TOI-715 b explained

Discoverer:Dransfield et al.
Discovery Site:TESS
Discovery Method:transit
Single Temperature:
TOI-715 b
Discovered:May 10, 2023
Star:TOI-715

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 0.083AU from its star.[4] The planet orbits in the habitable zone of its star and has an equilibrium temperature of 234K. 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.

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 S, it is located inside the conservative habitable zone.

TOI-715

See main article: article and TOI-715. TOI-715 is a red dwarf star located 42 parsecs (140 ly) from the Earth in the constellation Volans, very close to the southern celestial pole. 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.[8]

Further reading

Notes

  1. Web site: TOI-715 b. Exoplanet catalog. NASA. 2024-02-04.
  2. Web site: Earth.com. February 4, 2024. Super-Earth discovered in the "optimal" habitable zone of its star, TOI-715 b. Eric . Ralls.
  3. News: The Economic Times. February 4, 2024. NASA discovers 'Super-Earth' 137 light-years away.
  4. Dransfield . Georgina . Timmermans . Mathilde . Triaud . Amaury H. M. J. . Dévora-Pajares . Martín . Aganze . Christian . Barkaoui . Khalid . Burgasser . Adam J. . Collins . Karen A. . Cointepas . Marion . Ducrot . Elsa . Günther . Maximilian N. . Howell . Steve B. . Murray . Catriona A. . Niraula . Prajwal . Rackham . Benjamin V. . 1 . 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 . 2305.06206 . 10.1093/mnras/stad1439 . 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..
  5. News: NASA announces 'super-Earth,' exoplanet in 'habitable zone'. Miranda. Nazzaro . February 5, 2024. The Hill.
  6. Web site: Discovery Alert: A 'Super-Earth' in the Habitable Zone. Pat . Brennan. January 31, 2024. NASA News and Events. NASA.
  7. Web site: Gough . Evan . 2024-02-02 . A Super-Earth (and Possible Earth-Sized) Exoplanet Found in the Habitable Zone . 2024-06-18 . Universe Today . en-US.
  8. Web site: ★ TOI 715 . 2024-06-18 . Stellar Catalog . en.

References

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