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WASP-46
Star in the constellation Indus From Wikipedia, the free encyclopedia
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WASP-46 is a G-type main-sequence star about 1,210 light-years (370 parsecs) away. The star is older than the Sun and is strongly depleted in heavy elements compared to the Sun, having just 45% of the solar abundance.[3] Despite its advanced age, the star is rotating rapidly, being spun up by the tides raised by a giant planet in a close orbit.[7]
The star displays excess ultraviolet emission associated with starspot activity,[8] and is suspected to be surrounded by a dust and debris disk.[9]
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Planetary system
In 2011 a transiting hot superjovian planet, WASP-46b, was detected.[3] The planet's equilibrium temperature is 1,636±44 K.[5] The dayside temperature measured in 2014 is much higher at 2,386 K, indicating a very poor heat redistribution across the planet.[10] A re-measurement of the dayside planetary temperature in 2020 resulted in a lower value of 1,870+130
−120 K.[11]
In 2017, a search for transit-timing variations of WASP-46b yielded zero results, thus ruling out existence of additional gas giants in the system. The orbital decay of WASP-46b was also not detected.[12]
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References
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