TOI-849 b
TOI-849 b is a chthonian planet orbiting the M-dwarf star TOI-849.
| Discovery | |
|---|---|
| Discovered by | TESS |
| Discovery date | 2020 |
| Transit | |
| Orbital characteristics | |
| 0.01598 AU | |
| Eccentricity | 0 |
| 0.8 d | |
| Star | TOI-849 |
| Physical characteristics | |
Mean radius | 0.307 RJ |
| Mass | 39.09 M🜨 |
Characteristics
It is a high-density planet more massive than Neptune and was found very close to its host star, within the Neptunian desert, so it may well be classified as a chthonian planet.[1] [2]
Compared to other exoplanets that orbit very close to their stars, this planet is quite unusual because it is 40 times the mass of Earth but only about three times as big around. The gravity of such massive worlds should attract large amounts of gas from the disk of material out of which planets form. And planets with similarly large masses are five to 10 times as wide as Earth. But TOI-849 b is a lot less puffy than that, leading scientists to conclude that it lacks a substantial atmosphere.
References
- Armstrong DJ, Lopez TA, Zhan Z (June 1, 2020). "A remnant planetary core in the hot-Neptune desert". Nature. 583 (7814): 39–42. arXiv:2003.10314. Bibcode:2020Natur.583...39A. doi:10.1038/s41586-020-2421-7. PMID 32612222. S2CID 214612138.
- "The Extrasolar Planet Encyclopaedia — TOI-849 b". exoplanet.eu. Retrieved 11 September 2023.
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