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Published version

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2005-07-01

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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/150581

Orbital parameters of the microquasar LSI+61303

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https://doi.org/10.1111/j.1365-2966.2005.09106.x

Abstract

New optical spectroscopy of the HMXB microquasar LSI +61 303 is presented. Eccentric orbital fits to our radial velocity measurements yield updated orbital parameters in good agreement with previous work. Our orbital solution indicates that the periastron passage occurs at radio phase 0.23 and the X-ray/radio outbursts are triggered 2.5--4 days after the compact star passage. The spectrum of the optical star is consistent with a B0 V spectral type and contributes ~65 percent of the total light, the remaining due to emission by a circumstellar disc. We also measure the projected rotational velocity to be v sin i = 113 km/s.

Subject

Raigs X, Estels

Subject (English)

X-rays, Stars

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Articles publicats en revistes (Física Quàntica i Astrofísica)

Citation

CASARES, J., et al. Orbital parameters of the microquasar LSI+61303. Monthly Notices of the Royal Astronomical Society. 2005. Vol. 360, num. 3, pags. 1105-1109. ISSN 0035-8711. [consulted: 8 of August of 2026]. Available at: https://hdl.handle.net/2445/150581

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