J. Lipták, M. Skarka, E. Guenther, P. Chaturvedi, M. V'itkov'a, R. Karjalainen, J. Šubjak, A. Hatzes, A. Bieryla, D. Gandolfi, S. H. Albrecht, P. G. Beck, H. Deeg, M. Everett, J. Higuera, D. Jones, S. Mathur, Y. G. Patel, C. Persson, S. Redfield, P. Kabáth
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引用次数: 0
Abstract
Precise space-based photometry from the Transiting Exoplanet Survey Satellite results in a huge number of exoplanetary candidates. However, the masses of these objects are unknown and must be determined by ground-based spectroscopic follow-up observations, frequently revealing the companions to be low-mass stars rather than exoplanets. We present the first orbital and stellar parameter solutions for five such eclipsing binary-star systems using radial-velocity follow-up measurements together with spectral-energy-distribution solutions. TOI-416 and TOI-1143 are totally eclipsing F+M star systems with well-determined secondary masses, radii, and temperatures. TOI-416 is a circular system with an F6 primary and a secondary with a mass of $M_2= M_ odot $. TOI-1143 consists of an F6 primary with an $M_2= M_ odot $ secondary on an eccentric orbit with a third companion. With respect to the other systems, TOI-1153 shows ellipsoidal variations, TOI-1615 contains a pulsating primary, and TOI-1788 has a spotted primary, while all have moderate mass ratios of 0.2-0.4. However, these systems are in a grazing configuration, which limits their full description. The parameters of TOI-416B and TOI-1143B are suitable for the calibration of the radius-mass relation for dwarf stars.
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