HD 32453 (HR 1631) is a solitary star located in the southern constellation Caelum. With an apparent magnitude of 6.01,[2] 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.[1]
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Caelum |
| Right ascension | 05h 01m 34.5225s[1] |
| Declination | −39° 43′ 04.9641″[1] |
| Apparent magnitude (V) | 6.01±0.01[2] |
| Characteristics | |
| Spectral type | G8 III[3] |
| B−V color index | +0.88[4] |
| Astrometry | |
| Radial velocity (Rv) | 5.73±0.12[1] km/s |
| Proper motion (μ) | RA: −5.456[1] mas/yr Dec.: +32.717[1] mas/yr |
| Parallax (π) | 8.0168 ± 0.0344 mas[1] |
| Distance | 407 ± 2 ly (124.7 ± 0.5 pc) |
| Absolute magnitude (MV) | +0.78[5] |
| 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 | |
| Database references | |
| SIMBAD | data |
HD 32453 has a classification of G8 III,[3] 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
edit- ^ a b c d e f g 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.
- ^ a b 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.
- ^ a b 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.
- ^ 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.
- ^ Anderson, E.; Francis, Ch. (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 255204555.
- ^ a b c d 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.
- ^ a b 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:
- ^ a b 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.
- ^ a b c d 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.
- ^ a b c 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.
- ^ a b 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.
