WASP-7b
WASP-7b is an extrasolar planet discovered in 2008. This 5-day period planet is slightly smaller than Jupiter, roughly the same mass and more dense.
A study in 2012, utilizing the Rossiter–McLaughlin effect, determined the planetary orbit is strongly misaligned with the equatorial plane of the star, with misalignment equal to 86±8°, making the planetary orbit nearly polar. The orbit is also slightly eccentric, which is surprising given the tidal circularization timescale of below 650 million years.
Physical properties
The measured temperature on the planetary dayside is 1393
−82 K. Sodium was detected in the planetary atmosphere in 2022.
See also
References
- ^ Wallack, Nicole L.; Knutson, Heather A.; Deming, Drake (2021), "Trends in Spitzer Secondary Eclipses", The Astronomical Journal, 162 (1): 36, arXiv:2103.15833, Bibcode:2021AJ....162...36W, doi:10.3847/1538-3881/abdbb2, S2CID 232417602
- ^ Hellier; et al. (December 11, 2008). "WASP-7: The brightest transiting-exoplanet system in the Southern hemisphere". The Astrophysical Journal Letters. 690 (1): L89–L91. arXiv:0805.2600. Bibcode:2009ApJ...690L..89H. doi:10.1088/0004-637X/690/1/L89. S2CID 15962609.
- ^ Albrecht, Simon; Winn, Joshua N.; Johnson, John A.; Howard, Andrew W.; Marcy, Geoffrey W.; Butler, R. Paul; Arriagada, Pamela; Crane, Jeffrey D.; Shectman, Stephen A.; Thompson, Ian B.; Hirano, Teruyuki; Bakos, Gaspar; Hartman, Joel D. (2012), "Obliquities of Hot Jupiter Host Stars: Evidence for Tidal Interactions and Primordial Misalignments", The Astrophysical Journal, 757 (1): 18, arXiv:1206.6105, Bibcode:2012ApJ...757...18A, doi:10.1088/0004-637X/757/1/18, S2CID 17174530
- ^ Rahmati, Hossein; Czesla, Stefan; Khalafinejad, Sara; Mollière, Paul (2022), "Transmission spectroscopy of WASP-7 b with UVES", Astronomy & Astrophysics, 668: A24, arXiv:2210.08517, doi:10.1051/0004-6361/202243955, S2CID 252917734
External links
Media related to WASP-7b at Wikimedia Commons
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