TOI-677 b

TOI-677 b
Discovery
Discovery siteTransiting Exoplanet Survey Satellite[1]
Discovery date2019[1]
Transit method[1]
Orbital characteristics
Semi-major axis
0.1038 AU (15,530,000 km)
11.24 d[1]
Inclination87.63
StarTOI-677
Physical characteristics
Mean radius
1.170 RJ[1]
Mass1.236 MJ
Temperature1,252 K (979 °C; 1,794 °F)[1]

    TOI-677 b (TOI-677b) is a warm super-Jupiter type exoplanet orbiting the F-type main sequence star TOI-677 in the constellation ofOphiuchus[2] about 466 ly (143 pc) away from Earth.[3][4][5] The mass of the planet has been found to be 1.252 Jupiter masses and the radius of the planet is 1.179 Jupiter radii. It has a temperature of 1,252 K (979 °C; 1,794 °F). It orbits the star once every 11.24 days in an eccentric orbit (e=0.435).[1] The eccentricity of TOI-677b is possibly due to interactions between the protoplanetary disk and the planet itself. It the claims of an outer brown dwarf object in the TOI-677 system are true, then the brown dwarf may have had a role in the planets high eccentricity.[6]

    It is part of a emerging class of exoplanets called tidally detached gas giants that exhibits high eccentricities but low stellar obliquity. It is also part of a class of planetary systems with eccentric super-Jupiters orbiting stars hotter than 6100 Kelvin.[6]

    Discovery

    The planet was discovered by NASA's Transiting Exoplanet Survey Satellite (TESS) using the transit method, in which the dimming effect that a planet causes as it crosses in front of its star is measured. Discovery of the exoplanet was announced on 13 November 2019.[1][3][4][5]

    See also

    References

    1. 1 2 3 4 5 6 7 8 Jordán, Andrés; et al. (2020). "TOI-677 b: A Warm Jupiter (P=11.2d) on an eccentric orbit transiting a late F-type star". The Astronomical Journal. 159 (4): 145. arXiv:1911.05574. Bibcode:2020AJ....159..145J. doi:10.3847/1538-3881/ab6f67.
    2. ↑ Staff (2 August 2008). "Finding the constellation which contains given sky coordinates". DJM.cc. Retrieved 26 November 2019.
    3. 1 2 Nowakowski, Tomasz (21 November 2019). "New 'warm Jupiter' exoplanet discovered". Phys.org. Retrieved 26 November 2019.
    4. 1 2 Wehner, Mike (21 November 2019). "Astronomers spot steamy new exoplanet". Boy Genius Report. Retrieved 26 November 2019.
    5. 1 2 Gullett, Melanie J. (25 November 2019). "New "Warm Jupiter" Exoplanet Has Been Discovered". UpLoadComet.com. Retrieved 26 November 2019.
    6. 1 2 Hu, Qingru; Rice, Malena; Wang, Xian-Yu; Wang, Songhu; Shporer, Avi; Teske, Johanna K.; Yee, Samuel W.; Butler, R. Paul; Shectman, Stephen; Crane, Jeffrey D.; Collins, Karen A.; Collins, Kevin I. (March 2024). "The PFS View of TOI-677 b: A Spin–Orbit Aligned Warm Jupiter in a Dynamically Hot System*". The Astronomical Journal. 167 (4): 175. arXiv:2402.07346. Bibcode:2024AJ....167..175H. doi:10.3847/1538-3881/ad2855. ISSN 1538-3881.
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