Video/Audio Open Access
Montet, Benjamin;
Ness, Melissa
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.
Name | Size | |
---|---|---|
Montet_CS20half_Poster.pdf
md5:ba8b62ee007c5d15aea467683833412b |
5.0 MB | Download |
Montet_haiku.mov
md5:262991574d66854f58bf5da133ad301f |
126.7 MB | Download |
Montet_thumbnail.png
md5:c3102a531eb432507fa8fa691a168a94 |
272.0 kB | Download |
All versions | This version | |
---|---|---|
Views | 46 | 46 |
Downloads | 54 | 54 |
Data volume | 509.6 MB | 509.6 MB |
Unique views | 44 | 44 |
Unique downloads | 46 | 46 |