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Long-term stability of spotted regions and the activity-induced Rossiter-McLaughlin effect on V889 Herculis-A synergy of photometry, radial velocity measurements, and Doppler imaging

Authors
  • K F, Huber
  • U, Wolter
  • S, Czesla
  • Jhmm, Schmitt
  • M, Esposito
  • I, Ilyin
  • J N, González-Pérez
Type
Published Article
Journal
ScienceOpen Astronomy & Astrophysics
Publisher
ScienceOpen
Publication Date
Jun 30, 2009
Volume
501
Issue
2
Pages
715–728
Source
SETI Institute
License
Unknown

Abstract

Context. The young active G-dwarf star V889 Herculis (HD 171488) shows pronounced spots in Doppler images as well as large variations in photometry and radial velocity (RV) measurements. However, the lifetime and evolution of its active regions are not well known. Aims. We study the existence and stability of active regions on the star s surface using complementary data and methods. Furthermore, we analyze the correlation of spot- induced RV variations and Doppler images. Methods. Photometry and high-resolution ...

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