Hot Jupiter
Hot Jupitersare a class ofgas giantexoplanetsthat are physically similar toJupiterbut have very shortorbital periods(P< 10 days).[1]They are close to their stars, with high surface-atmosphere temperatures.[2]Hot Jupiters are usuallytidally locked.
Hot Jupiters are the easiestextrasolar planetsto detect by theradial-velocitymethod. The oscillations of their parent stars' motion are large and rapid compared to those of other types of planets. These oscillations are caused by the planet orbiting its star in the line of sight of the Earth.
Since it seems that they are common, that raises the question of why theSolar Systemhas its largest planet so far from its star. This led astronomers to think the Earth's Jupiter was first much closer to the Sun, and moved out later to its present orbit.
One of the best-known hot Jupiters is51 Pegasi b.Discovered in 1995, it was the first extrasolar planet found orbiting a Sun-likestar.51 Pegasi bhas anorbital periodof 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.S2CID119117019.
- ↑"What worlds are out there?".Canadian Broadcasting Corporation.25 August 2016.Retrieved5 June2017.