astro.wikisort.org - Meteorite
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]
 Size comparison of WASP-7b with Jupiter. | |
| Discovery | |
|---|---|
| Discovered by | Cameron et al. (SuperWASP) |
| Discovery site | SAAO |
| Discovery date | April 1, 2008 |
Detection method | Transit |
| Orbital characteristics | |
Semi-major axis | 0.0618+0.0014 −0.0033 AU |
| Eccentricity | 0.0173+0.0009 −0.0011[1] |
Orbital period (sidereal) | 4.954658+5.5e-5 −4.3e-5 d |
| Inclination | 89.6+0.4 −0.9 |
| Star | WASP-7 |
| Physical characteristics | |
Mean radius | 0.915+0.046 −0.04 RJ |
| Mass | 0.96+0.12 −0.18 MJ |
Mean density | 1,660 kg/m3 (2,800 lb/cu yd) |
Surface gravity | 3.03 g |
| Temperature | 1393+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] Sodium was detected in the planetary atmosphere in 2022.[4]
See also
- SuperWASP
References
- Trends in Spitzer Secondary Eclipses, 2021, arXiv:2103.15833
- 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.
- Obliquities of Hot Jupiter host stars: Evidence for tidal interactions and primordial misalignments, 2012, arXiv:1206.6105
- Transmission spectroscopy of WASP-7 b with UVES Detection of Na i D2 and tentative D1 line absorption, 2022, arXiv:2210.08517
External links
Media related to WASP-7b at Wikimedia Commons
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На других языках
[de] WASP-7 b
WASP-7 b ist ein Exoplanet, der den Hauptreihenstern WASP-7 alle 4,95 Tage umkreist. Auf Grund seiner hohen Masse wird angenommen, dass es sich um einen Gasplaneten handelt.- [en] WASP-7b
[es] WASP-7b
WASP-7b Es un planeta extrasolar que orbita la estrella WASP-7, estrella de magnitud aparente 9.7, clase tipo espectral F6 y que posee una temperatura en su fotósfera de 6300 K. Se encuentra a unos 490 años luz de distancia.[ru] WASP-7 b
WASP-7B (HD 197286 B) — экстрасолнечная планета, обнаруженная в 2008 году. Планета немного меньше, чем Юпитер, примерно той же массы и более плотная.Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.
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