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  • 21 Aug, 2019

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WASP-41
WASP-41 is a G-type main-sequence star. Its surface temperature is 5450±150 K. WASP-41 is similar to the Sun in its concentration of heavy elements, with a metallicity Fe/H index of −0.080±0.090, but is much younger at an age of 2.289±0.077 billion years. The star does exhibit strong starspot activity, with spots covering 3% of the stellar surface.

Multiplicity surveys did not detect any stellar companions as of 2017.

Planetary system

In 2012, one planet, named WASP-41b, was discovered on a tight, circular orbit. The transmission spectrum taken in 2017 was gray and featureless. No atmospheric constituents could be distinguished. The planetary orbit of WASP-41b is slightly misaligned with the equatorial plane of the star, at a misalignment angle of 9.15
−2.62°. Planetary equilibrium temperature is 1242±12 K.

Another planet, WASP-41c, was discovered in 2015. The planets are too far apart to significantly affect each other's orbits. The planetary equilibrium temperature of WASP-41c is 247±5 K.

The WASP-41 planetary system
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b 0.941
−0.064 MJ 		0.04022±0.00044 3.0524010±0.000004 <0.12 87.700±0.080° 1.200±0.060 RJ
c >3.2±0.20 MJ 1.36±0.04 421±2 0.294±0.024 >70° —

References

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  9. ^ Juvan, Ines G.; Lendl, M.; Cubillos, P. E.; Fossati, L.; Tregloan-Reed, J.; Lammer, H.; Guenther, E. W.; Hanslmeier, A. (2018), "PyTranSpot- A tool for multiband light curve modeling of planetary transits and stellar spots", Astronomy & Astrophysics, 610: A15, arXiv:1710.11209, Bibcode:2018A&A...610A..15J, doi:10.1051/0004-6361/201731345, S2CID 55138492
  10. ^ Neveu-VanMalle, M.; et al. (2016). "Hot Jupiters with relatives: Discovery of additional planets in orbit around WASP-41 and WASP-47". Astronomy and Astrophysics. 586. A93. arXiv:1509.07750. Bibcode:2016A&A...586A..93N. doi:10.1051/0004-6361/201526965. S2CID 53354547.
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