Relativistic Iron Line from the Neutron Star LMXB Serpens X-1

Details Relativistic Iron Line from the Neutron Star LMXB Serpens X-1 Relativistic Iron Line from the Neutron Star LMXB Serpens X-1

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007xmm..prop....8b&link_type=abstract

XMM-Newton Proposal ID #05502401

Physics

White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, Serpens X-1, Xmm-Newton Proposal Id #05502401

Scientific paper

We propose to observe the bright persistent neutron star low-mass X-ray binary (LMXB) Serpens X-1 for 80 ks. Previous XMM data have confirmed a broad relativistic iron line from this source, which is the first evidence for such a line from a neutron star LMXB. Our proposed observation will measure the line-shape with unprecedented precision, and will address the following important science: (1) constraining the neutron star radius (crucial to understanding the state of matter in the super-dense core), and (2) the plausible first detection of the effect of neutron star spin on the accretion disk, and a direct measurement of the stellar angular momentum. These science goals rely on the unique qualities of XMM (e.g., large detector area, and good spectral resolution with minimal pile-up).

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