Then and now: A new look on the eclipse timing variations of hierarchical triple star candidates in the primordial Kepler-field, revisited by TESS
Abstract
A former analysis of eclipse timing variation (ETV) curves of eclipsing binaries (EB) observed by Kepler spacecraft during its ~4-yr-long prime mission has led to the discovery and characterization of 222 hierarchical triple star systems with different confidence levels. Although the prime Kepler-mission ended in 2013 (almost exactly ten years ago), the TESS space telescope revisited the original Kepler-field in the summers of 2019, 2021 and 2022, allowing to extend the time-base of high precision times of minima observations for a substantially longer interval. In this talk, I present our new analysis about the extended ETV curves of the formerly identified triple star candidates and many other Kepler EBs. Besides the confirmations of the former findings and/or the improvements of the triple systems' orbital properties, the extended time-base allowed us to identify several new, longer outer period triple systems on one side, and it made also possible a more detailed study of the dynamical perturbations in the tightest triple stars, on the other side.
- Publication:
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7th International Conference in Astronomy
- Pub Date:
- July 2023
- Bibcode:
- 2023aasp.confE..18B