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2007

On the mass of the neutron star in V395 Car/2S 0921-630

Steeghs, D., Jonker, P. G.

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We report high-resolution optical spectroscopy of the low-mass X-ray binary V395 Car/2S 0921-630 obtained with the MIKE echelle spectrograph on the Magellan-Clay telescope.

Our spectra are obtained near superior conjunction of the mass donor star and we exploit the absorption lines originating from the back-side of the K-type object to accurately derive its rotational velocity.
Using K0-K1 III templates, we find vsini=32.9 +/- 0.8 km/s.
We show that the choice of template star and the assumed limb darkening coefficient has little impact on the derived rotational velocity.

On the mass of the neutron star in V395 Car/2S 0921-630 · Around

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