Compact Hierarchical Triples
Compact Hierarchical Triples (CHT) are systems with the tertiary star orbiting the inner binary in an orbit shorter than 1000 days. This makes the dynamical effects to be distinct and the changes to be visible over few years. A complete characterization of such systems can help us understand the physics in these systems but very few systems have such an analysis.
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This work is funded by the National Science Center, Poland with the grant no. 2021/41/N/ST9/02746.
The figure shows CHT with precise measurements of masses and radii. The systems in red are the systems monitored in this project while the starred systems are the one which we discovered.
MOTIVATION & LITERATURE
WHY CHT?
These systems were thought to be rare before, but with Kepler and Transiting Exoplanet Survey Satellite (TESS) we have been discovering more of these systems. The dynamical effects of these systems can be monitored and constrained within few years of observations. A complete characterization of CHTs can help us understand the dynamics coupled evolution and also multiple-star formation at small scales (<5AU). For a detailed discussion check Borkovits (2022). I work on low-mass CHTs (atleast 2 companions are near 1 solar mass). They could also help us draw parallels to formation and evolution of brown-dwarfs and exoplanets.
OBSERVATIONS & TECHNIQUES
PUBLICATIONS
& FUTURE WORK
WHAT NEXT?
Out of 20 targets that are being spectroscopically monitored, 10 targets are being processed to extract all possible parameters. A set of independent measurement of stellar parameters can help us constrain models of multiple-star formation and evolution.