Spitzer Near-IR Imaging of the Vela X-1 Bow Shock

Details Spitzer Near-IR Imaging of the Vela X-1 Bow Shock Spitzer Near-IR Imaging of the Vela X-1 Bow Shock

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.1910i&link_type=abstract

American Astronomical Society Meeting 210, #19.10; Bulletin of the American Astronomical Society, Vol. 39, p.121

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We present Spitzer IRAC imaging of the bow shock of the high mass X-ray binary Vela X-1. Vela X-1/HD77581 consists of a B0.5 Iab supergiant and a 283.33 s pulsar in a nearly-circular 8.96-day orbit. This is the only neutron star for which there is strong evidence that the mass of the neutron star is larger than 1.4 solar M. Vela X-1 left the OB-association, Vel OB1 2.5 million years, at which time the Supernova explosion of the binary companion occurred and the pulsar was formed.The presence of a bow shock indicates that the system has a high (supersonic) velocity with respect to the interstellar medium, in the process of which dust and gas is accumulated. Infrared emission from dust heated by the shocks will allow estimates of the energy input into the ISM as well as dust composition. Additional IRS observations are scheduled and will enable us to model the shock interaction.

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