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Article Dans Une Revue Astronomical Notes / Astronomische Nachrichten Année : 2020

Determining rotational and macroturbulent velocities of cool magnetic giant stars

Résumé

An original method of estimating the projected rotational velocity, vsini, and the macroturbulent velocity, vmac, of evolved M giant stars is presented. It is based on the use of spectrum synthesis and multiline analysis tools. The goal is to fit the mean line profile of observations with that of synthetic spectra. The method is applied to the red giant star RZ Ari, and the results vsini = 6.0 ± 0.5 km s−1 and vmac = 2.0 ± 1.0 km s−1 are obtained.

Dates et versions

hal-02953146 , version 1 (29-09-2020)

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Stefan Georgiev, Agnès Lèbre, Eric Josselin, Renada Konstantinova‐antova, Julien Morin. Determining rotational and macroturbulent velocities of cool magnetic giant stars. Astronomical Notes / Astronomische Nachrichten, 2020, 341 (5), pp.486-492. ⟨10.1002/asna.202013725⟩. ⟨hal-02953146⟩
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