Published July 27, 2021
| Version v1
Poster
Open
TOI-561 b: A 2500 K Earth-Size Planet with Non-Primordial Envelope in the Galactic Thick Disk
Contributors
Editors:
- 1. University of Notre Dame
- 2. University of Hawai'i Institute for Astronomy
Description
TOI-561 is a galactic thick disk star hosting an ultra-short period planet of 1.45 R⊕: one of the oldest known Earth-sized exoplanets (∼10 Gyr), and among the first discovered beyond the thin disk of our galaxy. As a thick disk star, TOI-561 is one of the most iron depleted (-0.41 dex) and alpha-enriched (0.23 dex) exoplanet hosts. To determine the composition of this planet, we collected high-precision Radial Velocity measurements and used equation-of-state modeling for iron and silicate rock. We have determined that the low density of TOI-561 b requires this planet to have a volatile envelope, despite its size and proximity to its host star.
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Additional details
References
- Lauren M. Weiss et al 2021 AJ 161 56
- G Lacedelli et al 2020 MNRAS 501 3
- Seifahrt, A., St ̈urmer, J., Bean, J. L., & Schwab, C. 2018, in Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series, Vol. 10702, Ground-based and Airborne Instrumentation for Astronomy VII, ed. C. J. Evans, L. Simard, & H. Takami, 107026D
- Cottaar, S., Heister, T., Myhill, R., Rose, I., & Unterborn, C. 2016, BurnMan: Lower mantle mineral physics toolkit, ascl:1610.010