HD 13189 – Wikipedia

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Orange-hued star in the constellation Taurus

HD 13189 is an 8th magnitude star in Triangulum constellation.

In 2005, a planetary companion or brown dwarf was announced in orbit around this star. At the time, the parallax estimate was 0.54±0.93 mas, which would suggest a distance of 6,040 ly (1,850 pc) with a high margin of error.[2] In 2007, van Leeuwen published a revised parallax measurement of 1.78±0.73 mas, which corresponds to a distance of 1,830 ly (560 pc) with a smaller but still significant margin of error.[10] In 2022 the Gaia spacecraft measured a parallax of 2.0450±0.0240 mas which is a distance of 1,590 ly (489 pc) with an error of only 20 ly (6 pc).

It has a spectral classification of K1II-III, making it a giant star that has evolved away from the main sequence. The mass is 1.2 times the Sun’s, while measurements of the star’s radius give estimates of 38 R☉. The atmosphere of the star displays short period radial velocity variations with a primary period of 4.89 days. This behavior is typical for giant K-type stars such as this and it is not the result of a close-orbit planetary companion.[11]

HD 13189 b[edit]

HD 13189 b is an exoplanet or brown dwarf with mass ranges from 8 to 20 Jupiter mass. This object is located at a mean distance of 277 Gm (1.85 AU) from the star, taking 472 days to make one elliptical orbit.

This object was discovered in Tautenburg, Germany in 2005.[12]

References[edit]

  1. ^ a b c d e f Vallenari, A.; et al. (Gaia Collaboration) (2022). “Gaia Data Release 3. Summary of the content and survey properties”. Astronomy & Astrophysics. arXiv:2208.00211. doi:10.1051/0004-6361/202243940. Gaia DR3 record for this source at VizieR.
  2. ^ a b Hatzes, A. P.; et al. (2005). “A giant planet around the massive giant star HD 13189”. Astronomy and Astrophysics. 437 (2): 743–751. Bibcode:2005A&A…437..743H. doi:10.1051/0004-6361:20052850.
  3. ^ Lee, B.-C.; et al. (May 2011). “A likely exoplanet orbiting the oscillating K-giant α Arietis”. Astronomy & Astrophysics. 529: A134. arXiv:1104.4431. Bibcode:2011A&A…529A.134L. doi:10.1051/0004-6361/201016293. S2CID 58906630.
  4. ^ Famaey, B.; et al. (January 2005). “Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters”. Astronomy and Astrophysics. 430 (1): 165–186. arXiv:astro-ph/0409579. Bibcode:2005A&A…430..165F. doi:10.1051/0004-6361:20041272. S2CID 17804304.
  5. ^ Gontcharov, G. A. (2011). “The red giant branch in the Tycho-2 catalogue”. Astronomy Letters. 37 (10): 707–717. arXiv:1607.00557. Bibcode:2011AstL…37..707G. doi:10.1134/S1063773711090040. S2CID 119272127.
  6. ^ a b c d Anders, F.; Khalatyan, A.; Queiroz, A. B. A.; Chiappini, C.; Ardevol, J.; Casamiquela, L.; Figueras, F.; Jimenez-Arranz, O.; Jordi, C.; Monguio, M.; Romero-Gomez, M.; Altamirano, D.; Antoja, T.; Assaad, R.; Cantat-Gaudin, T.; Castro-Ginard, A.; Enke, H.; Girardi, L.; Guiglion, G.; Khan, S.; Luri, X.; Miglio, A.; Minchev, I.; Ramos, P.; Santiago, B. X.; Steinmetz, M. (2022). “VizieR Online Data Catalog: StarHorse2, Gaia EDR3 photo-astrometric distances (Anders+, 2022)”. Vizier Online Data Catalog. Bibcode:2022yCat.1354….0A.
  7. ^ Stassun, Keivan G.; Collins, Karen A.; Gaudi, B. Scott (2017). “Accurate Empirical Radii and Masses of Planets and Their Host Stars with Gaia Parallaxes”. The Astronomical Journal. 153 (3): 136. arXiv:1609.04389. Bibcode:2017AJ….153..136S. doi:10.3847/1538-3881/aa5df3. S2CID 119219062.
  8. ^ Maldonado, J.; Villaver, E. (2016). “Evolved stars and the origin of abundance trends in planet hosts”. Astronomy and Astrophysics. 588: A98. arXiv:1602.00835. Bibcode:2016A&A…588A..98M. doi:10.1051/0004-6361/201527883. S2CID 119212009.
  9. ^ “HD 13189 — Star”. SIMBAD. Retrieved 2011-12-13.
  10. ^ van Leeuwen, F. (November 2007). “Validation of the new Hipparcos reduction”. Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A…474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600.
  11. ^ Hatzes, Artie P.; Zechmeister, Mathias (October 2008). “Stellar oscillations in planet-hosting giant stars”. Journal of Physics: Conference Series. 118 (1): 012016. Bibcode:2008JPhCS.118a2016H. doi:10.1088/1742-6596/118/1/012016.
  12. ^ A Giant Planet Around The Massive Giant Star HD 13189 Archived 2015-07-20 at the Wayback Machine

External links[edit]