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HD 15082

Coordinates : 02 h 26 m 51.0583 s , +37° 33′ 01.7377″ HD 15082 (also known as WASP-33 ) is a star located 397 light years away [ 3 ] in the northern constellation of Andromeda ....

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Coordinates: Sky map02h 26m 51.0583s, +37° 33′ 01.7377″

HD 15082 (also known as WASP-33) is a star located 397 light years away[3] in the northern constellation of Andromeda.[11] The star is a Delta Scuti variable[12] and a planetary transit variable. A hot Jupiter type extrasolar planet, named WASP-33b or HD 15082b, orbits this star with an orbital period of 1.22 days. It is the first Delta Scuti variable known to host a planet.[13]

Properties

HD 15082 is an Am star, which makes its stellar classification challenging to discern. The hydrogen lines and effective temperature of the star are similar to spectral type A8, however the calcium II K line resembles that of an A5 star, and the metallic lines are more similar to an F4 star. The spectral type is written kA5hA8mF4.[8] The star is about 100[9] million years old and is spinning with a projected rotational velocity of 86 km/s.[4] It has 1.55[8] times the mass of the Sun and 1.51 times the Sun's radius.[14]

The intrinsic variability of HD 15082 was discovered in 2011 by Enrique Herrero et al.[4] Delta Scuti variables usually exhibit many pulsation modes, and HD 15082 is no exception, with 8 measured high frequency p-modes.[12] Another proposed non-radial mode, which could be induced by tidal interactions with the planet, would make this star also a Gamma Doradus variable.[8] This star has the GCVS variable star designationV807 Andromedae.[15]

Planetary system

In 2010, the SuperWASP project announced the discovery of an exoplanet, designated WASP-33b, orbiting the star. The discovery was made by detecting the transit of the planet as it passes in front of its star, an event which occurs every 1.22 days.[8] It had first been identified as a planetary candidate in 2006.[16]

References

  1. ↑"MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 8 December 2021.
  2. 12Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015.
  3. 123456789Vallenari, 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.
  4. 1 2 3 4 5 6 Herrero, E.; et al. (febrero de 2011). "WASP-33: la primera estrella anfitriona del exoplaneta δ Scuti". Astronomía y Astrofísica . 526 : L10. arXiv : 1010.1173 . Código Bib : 2011A y A...526L..10H . doi : 10.1051/0004-6361/201015875 . S2CID 37446555 .  
  5. ^ Grenier, S.; Baylac, M.-O.; Rolland, L.; Quemadura, R.; Arenou, F.; Briot, D.; Delmas, F.; Duflot, M.; Genty, V.; Gómez, AE; Halbwachs, J.-L.; Marouard, M.; Oblak, E.; Sellier, A. (1999). "Velocidades radiales. Mediciones de 2800 estrellas B2-F5 para HIPPARCOS". Serie de Suplementos de Astronomía y Astrofísica . 137 : 451. Código Bib : 1999A y AS..137..451G . doi : 10.1051/aas:1999489 .
  6. ↑ Høg, E.; Fabricius, C.; Makarov, VV; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "El catálogo Tycho-2 de las 2,5 millones de estrellas más brillantes". Astronomía y Astrofísica . 355 : L27– L30. Bibcode : 2000A & A...355L..27H .
  7. 1 2 3 4 Chakrabarty, Aritra; Sengupta, Sujan (julio de 2019). "Observaciones de seguimiento de tránsito fotométrico preciso de cinco exoplanetas cercanos: actualización sobre sus propiedades físicas" . The Astronomical Journal . 158 (1): 39. arXiv : 1905.11258 . Bibcode : 2019AJ....158...39C . doi : 10.3847/1538-3881/ab24dd .
  8. 1 2 3 4 5 Collier Cameron, A.; et al. (2010). "Tomografía de perfil de línea de tránsitos de exoplanetas - II. Un planeta gigante gaseoso transitando una estrella A5 de rápida rotación" . Monthly Notices of the Royal Astronomical Society . 407 (1): 507. arXiv : 1004.4551 . Bibcode : 2010MNRAS.407..507C . doi : 10.1111/j.1365-2966.2010.16922.x . S2CID 11989684 .  
  9. 12Moya, A.; et al. (November 2011). "High spatial resolution imaging of the star with a transiting planet WASP-33". Astronomy & Astrophysics. 535: A110. arXiv:1110.3160. Bibcode:2011A&A...535A.110M. doi:10.1051/0004-6361/201116889. S2CID 54591538.
  10. ↑"HD 15082". SIMBAD. Centre de données astronomiques de Strasbourg.
  11. ↑"WASP-33 b". ETD - Exoplanet Transit Database. Retrieved 2010-04-28.
  12. 12von Essen, C.; Czesla, S.; Wolter, U.; Breger, M.; Herrero, E.; Mallonn, M.; Ribas, I.; Strassmeier, K. G.; Morales, J. C. (2014). "Pulsation analysis and its impact on primary transit modeling in WASP-33". Astronomy and Astrophysics. 561: A48. arXiv:1311.3614. Bibcode:2014A&A...561A..48V. doi:10.1051/0004-6361/201322453. S2CID 119213599.
  13. ↑"Discovery Of A Pulsating Star That Hosts A Giant Planet". Science Daily. January 19, 2011.
  14. ↑Goyal, Jayesh M.; Mayne, Nathan; Sing, David K.; Drummond, Benjamin; Tremblin, Pascal; Amundsen, David S.; Evans, Thomas; Carter, Aarynn L.; Spake, Jessica; Baraffe, Isabelle; Nikolov, Nikolay; Manners, James; Chabrier, Gilles; Hebrard, Eric (2018). "A library of ATMO forward model transmission spectra for hot Jupiter exoplanets". Monthly Notices of the Royal Astronomical Society. 474 (4): 5158. arXiv:1710.10269. Bibcode:2018MNRAS.474.5158G. doi:10.1093/mnras/stx3015. hdl:10871/30324. S2CID 55105931.
  15. ↑"GCVS Query forms".
  16. ↑Christian, D. J.; Pollacco, D. L.; Skillen, I.; Street, R. A.; Keenan, F. P.; Clarkson, W. I.; Collier Cameron, A.; Kane, S. R.; Lister, T. A.; West, R. G.; Enoch, B.; Evans, A.; Fitzsimmons, A.; Haswell, C. A.; Hellier, C.; Hodgkin, S. T.; Horne, K.; Irwin, J.; Norton, A. J.; Osborne, J. (November 2006). "The SuperWASP wide-field exoplanetary transit survey: candidates from fields 23 h < RA < 03 h". Monthly Notices of the Royal Astronomical Society. 372 (3): 1117–1128. Bibcode:2006MNRAS.372.1117C. doi:10.1111/j.1365-2966.2006.10913.x. hdl:10211.3/172060. Retrieved 10 November 2024.
  17. ↑Zhang, Michael; et al. (2017). "Phase curves of WASP-33b and HD 149026b and a New Correlation Between Phase Curve Offset and Irradiation Temperature". The Astronomical Journal. 155 (2): 83. arXiv:1710.07642. Bibcode:2018AJ....155...83Z. doi:10.3847/1538-3881/aaa458. S2CID 54755276.