Astronomy:HAT-P-41

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Short description: Star in the constellation Aquila
HAT-P-41
Observation data
Equinox J2000.0]] (ICRS)
Constellation Aquila
Right ascension  19h 49m 17.4400s[1]
Declination 04° 40′ 20.7836″[1]
Apparent magnitude (V) 11.36
Characteristics
HAT-P-41
Evolutionary stage main-sequence star
Spectral type F9V[2]
HAT-P-41B
Spectral type K9-M0[2]
Astrometry
Radial velocity (Rv)33.2±0.5[3] km/s
Proper motion (μ) RA: −3.177[3] mas/yr
Dec.: −6.570[3] mas/yr
Parallax (π)2.8477 ± 0.0176[3] mas
Distance1,145 ± 7 ly
(351 ± 2 pc)
Position (relative to HAT-P-41)[2]
ComponentHAT-P-41B
Epoch of observation2013
Angular distance3.619±0.005″
Position angle184.1±0.2°
Observed separation
(projected)		1270 AU
Details[4]
Mass1.418±0.047 M☉
Radius1.683+0.058−0.036 R☉
Temperature6390±100 K
Metallicity [Fe/H]0.21±0.10 dex
Rotational velocity (v sin i)19.60±0.50 km/s
Age2.2±0.4 Gyr
Other designations
TYC 488-2442-1, GSC 00488-02442, 2MASS J19491743+0440207[1]
HAT-P-41: Gaia DR2 4290415081653653632, Gaia EDR3 4290415081653653632
HAT-P-41B: Gaia DR2 4290415081653653376, Gaia EDR3 4290415081653653376
Database references
SIMBADdata
Hat-P-41b

HAT-P-41 is a binary star system. Its primary is a F-type main-sequence star. Its surface temperature is 6390±100 K.[4] 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.[4]

The candidate stellar companion was detected simultaneously with the planet discovery in 2012.[5] 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%.[2] By 2020, it was concluded the candidate companion star is probably gravitationally bound.[6]

Planetary system

In 2012, one planet, named HAT-P-41b, was discovered on a tight, circular orbit around the primary star.[5]

The planetary orbit is mildly misaligned with the equatorial plane of the star, misalignment angle equal to −22.1+0.8−6.0 degrees.[7]

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.[8] Another team has interpreted the results as arising from a dense hydrogen atmosphere without detectable heavy elements, but with significant ionization.[9] The atmosphere also appears to contain significant cloud and hazes.[10] Neither heavy element compounds nor H− ion opacity were found in 2022 study.[11]

The planetary equilibrium temperature is within 1700-1950 K,[9] and the dayside temperature has been measured at 1622±125 K.[12]

The HAT-P-41 planetary system[4]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b 0.795+0.056−0.091 MJ 0.04258+0.00047−0.00048 2.694047±0.000004 <0.22 87.7±1.0° 1.685+0.076−0.051 RJ

References

  1. ↑ 1.0 1.1 1.2 "HAT-P-41". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HAT-P-41. 
  2. ↑ 2.0 2.1 2.2 2.3 Wöllert, Maria; Brandner, Wolfgang; Bergfors, Carolina; Henning, Thomas (2015), "A Lucky Imaging search for stellar companions to transiting planet host stars", Astronomy & Astrophysics 575: A23, doi:10.1051/0004-6361/201424091, Bibcode: 2015A&A...575A..23W 
  3. ↑ 3.0 3.1 3.2 3.3 Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode: 2021A&A...649A...1G.  Gaia EDR3 record for this source at VizieR.
  4. ↑ 4.0 4.1 4.2 4.3 Bonomo, A. S.; Desidera, S.; Benatti, S.; Borsa, F.; Crespi, S.; Damasso, M.; Lanza, A. F.; Sozzetti, A. et al. (2017), "The GAPS Programme with HARPS-N at TNG", Astronomy & Astrophysics 602: A107, doi:10.1051/0004-6361/201629882, Bibcode: 2017A&A...602A.107B 
  5. ↑ 5.0 5.1 Hartman, J. D. (2012), "HAT-P-39b–HAT-P-41b: Three Highly Inflated Transiting Hot Jupiters", The Astronomical Journal 144 (5): 139, doi:10.1088/0004-6256/144/5/139, Bibcode: 2012AJ....144..139H 
  6. ↑ Bohn, A. J.; Southworth, J.; Ginski, C.; Kenworthy, M. A.; Maxted, P. F. L.; Evans, D. F. (2020), "A multiplicity study of transiting exoplanet host stars", Astronomy & Astrophysics 635: A73, doi:10.1051/0004-6361/201937127, Bibcode: 2020A&A...635A..73B 
  7. ↑ Johnson, Marshall C.; Cochran, William D.; Addison, Brett C.; Tinney, Chris G.; Wright, Duncan J. (2017), "Spin–Orbit Misalignments of Three Jovian Planets via Doppler Tomography", The Astronomical Journal 154 (4): 137, doi:10.3847/1538-3881/aa8462, Bibcode: 2017AJ....154..137J 
  8. ↑ Sheppard, Kyle B. (2021). "The Hubble PanCET Program: A Metal-rich Atmosphere for the Inflated Hot Jupiter HAT-P-41b". The Astronomical Journal 161 (2): 51. doi:10.3847/1538-3881/abc8f4. Bibcode: 2021AJ....161...51S. 
  9. ↑ 9.0 9.1 Lewis, N. K. (2020), "Into the UV: The Atmosphere of the Hot Jupiter HAT-P-41b Revealed", The Astrophysical Journal 902 (1): L19, doi:10.3847/2041-8213/abb77f, Bibcode: 2020ApJ...902L..19L 
  10. ↑ Wakeford, H. R.; Sing, D. K.; Stevenson, K. B.; Lewis, N. K.; Pirzkal, N.; Wilson, T. J.; Goyal, J.; Kataria, T. et al. (2020), "Into the UV: A Precise Transmission Spectrum of HAT-P-41b Using Hubble's WFC3/UVIS G280 Grism", The Astronomical Journal 159 (5): 204, doi:10.3847/1538-3881/ab7b78, Bibcode: 2020AJ....159..204W 
  11. ↑ Fu, Guangwei; Sing, David K.; Deming, Drake; Sheppard, Kyle; Wakeford, H. R.; Mikal-Evans, Thomas; Alam, Munazza K.; Dos Santos, Leonardo A. et al. (2022), "The Hubble PanCET Program: Emission Spectrum of Hot Jupiter HAT-P-41b", The Astronomical Journal 163 (4): 190, doi:10.3847/1538-3881/ac58fc, Bibcode: 2022AJ....163..190F 
  12. ↑ Garhart, Emily; Deming, Drake; Mandell, Avi; Knutson, Heather A.; Wallack, Nicole; Burrows, Adam; Fortney, Jonathan J.; Hood, Callie et al. (2020), "Statistical Characterization of Hot Jupiter Atmospheres Using Spitzer's Secondary Eclipses", The Astronomical Journal 159 (4): 137, doi:10.3847/1538-3881/ab6cff, Bibcode: 2020AJ....159..137G 

Coordinates: Sky map 19h 49m 17.4400s, +04° 40′ 20.7836″



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