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

A growing body of evidence suggests that multiple dynamo mechanisms can drivemagnetic variability on different timescales, not only in the Sun but also inother stars. Many solar activity proxies exhibit a quasi-biennial ($\sim$2year) variation, which is superimposed upon the dominant 11 year cycle. Awell-characterized stellar sample suggests at least two different relationshipsbetween rotation period and cycle period, with some stars exhibiting long andshort cycles simultaneously. Within this sample, the solar cycle periods aretypical of a more rapidly rotating star, implying that the Sun might be in atransitional state or that it has an unusual evolutionary history. In thiswork, we present new and archival observations of dual magnetic cycles in theyoung solar analog HD 30495, an $\sim$1 Gyr-old G1.5V star with a rotationperiod near 11 days. This star falls squarely on the relationships establishedby the broader stellar sample, with short-period variations at $\sim$1.7 yearsand a long cycle of $\sim$12 years. We measure three individual long-periodcycles and find durations ranging from 9.6-15.5 years. We find the short-termvariability to be intermittent, but present throughout the majority of the timeseries, though its occurrence and amplitude are uncorrelated with the longercycle. These essentially solar-like variations occur in a Sun-like star withmore rapid rotation, though surface differential rotation measurements leaveopen the possibility of a solar equivalence.

Sun-Like Magnetic Cycles in the Rapidly-Rotating Young Solar Analog HD 30495