Orbital parameters of the bright binary alpha Draconis based on amateur spectra from the STAROS database
Solar and Stellar Astrophysics
2025-11-24 v1
Abstract
We present the results of a STAROS monitoring campaign on the bright eclipsing binary star alpha Draconis. Over 200 high-resolution spectra were obtained by an international group of amateur astronomers. We were able to calculate an homogeneously covered radial velocity curve and redetermine the orbital elements of the alpha Draconis system. From the data set, we estimated the quality of our observations and accuracy of our radial velocity measurements. Finally, we have also implemented a spectral disentangling method to search for the signature of a companion star and used atmosphere models to constrain the atmospheric parameters of the system.
Keywords
Cite
@article{arxiv.2511.17206,
title = {Orbital parameters of the bright binary alpha Draconis based on amateur spectra from the STAROS database},
author = {G. Bertrand and C. Buil and M. Le Lain and V. Desnoux and O. Garde and E. Bertrand and A. Blais and JJ. Broussat and E. Bryssinck and L. Dalbin and X. Dupont and A. Garrigós and M. DiLazzaro and R. Leadbeater and V. Lecocq and J. Lecomte and A. Leduc and P. Louis and A. Maetz and L. Ribé de Pont and A. Stiewing and S. de Visscher and F. Weil},
journal= {arXiv preprint arXiv:2511.17206},
year = {2025}
}