ADEBBDs: Accelerating Detached Eclipsing Binaries with Brown Dwarfs
Authors/Creators
-
1.
Nicolaus Copernicus Astronomical Center
- 2. Astronomical Observatory of the University of Warsaw
-
3.
University of California San Diego
-
4.
University of Zielona Góra
-
5.
The University of Texas at San Antonio
- 6. Subaru Telescope
-
7.
California Institute of Technology
Description
We observe a sample of well-studied detached eclipsing binaries (DEBs), that also show Proper Motion Anomaly (a.k.a. acceleration; PMA). The goal is to identify the low-mass companions that cause the PMA. We focus on systems, whose predicted companion mass suggests a brown dwarf (BD), and whose age is older than 0.9 Gyr i.e. more than for a typical open cluster. By combining direct imaging observations with other available data (radial velocities, distance, astrometry, chemical composition) we are able to characterize their BD companions, including their dynamical mass, effective temperature, or luminosity with high precision, that
would otherwise be unattainable for such objects at an "old" age.
These BDs will be benchmarks for evolutionary models of cool and ultracool dwarfs beyond 1 Gyr.
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ADEBBDs_na_CS23.pdf
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Additional details
Funding
- National Science Centre
- 2023/49/B/ST9/01671
Dates
- Submitted
-
2026-06-07
References
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