our understanding of broadband quiescent emission from neutron star LMXBs is incomplete. In the optical the donor star is present, and thermal emission from the neutron star is seen in X-rays. But, there is often a hard power-law tail in the X-ray spectrum whose origin is poorly understood. Moreover, UV emission during quiescence has generally been ignored, though a recessed accretion disk and possibly reprocessed X-rays may be important here. To investigate the broadband emission mechanisms present we propose to monitor the nearby neutron star LMXB, Cen X-4 with four, 12 ks observations to obtain photometry in 5 optical/UV filters in addition to high quality X-ray spectra. Studying the variability across this large range in wavelength will help complete our picture of quiescent emission.

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