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.[2]

WASP-7b
Size comparison of WASP-7b with Jupiter.
Discovery
Discovered byCameron et al. (SuperWASP)
Discovery siteSAAO
Discovery dateApril 1, 2008
Transit
Orbital characteristics
0.0618+0.0014
−0.0033 AU
Eccentricity0.0173+0.0009
−0.0011[1]
4.954658+5.5e-5
−4.3e-5 d
Inclination89.6+0.4
−0.9
StarWASP-7
Physical characteristics
Mean radius
0.915+0.046
−0.04 RJ
Mass0.96+0.12
−0.18 MJ
Mean density
1,660 kg/m3 (2,800 lb/cu yd)
3.03 g
Temperature1393+80
−82 K[1]

    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.[3] The orbit is also slightly eccentric, which is surprising given the tidal circularization timescale of below 650 million years.[1]

    Physical properties

    The measured temperature on the planetary dayside is 1393+80
    −82     K.[1]

    See also

    References
    1. Trends in Spitzer Secondary Eclipses, 2021, arXiv:2103.15833
    2. 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.
    3. Obliquities of Hot Jupiter host stars: Evidence for tidal interactions and primordial misalignments, 2012, arXiv:1206.6105

    Media related to WASP-7b at Wikimedia Commons


    This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.