| Autor: |
Rabus, Markus, Carmichael, Theron W., Shporer, Avi, Johnson, Marshall, Latham, David W., Brown, Tim, Gan, Tianjun, Collins, Karen A., Barkaoui, Khalid, Bieryla, Allyson, Kielkopf, John F., Gonzalez, Erica J., Addison, Brett C., Henriksen, Andreea I., Buchhave, Lars, Rasmussen, René Tronsgaard, Astudillo-Defru, Nicola, Fulton, Benjamin, Howell, Steve B., Ciardi, David, Hellier, Coel, Ghachoui, Mourad, Timmermans, Mathilde |
| Rok vydání: |
2021 |
| Předmět: |
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| DOI: |
10.5281/zenodo.5131540 |
| Popis: |
We describe in the underlying investigation the discovery of two eclipsing binary systems. In both cases, the companions are most likely fully convective low-mass stars. The TESS team initially alerted the systems as TOI-1830 (TIC20182165, HD133725) and TOI-1312 (TIC405904232), and we subsequently observed them with spectroscopy. The TESS light curves and spectroscopic observations were analyzed in a combined data-driven framework to estimate the systems’ parameters. Radial velocity (RV) measurements with LCO/NRES, NOT/FIES, SONG, and TRES indicated for the TOI-1830 system a companion mass of 0.11 M☉ in a 9.781-day eccentric orbit and a 0.10 M☉ companion in an 11.080-day eccentric orbit for the TOI-1312 system. At the same time, the spectroscopic observations were used to estimate the spectral type of the main stars for TOI-1830 and TOI-1312. We measured the radii ratio from the TESS light curves and estimated the companions’ radii, assuming the main stars’ radii as measured from spectroscopy and isochrones. Given the youth of TOI-1830 and the evolved age of TOI-1312, both systems will provide valuable insights into the stellar evolution of close binary systems. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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