2019
DOI: 10.1051/0004-6361/201834630
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Barium and related stars, and their white-dwarf companions

Abstract: Context. Barium and S stars without technetium are red giants suspected of being all members of binary systems. Aims. This paper provides both long-term and revised, more accurate orbits for barium and S stars adding to previously published ones. The sample of barium stars with strong anomalies comprise all such stars present in the Lü et al. catalogue. Methods. Orbital elements are derived from radial velocities collected from a long-term radial-velocity monitoring performed with the HERMES spectrograph mount… Show more

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Cited by 74 publications
(198 citation statements)
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References 83 publications
(127 reference statements)
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“…We note that the atmospheric parameters of o 1 Ori quoted inJorissen et al (2019) are different than the ones used in this study. This is because log g iterations were not performed inJorissen et al (2019).…”
mentioning
confidence: 67%
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“…We note that the atmospheric parameters of o 1 Ori quoted inJorissen et al (2019) are different than the ones used in this study. This is because log g iterations were not performed inJorissen et al (2019).…”
mentioning
confidence: 67%
“…A tentative period of 575 d and a mass function of (2.7 ± 0.2) × 10 −5 M was obtained by Jorissen et al (2019), suggestive of an orbit seen almost pole-on (i = 4.7 • ± 1 • ). BD+79 • 156 is a confirmed binary with an orbital period of 10931 days, an eccentricity of 0.461, and a mass function of 0.025 M , compatible with a WD companion (Van der Swaelmen et al 2017;Jorissen et al 2019). An additional confirmation of the presence of a WD companion around BD+79 • 156 (and o 1 Ori) comes from the UV excess seen in their spectral energy distribution (SED), well visible when comparing photometric observations with model SED (Fig.…”
Section: Binaritymentioning
confidence: 91%
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