Hot Jupiters are a class of gas giant exoplanets that are physically similar to Jupiter but have very short orbital periods (P < 10 days). The closeness to their stars and their high surface-atmosphere temperatures led to the nickname.
Hot Jupiters are the easiest extrasolar planets to detect via the radial-velocity method. The oscillations they induce in their parent stars' motion are large and rapid compared to those of other types of planets. One of the best-known hot Jupiters is 51 Pegasi b. Discovered in 1995, it was the first extrasolar planet found orbiting a Sun-like star. 51 Pegasi b has an orbital period of about 4 days.
References[change | change source]
- Wang, Ji; Fischer, Debra A.; Horch, Elliott P.; Huang, Xu (2015). "On the Occurrence Rate of Hot Jupiters in Different Stellar Environments". The Astrophysical Journal. 799 (2): 229. arXiv:1412.1731. Bibcode:2015ApJ...799..229W. doi:10.1088/0004-637X/799/2/229. S2CID 119117019.
- "What worlds are out there?". Canadian Broadcasting Corporation. 25 August 2016. Retrieved 5 June 2017.