Doppler imaging of the double-lined active binary V824 Ara

García-Alvarez, D.; Kővári, Zs.; Vida, K.; Kriskovics , L.; Oláh, K.
Bibliographical reference

Astronomische Nachrichten, Vol.334, Issue 9, p.976

Advertised on:
11
2013
Number of authors
5
IAC number of authors
1
Citations
3
Refereed citations
3
Description
We introduce an iterative spectral disentangling technique combined with Doppler imaging in order to recover surface temperature maps for both components of double-lined active binary systems. Our method provides an opportunity to separate spectra of the active components while minimizing the unwanted disturbances on the given line profile from the other component. The efficiency of the method is demonstrated on real data of the double-lined RS CVn-type binary V824 Ara. The resulting Doppler images reveal cool spots on the polar regions as well as low-latitude features on both of the stars. Moreover, both components have hot spots, that are facing each other. This may indicate interconnection between the stellar magnetic fields.
Related projects
spectrum of mercury lamp
Chemical Abundances in Stars
Stellar spectroscopy allows us to determine the properties and chemical compositions of stars. From this information for stars of different ages in the Milky Way, it is possible to reconstruct the chemical evolution of the Galaxy, as well as the origin of the elements heavier than boron, created mainly in stellar interiors. It is also possible to
Carlos
Allende Prieto