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  • 21 Aug, 2019

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WASP-103
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. WASP-103 is slightly younger than the Sun at 4±1 billion years. The chromospheric activity of the star is elevated due to interaction with the giant planet on a close-in orbit.

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

Planetary system

Artist's impression of WASP-103b and its host star

In 2014 one super-Jupiter planet, named WASP-103b, was discovered by the transit method. The planet is orbiting its host star in 22 hours and may be close to the limit of tidal disruption. Orbital decay was not detected by 2020. In early 2022, the planet was popularized because of its shape similar to a potato.

The planetary atmosphere contains water, and possibly hydrogen cyanide, titanium(II) oxide, or sodium. The planet has an elevated carbon to oxygen molar fraction of 0.9 or 1.35
−0.17, therefore it is nearly certain to be a carbon planet.

The planetary equilibrium temperature is 2,484±67 K, although a big difference exists between the night side and day side. The dayside temperature is 2,930±40 K, while the night side temperature is 1,880±40 K.

The WASP-103 planetary system
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b 1.455
−0.091 MJ 		0.01987
−0.00021 		0.9255456±0.0000013 <0.15 87.3±1.2° 1.528
−0.047 RJ

References

  1. ^ 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. ^ Gillon, M.; Anderson, D. R.; Collier-Cameron, A.; Delrez, L.; Hellier, C.; Jehin, E.; Lendl, M.; Maxted, P. F. L.; Pepe, F.; Pollacco, D.; Queloz, D.; Ségransan, D.; Smith, A. M. S.; Smalley, B.; Southworth, J.; Triaud, A. H. M. J.; Udry, S.; Van Grootel, V.; West, R. G. (2014). "WASP-103 b: A new planet at the edge of tidal disruption". Astronomy & Astrophysics. 562: L3. arXiv:1401.2784. Bibcode:2014A&A...562L...3G. doi:10.1051/0004-6361/201323014. S2CID 53680974.
  3. ^ Kreidberg, Laura; Line, Michael R.; Parmentier, Vivien; Stevenson, Kevin B.; Louden, Tom; Bonnefoy, Mickäel; Faherty, Jacqueline K.; Henry, Gregory W.; Williamson, Michael H.; Stassun, Keivan; Beatty, Thomas G.; Bean, Jacob L.; Fortney, Jonathan J.; Showman, Adam P.; Désert, Jean-Michel; Arcangeli, Jacob (2018). "Global Climate and Atmospheric Composition of the Ultra-hot Jupiter WASP-103b fromHSTandSpitzer Phase Curve Observations". The Astronomical Journal. 156 (1): 17. arXiv:1805.00029. Bibcode:2018AJ....156...17K. doi:10.3847/1538-3881/aac3df. S2CID 56157823.
  4. ^ Bonomo, A. S.; et al. (2017). "The GAPS Programme with HARPS-N at TNG". Astronomy & Astrophysics. 602: A107. arXiv:1704.00373. Bibcode:2017A&A...602A.107B. doi:10.1051/0004-6361/201629882. S2CID 118923163.
  5. ^ 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.
  8. ^ Southworth, John; Mancini, L.; Ciceri, S.; Budaj, J.; Dominik, M.; Figuera Jaimes, R.; Haugbølle, T.; Jørgensen, U. G.; Popovas, A.; Rabus, M.; Rahvar, S.; von Essen, C.; Schmidt, R. W.; Wertz, O.; Alsubai, K. A.; Bozza, V.; Bramich, D. M.; Calchi Novati, S.; d'Ago, G.; Hinse, T. C.; Henning, Th.; Hundertmark, M.; Juncher, D.; Korhonen, H.; Skottfelt, J.; Snodgrass, C.; Starkey, D.; Surdej, J. (2015). "High-precision photometry by telescope defocusing – VII. The ultrashort period planet WASP-103★". Monthly Notices of the Royal Astronomical Society. 447 (1): 711–721. arXiv:1411.2767. Bibcode:2015MNRAS.447..711S. doi:10.1093/mnras/stu2394.
  9. ^ Patra, Kishore C.; Winn, Joshua N.; Holman, Matthew J.; Gillon, Michael; Burdanov, Artem; Jehin, Emmanuel; Delrez, Laetitia; Pozuelos, Francisco J.; Barkaoui, Khalid; Benkhaldoun, Zouhair; Narita, Norio; Fukui, Akihiko; Kusakabe, Nobuhiko; Kawauchi, Kiyoe; Terada, Yuka; Bouma, L. G.; Weinberg, Nevin N.; Broome, Madelyn (2020). "The Continuing Search for Evidence of Tidal Orbital Decay of Hot Jupiters". The Astronomical Journal. 159 (4): 150. arXiv:2002.02606. Bibcode:2020AJ....159..150P. doi:10.3847/1538-3881/ab7374. S2CID 211066260.
  10. ^ "Astronomers Discover Planet That Looks Like a Rugby Ball". NDTV Gadgets 360. 15 January 2022. Retrieved 2022-02-19.
  11. ^ Wilson, Jamie; Gibson, Neale P.; Nikolov, Nikolay; Constantinou, Savvas; Madhusudhan, Nikku; Goyal, Jayesh; Barstow, Joanna K.; Carter, Aarynn L.; De Mooij, Ernst J W.; Drummond, Benjamin; Mikal-Evans, Thomas; Helling, Christiane; Mayne, Nathan J.; Sing, David K. (2020). "Ground-based transmission spectroscopy with FORS2: A featureless optical transmission spectrum and detection of H2O for the ultra-hot Jupiter WASP-103b". Monthly Notices of the Royal Astronomical Society. 497 (4): 5155–5170. arXiv:2007.13510. Bibcode:2020MNRAS.497.5155W. doi:10.1093/mnras/staa2307.
  12. ^ Shi, Yaqing; Wang, Wei; Zhao, Gang; Zhai, Meng; Chen, Guo; Jiang, Zewen; Ouyang, Qinglin; Henning, Thomas; Zhao, Jingkun; Crouzet, Nicolas; Van Boekel, Roy; Esteves, Lisa (2023), "Thermal emission from the hot Jupiter WASP-103 b in J and K s bands", Monthly Notices of the Royal Astronomical Society, 522: 1491–1503, arXiv:2303.13732, doi:10.1093/mnras/stad891
  • Media related to WASP-103 at Wikimedia Commons
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