Searching for Millisecond Pulsars in Extremely Low-Mass White Dwarf Binaries

Details Searching for Millisecond Pulsars in Extremely Low-Mass White Dwarf Binaries Searching for Millisecond Pulsars in Extremely Low-Mass White Dwarf Binaries

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007xmm..prop..103h&link_type=abstract

XMM-Newton Proposal ID #05534407

Computer Science

White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, Sdss J091709+46, Lp 400-22, Sdss J105353+52, Sdss J123410-02, Sdss J143633+50, Sdss J092345+30, Sdss J143948+10, Xmm-Newton Proposal Id #05534407

Scientific paper

Several extremely low-mass white dwarfs, with masses below 0.24 solar masses, have recently been discovered in large surveys. These white dwarfs cannot be formed through the evolution of single stars, and several are known as companions of millisecond radio pulsars. We propose a search for X-ray emission from seven relatively bright extremely low-mass white dwarfs to distinguish between neutron star vs. white dwarf companions. New millisecond pulsars with companions amenable to spectroscopy are of great interest, while ruling out neutron star companions will put constraints on common envelope models for double white dwarf evolution.

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