Video/Audio Open Access
Rapidly Rotating Lithium-Rich Giants Observed by Kepler
Montet, Benjamin;
Ness, Melissa
Editor(s)
Wolk, ScottSeveral 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.
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Montet_CS20half_Poster.pdf
md5:ba8b62ee007c5d15aea467683833412b |
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Montet_haiku.mov
md5:262991574d66854f58bf5da133ad301f |
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Montet_thumbnail.png
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| Data volume | 514.9 MB | 514.9 MB |
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- Publication date:
- February 26, 2021
- DOI:
-
- Keyword(s):
- Post main sequence cool stars
- Meeting:
- The 20.5th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun (CS20.5), virtually anywhere, March 2-4, 2021
- Communities:
- License (for files):
- Creative Commons Attribution 4.0 International