تقرير
Five new eclipsing binaries with low-mass companions
| العنوان: | Five new eclipsing binaries with low-mass companions |
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| المؤلفون: | Lipták, J., Skarka, M., Guenther, E., Chaturvedi, P., Vítková, M., Karjalainen, R., Šubjak, J., Hatzes, A., Bieryla, A., Gandolfi, D., Albrecht, S. H., Beck, P. G., Deeg, H. J., Everett, M. E., Higuera, J., Jones, D., Mathur, S., Patel, Y. G., Persson, C. M., Redfield, S., Kabáth, P. |
| سنة النشر: | 2024 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Solar and Stellar Astrophysics, Astrophysics - Earth and Planetary Astrophysics |
| الوصف: | 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 $M_2={0.131(8)}{M_\odot}$. TOI-1143 consists of an F6 primary with an $M_2={0.142(3)}{M_\odot}$ 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. Comment: A&A accepted on 06/06/2024 |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1051/0004-6361/202450038 |
| URL الوصول: | http://arxiv.org/abs/2408.06897 |
| رقم الأكسشن: | edsarx.2408.06897 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1051/0004-6361/202450038 |
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