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

The TESS mission delivers time-series photometry for millions of stars acrossthe sky, offering a probe into stellar astrophysics, including rotation, on apopulation scale. However, light curve systematics related to the satellite's13.7-day orbit have prevented stellar rotation searches for periods longer than13 days, putting the majority of stars beyond reach. Machine learning methodshave the ability to identify systematics and recover robust signals, enablingus to recover rotation periods up to 35 days for GK dwarfs and 80 days for Mdwarfs. We present a catalog of 7245 rotation periods for cool dwarfs in theSouthern Continuous Viewing Zone, estimated using convolutional neuralnetworks. We find evidence for structure in the period distribution consistentwith prior Kepler and K2 results, including a gap in 10--20-day cool starperiods thought to arise from a change in stellar spin-down or activity. Usinga combination of spectroscopic and gyrochronologic constraints, we fit stellarevolution models to estimate masses and ages for stars with rotation periods.We find strong correlations between the detectability of rotation in TESS andthe effective temperature, age, and metallicity of the stars. Finally, weinvestigate the relationships between rotation and newly obtained spot fillingfractions estimated from APOGEE spectra. Field star spot filling fractions areelevated in the same temperature and period regime where open clusters'magnetic braking stalls, lending support to an internal shear mechanism thatcan produce both phenomena.

TESS Stellar Rotation up to 80 days in the Southern Continuous Viewing Zone