Astronomy:TOI-715 b
| Discovery | |
|---|---|
| Discovered by | Dransfield et al. |
| Discovery site | TESS |
| Discovery date | May 10, 2023 |
| transit | |
| Orbital characteristics | |
| 0.083±0.0027 astronomical unit|AU | |
| Inclination | 89.856°+0.018° −0.017° |
| Star | TOI-715 |
| Physical characteristics | |
| Mean radius | 1.55±0.064 R🜨 |
| Physics | 234±12 K (−39±12 °C) |
TOI-715 b is a super-Earth exoplanet in the habitable zone of its parent M-type star, TOI-715.[1][2][3] The planet is 1.55 times larger than Earth, and is located at 0.083 Astronomy:astronomical unit|astronomical units (12,400,000 km) from its star.[4] The planet orbits in the habitable zone of its star and has an equilibrium temperature of 234 K (−39 °C).[4] It was discovered by the Transiting Exoplanet Survey Satellite (TESS) in 2023;[5] according to the authors of the discovery paper, it is the first TESS discovery in the conservative habitable zone.[4]
NASA stated that the James Webb Space Telescope may be used in the future to look for evidence of water or planetary atmosphere.[6] Additionally, there may be a second exoplanet in the same system, TIC 271971130.02, that, if confirmed, would be the smallest known habitable-zone exoplanet.[6]
Conservative habitable zone
The concept of "conservative habitable zone" was defined by Koparappu et al. in 2014. It is the region where the planet receives insolation equivalent to 0.42 to 0.842 times the insolation received from Earth by the Sun.[7] As TOI-715 b has a insolation of 0.67+0.15
−0.20 S🜨, it is located inside the conservative habitable zone.[4]
TOI-715
TOI-715 is a red dwarf star located 42 parsecs (140 ly) from the Earth in the constellation Volans,[note 1] very close to the southern celestial pole.[4] The star is smaller and cooler than the Sun and has an apparent magnitude of 16.7 and is too faint to be seen with the naked eye or even a small telescope.[9]
Further reading
- Jain, Vrinda (February 5, 2024). "NASA discovers potentially habitable 'super-Earth' 137 Light-Years Away". Hindustan Times. https://www.hindustantimes.com/trending/nasa-discovers-potentially-habitable-super-earth-137-light-years-away-101707108812253.html.
- Sarnoff, Leah (February 5, 2024). "NASA announces new 'super-Earth': Exoplanet orbits in 'habitable zone,' is only 137 light-years away". ABC News. https://abcnews.go.com/US/nasa-super-earth-habitable-zone-exoplanet/story?id=106961506.
- Schwenck, Lennart (February 6, 2024). "Auf der Suche nach Leben: Forscher entdecken Super-Erde in bewohnbarer Zone" (in German). Münchner Merkur (Munich). https://www.merkur.de/wissen/der-suche-nach-leben-forscher-entdecken-super-erde-bewohnbare-zone-weltall-auf-92808935.html.
- Messier, Ashlyn (February 7, 2024). "NASA announces potentially habitable 'super-Earth,' only 137 light-years away". Fox News. https://www.foxnews.com/lifestyle/nasa-announces-potentially-habitable-super-earth-137-light-years-away.
Notes
References
- ↑ "TOI-715 b". NASA. https://exoplanets.nasa.gov/exoplanet-catalog/8921/toi-715-b/.
- ↑ Ralls, Eric (February 4, 2024). "Super-Earth discovered in the "optimal" habitable zone of its star, TOI-715 b". https://www.earth.com/news/super-earth-discovered-in-the-habitable-zone-of-its-star/.
- ↑ "NASA discovers 'Super-Earth' 189 light-years away". The Economic Times. February 4, 2024. https://economictimes.indiatimes.com/news/science/nasa-discovers-super-earth-137-light-years-away/articleshow/107404790.cms.
- ↑ 4.0 4.1 4.2 4.3 4.4 Dransfield, Georgina et al. (2023-10-28). "A 1.55 R⊕ habitable-zone planet hosted by TOI-715, an M4 star near the ecliptic South Pole". Monthly Notices of the Royal Astronomical Society 527 (1): 35–52. doi:10.1093/mnras/stad1439. ISSN 0035-8711. "[W]hile several 'habitable zone' planets discovered by TESS have been confirmed (e.g. Gilbert et al. 2020; Vach et al. 2022), none yet have fallen within the conservative habitable zone as described by Kopparapu et al. (2013)—until now.".
- ↑ Nazzaro, Miranda (February 5, 2024). "NASA announces 'super-Earth,' exoplanet in 'habitable zone'". The Hill. https://thehill.com/homenews/space/4450048-nasa-announces-super-earth-exoplanet-in-habitable-zone/.
- ↑ 6.0 6.1 Brennan, Pat (January 31, 2024). "Discovery Alert: A 'Super-Earth' in the Habitable Zone". NASA. https://science.nasa.gov/universe/exoplanets/discovery-alert-a-super-earth-in-the-habitable-zone/.
- ↑ Gough, Evan (2024-02-02). "A Super-Earth (and Possible Earth-Sized) Exoplanet Found in the Habitable Zone" (in en-US). https://www.universetoday.com/165558/a-super-earth-and-possible-earth-sized-exoplanet-found-in-the-habitable-zone/.
- ↑ Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ "★ TOI 715" (in en). https://www.stellarcatalog.com/stars/toi-715.
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