Astronomy:HD 43899

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Short description: Star in the constellation Columba
HD 43899
Observation data
Epoch J2000.0   Equinox (celestial coordinates)
Constellation Columba
Right ascension  06h 17m 01.23139s[1]
Declination −37° 44′ 14.8056″[1]
Apparent magnitude (V) 5.53±0.01[2]
Characteristics
Evolutionary stage red clump[3]
Spectral type K2 III[4]
U−B color index +1.11[5]
B−V color index +1.14[5]
Astrometry
Radial velocity (Rv)66.5±4.3[6] km/s
Proper motion (μ) RA: +1.657[1] mas/yr
Dec.: +83.920[1] mas/yr
Parallax (π)11.4725 ± 0.0449[1] mas
Distance284 ± 1 ly
(87.2 ± 0.3 pc)
Absolute magnitude (MV)+0.73[7]
Details
Mass1.15±0.10[3] M☉
Radius12.38[8] R☉
Luminosity61+2.6−5.0[1] L☉
Surface gravity (log g)2.04±0.24[3] cgs
Temperature4,686±122[9] K
Metallicity [Fe/H]−0.12±0.08[3] dex
Rotational velocity (v sin i)2.9±1[10] km/s
Age6.32±1.68[3] Gyr
Other designations
CD−37°2707, CPD−37°890, GC 8075, HD 43899, HIP 29842, HR 2263, SAO 196653[11]
Database references
SIMBADdata

HD 43899, also designated as HR 2263, is a solitary,[12] orange hued star located in the southern constellation Columba, the dove. It has an apparent magnitude of 5.53,[2] allowing it to be faintly visible to the naked eye. Based on parallax measurements from the Gaia spacecraft, the object is estimated to be 284 light years distant.[1] It appears to be rapidly receding with a heliocentric radial velocity of 66.5 km/s.[6] Eggen (1993) lists HD 43899 as an old disk star[13] and its kinematics match with that of the ζ Herculis moving group.[14]

HD 43899 is an evolved giant star that is currently on the horizontal branch, a red clump star, fusing a hydrogen shell around an inert helium core.[3] It has a stellar classification of K2 III.[4] At present the object has 115% the mass of the Sun[3] and an effective temperature of 4,686 K.[9] At the age of 6.32 billion years,[3] it has already left the main sequence and now radiates 61 times the luminosity of the Sun[1] from an enlarged photosphere 12.4 times that of the sun.[8] HD 43899 has an iron abundance 24% below solar levels, making it slightly metal deficient.[3] It spins modestly with a projected rotational velocity of 2.9 km/s.[10]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  2. ↑ 2.0 2.1 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P. et al. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355: L27–L30. ISSN 0004-6361. Bibcode: 2000A&A...355L..27H. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 Gallenne, A.; Pietrzyński, G.; Graczyk, D.; Nardetto, N.; Mérand, A.; Kervella, P.; Gieren, W.; Villanova, S. et al. (August 2018). "Fundamental properties of red-clump stars from long-baseline H-band interferometry". Astronomy & Astrophysics 616: A68. doi:10.1051/0004-6361/201833341. ISSN 0004-6361. Bibcode: 2018A&A...616A..68G. 
  4. ↑ 4.0 4.1 Houk, N. (1982). Michigan Catalogue of Two-dimensional Spectral Types for the HD stars. Volume_3. Declinations −40° to −26°. Bibcode: 1982mcts.book.....H. 
  5. ↑ 5.0 5.1 Przybylski, A.; Kennedy, P. M. (1 December 1965). "Radial Velocities and Three-colour Photometry of 166 Southern Stars". Monthly Notices of the Royal Astronomical Society 131 (1): 95–104. doi:10.1093/mnras/131.1.95. ISSN 0035-8711. Bibcode: 1965MNRAS.131...95P. 
  6. ↑ 6.0 6.1 Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. doi:10.1134/S1063773706110065. ISSN 1063-7737. Bibcode: 2006AstL...32..759G. 
  7. ↑ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331–346. doi:10.1134/S1063773712050015. ISSN 1063-7737. Bibcode: 2012AstL...38..331A. 
  8. ↑ 8.0 8.1 Kervella, Pierre; Arenou, Frédéric; Thévenin, Frédéric (2022). "Stellar and substellar companions from Gaia EDR3". Astronomy & Astrophysics 657: A7. doi:10.1051/0004-6361/202142146. ISSN 0004-6361. Bibcode: 2022A&A...657A...7K. 
  9. ↑ 9.0 9.1 Stassun, Keivan G. et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. Bibcode: 2019AJ....158..138S. 
  10. ↑ 10.0 10.1 De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (January 2014). "A catalog of rotational and radial velocities for evolved stars". Astronomy & Astrophysics 561: A126. doi:10.1051/0004-6361/201220762. ISSN 0004-6361. Bibcode: 2014A&A...561A.126D. 
  11. ↑ "HD 43899". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+43899. 
  12. ↑ Eggleton, P. P.; Tokovinin, A. A. (11 September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society 389 (2): 869–879. doi:10.1111/j.1365-2966.2008.13596.x. ISSN 0035-8711. Bibcode: 2008MNRAS.389..869E. 
  13. ↑ Eggen, O. J. (July 1993). "Evolved GK stars near the sun. I - The old disk population". The Astronomical Journal 106: 80. doi:10.1086/116622. Bibcode: 1993AJ....106...80E. 
  14. ↑ Eggen, O. J. (1 April 1958). "Stellar groups. II. The ζ Herculis, ε Indi and 61 Cygni Groups of High-Velocity Stars". Monthly Notices of the Royal Astronomical Society 118 (2): 154–160. doi:10.1093/mnras/118.2.154. ISSN 0035-8711. Bibcode: 1958MNRAS.118..154E. 
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