Orbital parameters of the high-mass X-ray binary 4U 2206+54

Abstract

We present new radial velocities of the high-mass X-ray binary star 4U 2206+54 based on optical spectra obtained with the Coude spectrograph at the 2m RCC telescope at the Rozhen National Astronomical Observatory, Bulgaria in the period November 2011 -- July 2013. The radial velocity curve of the HeI $\lambda$6678 Å line is modeled with an orbital period P${}_{orb}$ = 9.568~d and an eccentricity of $e$ = 0.3. These new measurements of the radial velocity resolve the disagreements of the orbital period discussions.

4 pages, 4 figures. Accepted for publication in Astronomische Nachrichten

References in corpus (3)

• Swift/BAT and RXTE Observations of the Peculiar X-ray Binary 4U 2206+54 - Disappearance of the 9.6 Day Modulation
• Discovery of slow X-ray pulsations in the high-mass X-ray binary 4U 2206+54
• Long-term pulse profile study of the Be/X-ray pulsar SAX J2103.5+4545

Cited by in corpus (1)

• The stellar and wind parameters of six prototypical HMXBs and their evolutionary status