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HAT-P-41
Star in the constellation Aquila From Wikipedia, the free encyclopedia
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HAT-P-41 is a binary star system. Its primary is a F-type main-sequence star. Its surface temperature is 6390±100 K.[5] compared to the Sun, HAT-P-41 is enriched in heavy elements, with a metallicity Fe/H index of 0.21±0.10, but is much younger at an age of 2.2±0.4 billion years.[5]
The candidate stellar companion was detected simultaneously with the planet discovery in 2012.[7] A multiplicity survey in 2015 did confirm a dim stellar companion of later-K to early-M spectral class, with the probability of being a background star of 14%.[4] By 2020, it was concluded the candidate companion star is probably gravitationally bound.[8]
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Planetary system
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In 2012, one planet, named HAT-P-41b, was discovered on a tight, circular orbit around the primary star.[7]
The planetary orbit is mildly misaligned with the equatorial plane of the star, misalignment angle equal to −22.1+0.8
−6.0 degrees.[9]
The transmission spectrum of HAT-P-41b taken in 2020 has resulted in contradictory interpretations. One team has concluded the planetary atmosphere is metal-rich, with clear water signatures and absorption bands from sodium, aluminum, titanium and vanadium compounds.[10] Another team has interpreted the results as arising from a dense hydrogen atmosphere without detectable heavy elements, but with significant ionization.[11] The atmosphere also appears to contain significant cloud and hazes.[12] Neither heavy element compounds nor H− ion opacity were found in 2022 study.[13]
The planetary equilibrium temperature is within 1700-1950 K,[11] and the dayside temperature has been measured at 1622±125 K.[14]
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References
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