Confirmation of a new Isolated Neutron Star in the ROSAT All Sky Survey

Details Confirmation of a new Isolated Neutron Star in the ROSAT All Sky Survey Confirmation of a new Isolated Neutron Star in the ROSAT All Sky Survey

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006cxo..prop.2297r&link_type=abstract

Chandra Proposal ID #08508263

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Chandra Proposal Id #08508263

Scientific paper

The 7 known X-ray dim isolated neutron stars (INSs) were all discovered from the ROSAT all-sky survey between 1995 and 1999. We may have discovered an important one: the first INS in the halo. 1RXS J1412+7922 is important because: (1) its blackbody spectrum is hotter than any known INS (235+/-45 eV; compared with 118+/-13 for the next hottest); (2) its low flux (0.05 PSPC c/s) and high temperature make it the most distant known INS (8.2 kpc, compared with 2.3 kpc for RX J0806-4123; the remaining six are <1 kpc); and (3) its high galactic latitude gives it a galactocentric position (R_c=13.4, z=4.9 kpc) in the galactic halo. J1412 cannot be powered by accretion (no ISM in the halo); if cooling, it must be <1e6 yr old, giving a velocity of >4900 km/sec (from the Galactic plane), the highest ever observed. Otherwise, a cooling time of >1e7 yrs is required, the longest ever observed.

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