WASP-103

WASP-103
Observation data
Epoch J2000      Equinox J2000
Constellation Hercules
Right ascension 16h 37m 15.5766s[1]
Declination 07° 11′ 00.110″[1]
Apparent magnitude (V) 12.1[2]
Characteristics
Evolutionary stage main-sequence star[3]
Spectral type F8V[2]
Astrometry
Radial velocity (Rv)−40.69±1.00[1] km/s
Proper motion (μ) RA: −9.756[1] mas/yr
Dec.: 2.779[1] mas/yr
Parallax (π)1.8332 ± 0.1073 mas[1]
Distance1,800 ± 100 ly
(550 ± 30 pc)
Details
Mass1.220+0.039
−0.036[4] M☉
Radius1.436+0.052
−0.031[4] R☉
Luminosity3.3[1] L☉
Surface gravity (log g)4.35±0.02[1] cgs
Temperature6110±160[5] K
Metallicity [Fe/H]0.06±0.13[4] dex
Rotational velocity (v sin i)10.60±0.90[4] km/s
Age4±1[4] Gyr
Other designations
Gaia DR2 4439085988769170432, 2MASS J16371556+0711000[6]
Database references
SIMBADdata

WASP-103 is an F-type main-sequence star located 1,800 ± 100 light-years (550 ± 30 parsecs) away in the constellation Hercules. Its surface temperature is 6,110±160 kelvins (K). The star's concentration of heavy elements is similar to that of the Sun.[4] WASP-103 is slightly younger than the Sun at 4±1 billion years.[4] The chromospheric activity of the star is elevated due to interaction with the giant planet on a close-in orbit.[5]

A multiplicity survey in 2015 found a suspected stellar companion to WASP-103, at a projected separation of 0.242″±0.016″.[7]

  1. ^ a b c d e f g h Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  2. ^ a b Cite error: The named reference gillon2014 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Kreidberg2018 was invoked but never defined (see the help page).
  4. ^ a b c d e f g Cite error: The named reference Bonomo2017 was invoked but never defined (see the help page).
  5. ^ a b Staab, D.; Haswell, C. A.; Smith, Gareth D.; Fossati, L.; Barnes, J. R.; Busuttil, R.; Jenkins, J. S. (2017). "SALT observations of the chromospheric activity of transiting planet hosts: Mass-loss and star–planet interactions". Monthly Notices of the Royal Astronomical Society. 466 (1): 738–748. arXiv:1612.01739. Bibcode:2017MNRAS.466..738S. doi:10.1093/mnras/stw3172.
  6. ^ "WASP-103". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-05-05.
  7. ^ Wöllert, Maria; Brandner, Wolfgang (2015). "A Lucky Imaging search for stellar sources near 74 transit hosts". Astronomy & Astrophysics. 579: A129. arXiv:1506.05456. Bibcode:2015A&A...579A.129W. doi:10.1051/0004-6361/201526525. S2CID 118903879.