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 Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We quantify the effect of observational spectroscopic and asteroseismicuncertainties on regularised least squares (RLS) inversions for the radialdifferential rotation of Sun-like and subgiant stars. We first solved theforward problem to model rotational splittings plus the observed uncertaintiesfor models of a Sun-like star, HD 52265, and a subgiant star, KIC 7341231. Werandomly perturbed the parameters of the stellar models within theuncertainties of the spectroscopic and asteroseismic constraints and used theseperturbed stellar models to compute rotational splittings. We experimented withthree rotation profiles: solid body rotation, a step function, and a smoothrotation profile decreasing with radius. We then solved the inverse problem toinfer the radial differential rotation profile using a RLS inversion andkernels from the best-fit stellar model.We found that the inversions forSun-like stars with solar-like radial differential rotation profiles areinsensitive to the uncertainties in the stellar models. We found that when therotation rate below the convection zone is increased to six times that of thesurface rotation rate the inferred rotation profile excluded solid bodyrotation. With the current observational uncertainties, we found thatinversions of subgiant stars are sensitive to the uncertainties in the stellarmodel. Our findings suggest that inversions for the radial differentialrotation of subgiant stars would benefit from more tightly constrained stellarmodels. In Sun-like stars, the insensitivity of the inversions to stellar modeluncertainties suggests that it may be possible to perform ensemble inversionsfor the average radial differential rotation of many stars with a range ofstellar types to better constrain the inversions.

Asteroseismic inversions for radial differential rotation of Sun-like stars: Sensitivity to uncertainties