HD 34266

From Wikipedia, the free encyclopedia
HD 34266
Observation data
Epoch J2000      Equinox J2000
Constellation Columba
Right ascension 05h 14m 28.85s[1]
Declination −35° 58′ 37.19″[1]
Apparent magnitude (V) 5.731±0.009[2]
Characteristics
Evolutionary stage RGB[3]
Spectral type G8 III[4]
B−V color index +1.01[5]
Astrometry
Radial velocity (Rv)13±2[6] km/s
Proper motion (μ) RA: +10.812[1] mas/yr
Dec.: +14.095[1] mas/yr
Parallax (π)5.9558 ± 0.0589[1] mas
Distance548 ± 5 ly
(168 ± 2 pc)
Absolute magnitude (MV)-0.16[7]
Details
Mass2.84[8] M☉
Radius16.38+0.39
−0.18 R☉
Luminosity152±2 L☉
Surface gravity (log g)2.7 [9] cgs
Temperature5,004+27
−58 K
Metallicity [Fe/H]+0.01[9] dex
Rotational velocity (v sin i)2.3±1.2[10] km/s
Age490[8] Myr
Other designations
6 G. Columbae, CD−36 2127, HD 34266, HIP 24426, HR 1721[11]
Database references
SIMBADdata

HD 34266 (HR 1721) is a solitary star in the southern constellation Columba. With an apparent magnitude of 5.73, its faintly visible to the naked eye under ideal conditions. The star is located 548 light years away from the Solar System, but is drifting away with a heliocentric radial velocity of 13 km/s.

Properties[]

HD 34266 is 490 million years old, almost 10 times younger than our Sun. However, it's already on the red giant branch due to its high mass. HD 34266 has expanded to 16 solar radii, and is radiating at 152 solar luminosities from its photosphere at an effective temperature of 5,004 K, which gives it the typical yellow hue of a G-type star.

References[]

  1. ^ a b c d Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. ^ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (1 March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN 0004-6361.
  3. ^ Jones, M. I.; Jenkins, J. S.; Rojo, P.; Melo, C. H. F. (1 December 2011). "Study of the impact of the post-MS evolution of the host star on the orbits of close-in planets. I. Sample definition and physical properties". Astronomy and Astrophysics. 536: A71. arXiv:1110.6459. Bibcode:2011A&A...536A..71J. doi:10.1051/0004-6361/201117887. ISSN 0004-6361. S2CID 55769003.
  4. ^ Houk, N. (1 January 1982). Michigan Catalogue of Two-dimensional Spectral Types for the HD stars. Volume_3. Declinations -40_ƒ0 to -26_ƒ0. Bibcode:1982mcts.book.....H.
  5. ^ Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1 January 1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99–110. Bibcode:1966CoLPL...4...99J.
  6. ^ Wilson, Ralph Elmer (1 January 1953). "General catalogue of stellar radial velocities". Carnegie Institute Washington D.C. Publication: 0. Bibcode:1953GCRV..C......0W.
  7. ^ Anderson, E.; Francis, Ch. (1 May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. ISSN 1063-7737. S2CID 119257644.
  8. ^ a b Dotter, Aaron; Chaboyer, Brian; Jevremović, Darko; Kostov, Veselin; Baron, E.; Ferguson, Jason W. (1 September 2008). "The Dartmouth Stellar Evolution Database". The Astrophysical Journal Supplement Series. 178 (1): 89–101. arXiv:0804.4473. Bibcode:2008ApJS..178...89D. doi:10.1086/589654. ISSN 0067-0049. S2CID 119290835.
  9. ^ a b Alves, S.; Benamati, L.; Santos, N. C.; Adibekyan, V. Zh.; Sousa, S. G.; Israelian, G.; De Medeiros, J. R.; Lovis, C.; Udry, S. (1 April 2015). "Determination of the spectroscopic stellar parameters for 257 field giant stars★". Monthly Notices of the Royal Astronomical Society. 448 (3): 2749–2765. Bibcode:2015MNRAS.448.2749A. doi:10.1093/mnras/stv189. ISSN 0035-8711.
  10. ^ De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (1 January 2014). "A catalog of rotational and radial velocities for evolved stars. V. Southern stars". Astronomy and Astrophysics. 561: A126. arXiv:1312.3474. Bibcode:2014A&A...561A.126D. doi:10.1051/0004-6361/201220762. ISSN 0004-6361. S2CID 54046583.
  11. ^ "HR 1721". SIMBAD. Centre de données astronomiques de Strasbourg.
Retrieved from ""