HD 32453

Last updated
HD 32453
Observation data
Epoch J2000.0        Equinox J2000.0 (ICRS)
Constellation Caelum [1]
Right ascension 05h 01m 34.5225s [2]
Declination −39° 43′ 04.964″ [2]
Apparent magnitude  (V)6.01±0.01 [3]
Characteristics
Spectral type G8 III [4]
B−V color index +0.88 [5]
Astrometry
Radial velocity (Rv)5.73±0.12 [2] km/s
Proper motion (μ)RA: −5.456 [2] mas/yr
Dec.: +32.717 [2] mas/yr
Parallax (π)8.0168±0.0344  mas [2]
Distance 407 ± 2  ly
(124.7 ± 0.5  pc)
Absolute magnitude  (MV)+0.78 [1]
Details
Mass 2.40 [6]   M☉
Radius 10.03 [7] [8]   R☉
Luminosity 50.1 [9]   L☉
Surface gravity (log g)3.18±0.14 [10]   cgs
Temperature 5,032±61 [9]   K
Metallicity [Fe/H]−0.02±0.13 [10]   dex
Rotational velocity (v sin i)2±1.4 [11]  km/s
Age 700 [6]   Myr
Other designations
CD−39°1744, HD 32453, HIP 23377, HR 1631, SAO 195501
Database references
SIMBAD data

HD 32453 (HR 1631) is a solitary star located in the southern constellation Caelum. With an apparent magnitude of 6.01, [3] it's barely visible to the naked eye under ideal conditions. This star is located 407 light years away based on its parallax shift, but is drifting away at a rate of 5.73 km/s. [2]

HD 32453 has a classification of G8 III, [4] which states it is an evolved G-type star that exhausted hydrogen at its core and left the main sequence. At present it has 2.40 [6] times the Sun's mass, but at an age of 700 million years, [6] HD 32453 has expanded to 10 [7] times the latter's girth (radius detected from an angular diameter of 0.748 mas [8] ). It radiates at 50 [9] solar luminosities from its enlarged photosphere at an effective temperature of 5,032 K, [9] which gives it a yellow hue. HD 32453 is slightly metal deficient, [10] and spins slowly with a projected rotational velocity of 2 km/s, [11] common for a giant star.

References

  1. 1 2 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. XHIP record for this object at VizieR.
  2. 1 2 3 4 5 6 7 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.
  3. 1 2 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (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.
  4. 1 2 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. 1 2 3 4 Demarque, Pierre; Woo, Jong-Hak; Kim, Yong-Cheol; Yi, Sukyoung K. (December 2004). "Y 2 Isochrones with an Improved Core Overshoot Treatment". The Astrophysical Journal Supplement Series. 155 (2): 667–674. arXiv: astro-ph/0409024 . Bibcode:2004ApJS..155..667D. doi: 10.1086/424966 . ISSN   1538-4357.
  7. 1 2 Lang, Kenneth R. (2006), Astrophysical formulae, Astronomy and astrophysics library, vol. 1 (3 ed.), Birkhäuser, ISBN   3-540-29692-1 . The radius (R*) is given by:
  8. 1 2 Stevens, Daniel J.; Stassun, Keivan G.; Gaudi, B. Scott (1 December 2017). "Empirical Bolometric Fluxes and Angular Diameters of 1.6 Million Tycho-2 Stars and Radii of 350,000 Stars with Gaia DR1 Parallaxes". The Astronomical Journal. 154 (6): 259. arXiv: 1708.05025 . Bibcode:2017AJ....154..259S. doi: 10.3847/1538-3881/aa957b . ISSN   0004-6256. S2CID   119191064.
  9. 1 2 3 4 Luck, R. Earle (25 August 2015). "Abundances in the Local Region. I. G and K Giants". The Astronomical Journal. 150 (3): 88. arXiv: 1507.01466 . Bibcode:2015AJ....150...88L. doi: 10.1088/0004-6256/150/3/88 . ISSN   1538-3881.
  10. 1 2 3 Alves, S.; Benamati, L.; Santos, N. C.; Adibekyan, V. Zh.; Sousa, S. G.; Israelian, G.; De Medeiros, J. R.; Lovis, C.; Udry, S. (11 April 2015). "Determination of the spectroscopic stellar parameters for 257 field giant stars★". Monthly Notices of the Royal Astronomical Society. 448 (3): 2749–2765. arXiv: 1503.02556 . Bibcode:2015MNRAS.448.2749A. doi: 10.1093/mnras/stv189 . ISSN   1365-2966.
  11. 1 2 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: V. Southern stars⋆⋆⋆". Astronomy & Astrophysics. 561: A126. arXiv: 1312.3474 . Bibcode:2014A&A...561A.126D. doi: 10.1051/0004-6361/201220762 . ISSN   1432-0746.
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