TESS photometry of crème de la crème of Eclipsing Binaries

TESS photometry of crème de la crème of Eclipsing Binaries

Krzysztof G. Hełminiak, Frédéric Marcadon, Ayush Moharana, Tilaksingh Pawar and Maciej Konacki

Since 2011 we have been conducting an extensive spectroscopic survey of detached eclipsing binaries (DEBs), and obtaining precise radial velocity (RV) data for hundreds of them. The main goal was to identify and properly characterise new cases of poorly-studied or astrophysically interesting stars (e.g. low mass dwarfs, PMS, giants, pulsators, multiples, etc.). For most of them, we also gathered 2-minute cadence time series photometry from the TESS satellite through Guest Investigator programmes. Thanks to the superb data sets we are able to derive the values of fundamental stellar parameters (e.g. absolute masses, radii, temperatures) with a very high relative precision of 0.2-2%. To date we have identified for example DEBs ∼80 with low-mass stars, 15 with (sub)giants, ∼10 with pulsators of various kinds, ∼90 multiples, or 5 with pre-main sequence components, as well as a number of systems with other interesting properties.

Proceedings of the Polish Astronomical Society, vol. 12, 163-168 (2022)

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