6 Lyncis is a star in the northern constellation of Lynx,[1] located approximately 179 light years from Earth.[2] It is visible to the naked eye as a dim, orange-hued star with an apparent visual magnitude of 5.86.[3] This object is moving away from the Earth with a heliocentric radial velocity of +40 km/s.[3] It has a relatively high proper motion, traversing the celestial sphere at the rate of 0.341 arc seconds per annum.[4] One exoplanet is known to orbit it.[5]

This is an aging giant star with a stellar classification of K0.5 IIIb Fe0.5,[6] which indicates it has a mild overabundance of iron in its spectrum. At 2.8 billion years old,[7] it has exhausted the hydrogen at its core, causing it to evolve away from the main sequence. As a consequence, it has expanded to 5.12 times the radius of the Sun[8] although it only has 1.37 times the Sun's mass.[9] The star is radiating 14.2 times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,950 K.[7]

Planetary system

In July 2008, the planet 6 Lyncis b was announced by Bun'ei Sato and collaborators from the Okayama Planet Search Program, along with 14 Andromedae b and 81 Ceti b. The planet was found to have minimum mass of 2.4 Jupiter masses and period of 899 days.[5]

See also

References

  1. ^ "6 Lyn". Retrieved 2018-05-27.
  2. ^
  3. ^ Anderson, 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. S2CID 119257644
  4. ^ Lépine, Sébastien & Shara, Michael M. (March 2005). "A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog)". The Astronomical Journal. 129 (3): 1483–1522. arXiv:astro-ph/0412070. Bibcode:2005AJ....129.1483L. doi:10.1086/427854. S2CID 2603568
  5. ^ Sato, Bun'ei et al. (2008). "Planetary Companions to Evolved Intermediate-Mass Stars: 14 Andromedae, 81 Ceti, 6 Lyncis, and HD167042". Publications of the Astronomical Society of Japan. 60 (6): 1317–1326. arXiv:0807.0268. Bibcode:2008PASJ...60.1317S. doi:10.1093/pasj/60.6.1317. S2CID 67841762
  6. ^ Keenan, Philip C. & McNeil, Raymond C. (1989). "The Perkins catalog of revised MK types for the cooler stars". Astrophysical Journal Supplement Series. 71: 245. Bibcode:1989ApJS...71..245K. doi:10.1086/191373
  7. ^ Bonfanti, A. et al. (2015). "Revising the ages of planet-hosting stars". Astronomy and Astrophysics. 575: A18. arXiv:1411.4302. Bibcode:2015A&A...575A..18B. doi:10.1051/0004-6361/201424951. S2CID 54555839
  8. ^ White, T R; Huber, D; Mann, A W; Casagrande, L; Grunblatt, S K; Justesen, A B; Silva Aguirre, V; Bedding, T R; Ireland, M J; Schaefer, G H; Tuthill, P G (2018-07-11). "Interferometric diameters of five evolved intermediate-mass planet-hosting stars measured with PAVO at the CHARA Array". Monthly Notices of the Royal Astronomical Society. 477 (4): 4403–4413. arXiv:1804.05976. doi:10.1093/mnras/sty898. ISSN 0035-8711
  9. ^ Malla, Sai Prathyusha; Stello, Dennis; Huber, Daniel; Montet, Benjamin T; Bedding, Timothy R; Fredslund Andersen, Mads; Grundahl, Frank; Jessen-Hansen, Jens; Hey, Daniel R; Palle, Pere L; Deng, Licai; Zhang, Chunguang; Chen, Xiaodian; Lloyd, James; Antoci, Victoria (2020-08-21). "Asteroseismic masses of four evolved planet-hosting stars using SONG and TESS: resolving the retired A-star mass controversy". Monthly Notices of the Royal Astronomical Society. 496 (4): 5423–5435. arXiv:2006.07649. doi:10.1093/mnras/staa1793. ISSN 0035-8711