The Astrophysical Journal Letters<\/a>.<\/em><\/p>\nWhat are hot Jupiters?<\/h3>\n
Hot Jupiters are massive, gaseous planets similar to Jupiter that orbit extraordinarily close to their parent stars. They complete one orbit in only a few days.<\/p>\n
The close proximity between planet and star produces gravitational tides that transfer orbital energy, causing the planets to spiral inwards over billions of years until they are eventually consumed.<\/p>\n
WASP-12b is a hot Jupiter whose decaying orbit will send it into its host star WASP-12 in a few million years.<\/p>\n
Current theories cannot explain the observation of orbital decay in this system.<\/p>\n
Theories have revealed a new mechanism<\/h3>\n
According to the team, which also included scientists from the University of Leeds and Northwestern University, strong magnetic fields within certain sun-like stars can dissipate the gravitational tides from hot Jupiters very effectively.<\/p>\n
The tides create inward waves inside the stars.<\/p>\n
When the waves come into contact with magnetic fields, they get converted into different types of magnetic waves that travel outwards and eventually disappear.<\/p>\n
Dr Craig Duguid of Durham University, said: \u201cThis new mechanism has wide reaching implications for the survival of short period planets and particularly hot Jupiters.<\/p>\n
\u201cIt opens a new avenue of tidal research and will help guide observational astronomers in finding promising targets to observe orbital decay.<\/p>\n
\u201cIt is also quite exciting that this new mechanism could be observationally tested within our lifetime.\u201d<\/p>\n
Finding additional hot Jupiters<\/h3>\n
The findings suggest that some nearby stars could be good targets for searching for additional hot Jupiter planets with decaying orbits.<\/p>\n
If found, they could provide more evidence about how magnetic fields impact the tides from these planets.<\/p>\n
The research has the potential to reveal where the dissipated tidal energy goes within the star\u2019s interior.<\/p>\n","protected":false},"excerpt":{"rendered":"
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