X-ray emission from the double neutron star binary J1537+1155: Powered by the pulsar wind?

Details X-ray emission from the double neutron star binary J1537+1155: Powered by the pulsar wind? X-ray emission from the double neutron star binary J1537+1155: Powered by the pulsar wind?

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008cxo..prop.2602k&link_type=abstract

Chandra proposal ID #10500606

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Scientific paper

We have discovered X-ray emission from the double neutron binary (DNSB) J1537+1155 in a 37 ks observation with Chandra. We found that the spectrum and the luminosity of J1537 are very similar to those of the famous double pulsar binary J0737-3039 (the only other DNSB detected in X-rays). However, unlike J0737, in J1537, whose orbit is more eccentric, we found evidence for variability with orbital phase, at a 3 sigma level. If confirmed, such variability proves that a substantial fraction of X-ray emission in DNSB can be produced via the interaction between the pulsar wind and the companion NS. We propose a follow-up 38 ks (one binary orbit) observation to verify the putative variability and test various models for X-ray emission of DNSBs.

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