Wolk, Scott
Montet, Benjamin
Ness, Melissa
2021-02-26
<p>Several mechanisms to produce lithium-rich red giants have been proposed, including interactions between the red giant and a binary companions as the star reaches the tip of the red giant branch. One consequence of this model would be tidal spin-up of the red giant to the few km/s level. This level of rotation could in principle be detected in photometry from missions like Kepler and TESS, but signals longer than ~50 days are typically overwhelmed by instrumental systematics and removed by the processing pipeline. Here, we describe our data-driven reanalysis of Kepler pixel-level data that more accurately preserves slower signals in the data and our measurements of rotation periods of the lithium-rich giants in the Kepler field compared to lithium-normal giants and the implications for the formation of lithium-rich giants, as well as the potential to apply this method to other cool stars with 100-day or longer rotation periods.</p>
https://doi.org/10.5281/zenodo.4564094
oai:zenodo.org:4564094
eng
Zenodo
https://zenodo.org/communities/coolstars20half
https://doi.org/10.5281/zenodo.4564093
info:eu-repo/semantics/openAccess
Creative Commons Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/legalcode
CS20.5, The 20.5th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun, virtually anywhere, March 2-4, 2021
Post main sequence cool stars
Rapidly Rotating Lithium-Rich Giants Observed by Kepler
info:eu-repo/semantics/other