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The magnetic field of the double-lined spectroscopic binary system HD 5550 by Alecian, E.; Tkachenko, A.; Neiner, C.; Folsom, C. P.; Leroy, B.; collaboration, the BinaMIcS is a scholarly article available to read on EtoBox.

What is The magnetic field of the double-lined spectroscopic binary system HD 5550 about?

(Abridged) In the framework of the BinaMicS project, we have begun a study of the magnetic properties of a sample of intermediate-mass and massive short-period binary systems, as a function of binarity properties. We report in this paper the characterisation of the magnetic field of HD 5550, a double-lined spectroscopic binary system of intermediate-mass, using high-resolution spectropolarimetric Narval observations of HD 5550. We first fit the intensity spectra using Zeeman/ATLAS9 LTE synthetic spectra to estimate the effective temperatures, microturbulent velocities, and the abundances of some elements of both components, as well as the light-ratio of the system. We then fit the least-square deconvolved $I$ profiles to determine the radial and projected rotational velocities of both stars. We then analysed the shape and evolution of the LSD $V$ profiles using the oblique rotator model to characterise the magnetic fields of both stars. We confirm the Ap nature of the primary, previously reported in the literature, and find that the secondary displays spectral characteristics typical of an Am star. While a magnetic field is clearly detected in the lines of the primary, no magnetic

Author

Alecian, E.; Tkachenko, A.; Neiner, C.; Folsom, C. P.; Leroy, B.; collaboration, the BinaMIcS

Published

2016

Language

EN