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/

Global: Zendy Tools annual

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

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

We present a new method for determining the location of active bands oflatitude on solar-type stars, which uses stellar-cycle-induced frequency shiftsof detectable solar-like oscillations. When near-surface activity isdistributed in a non-homogeneous manner, oscillation modes of different angulardegree and azimuthal order will have their frequencies shifted by differentamounts. We use this simple concept, coupled to a model for the spatialdistribution of the near-surface activity, to develop two methods that use thefrequency shifts to infer minimum and maximum latitudes for the active bands.Our methods respond to the range in latitude over which there is significantmagnetic flux present, over and above weak basal ephemeral flux levels. Weverify that we are able to draw accurate inferences in the solar case, usingSun-as-a-star helioseismic data and artificial data. We then apply our methodsto Kepler data on the solar analogue HD173701, and find that its active bandsstraddle a much wider range in latitude than do the bands on the Sun.

Asteroseismic constraints on active latitudes of solar-type stars: HD173701 has active bands at higher latitudes than the Sun