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 Plus annual

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

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We investigate the variation of the gravitational constant $G$ over thehistory of the Universe by modeling the effects on the evolution andasteroseismology of the low-mass star KIC 7970740, which is one of the oldest(~11 Gyr) and best-observed solar-like oscillators in the Galaxy. From thesedata we find $\dot{G}/G = (1.2 \pm 2.6) \times 10^{-12}~\text{yr}^{-1}$, thatis, no evidence for any variation in $G$. We also find a Bayesian asteroseismicestimate of the age of the Universe as well as astrophysical S-factors for fivenuclear reactions obtained through a 12-dimensional stellar evolution Markovchain Monte Carlo simulation.

Asteroseismic constraints on the cosmic-time variation of the gravitational constant from an ancient main-sequence star