A new 60 millisecond X-ray pulsar and its massive early-type companion

Details A new 60 millisecond X-ray pulsar and its massive early-type companion A new 60 millisecond X-ray pulsar and its massive early-type companion

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...338..338c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 338, March 1, 1989, p. 338-342. Research supported by CNR.

Astronomy and Astrophysics

Astrophysics

15

Astronomical Spectroscopy, Companion Stars, Early Stars, Pulsars, X Ray Binaries, Absorption Spectra, Heao 2, Light Curve, Stellar Winds, Visible Spectrum

Scientific paper

Einstein Observatory IPC and HRI observations of a serendipitous, variable, X-ray source in the galactic plane in Carina are presented. Timing analysis shows the source to have a periodicity P about 60 ms. The optical identification with the 12.7 mag Wack 2134 star, suggested by the positional coincidence, is confirmed by spectroscopic observations done at ESO La Silla. The star appears to be probably of O5 type. The X-ray and optical data suggest the discovery of a new binary system where a hot massive star loses mass to a spinning neutron star, which would then be the fastest X-ray binary pulsar to date.

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