English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

We demonstrate the power of the local correlation tracking technique on stellar data for the first time. We recover the spot migration pattern of the long‐period RS CVn‐type binary  σ  Gem from a set of six Doppler images from 3.6 consecutive rotation cycles. The resulting surface flow map suggests a weak anti‐solar differential rotation with  α  ≈ –0.0022 ± 0.0016, and a coherent poleward spot migration with an average velocity of 220 ± 10ms‐1. This result agrees with our recent findings from another study and could also be confirmed theoretically. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Surface velocity network with anti‐solar differential rotation on the activeK‐giant σ Geminorum