Doppler imaging of the double-lined active binary V824 Ara

L. Kriskovics, K. Vida, Z. Kővári, D. Garcia-Alvarez, K. Oláh

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)976-979
Number of pages4
JournalAstronomische Nachrichten
Volume334
Issue number9
DOIs
Publication statusPublished - Nov 2013

Fingerprint

polar region
surface temperature
stellar magnetic fields
magnetic field
disturbance
tropical regions
polar regions
disturbances
stars
method
profiles

Keywords

  • Binaries: spectroscopic
  • Stars: activity
  • Stars: individual: (V824 Ara)
  • Stars: late-type
  • Starspots
  • Techniques: spectroscopic

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Doppler imaging of the double-lined active binary V824 Ara. / Kriskovics, L.; Vida, K.; Kővári, Z.; Garcia-Alvarez, D.; Oláh, K.

In: Astronomische Nachrichten, Vol. 334, No. 9, 11.2013, p. 976-979.

Research output: Contribution to journalArticle

Kriskovics, L. ; Vida, K. ; Kővári, Z. ; Garcia-Alvarez, D. ; Oláh, K. / Doppler imaging of the double-lined active binary V824 Ara. In: Astronomische Nachrichten. 2013 ; Vol. 334, No. 9. pp. 976-979.
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