Astronomy:HD 23005

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Short description: Star in Camelopardlis
HD 23005
Camelopardalis constellation map.svg
Red circle.svg
Location of HD 23005 on the map (circled)
Observation data
Epoch J2000.0   Equinox (celestial coordinates)
Constellation Camelopardalis
Right ascension  03h 46m 00.94002s[1]
Declination +67° 12′ 05.7682″[1]
Apparent magnitude (V) 5.78±0.01[2]
Characteristics
Spectral type F1 IVnn[3]
U−B color index +0.05[4]
B−V color index +0.34[4]
Variable type candidate γ Doradus[3]
Astrometry
Radial velocity (Rv)4.9±1.5[5] km/s
Proper motion (μ) RA: +82.853[1] mas/yr
Dec.: −113.717[1] mas/yr
Parallax (π)18.8168 ± 0.0313[1] mas
Distance173.3 ± 0.3 ly
(53.14 ± 0.09 pc)
Absolute magnitude (MV)+2.07[6]
Details
Mass1.69±0.07[7] M☉
Radius2.26±0.11[8] R☉
Luminosity10.93±0.04[1] L☉
Surface gravity (log g)3.9±0.1[9] cgs
Temperature6,976±80[10] K
Metallicity [Fe/H]+0.15[11] dex
Rotational velocity (v sin i)66±7[12] km/s
Age1.1±0.1[13] Gyr
Other designations
BD+66°284, FK5 2267, GC 4463, HD 23005, HIP 17585, HR 1124, SAO 12890[14]
Database references
SIMBADdata

HD 23005, also known as HR 1124, is a soltiary,[15] yellowish-white hued star located in the northern circumpolar constellation Camelopardalis, the giraffe. It has an apparent magnitude of 5.78, making it faintly visible to the naked eye. The object is located relatively close at a distance of 173 light years based on Gaia DR3 parallax measurements but is receding with a heliocentric radial velocity of 4.9 km/s.[5] At its current distance, HD 23005's brightness is diminished by 0.15 magnitudes due to extinction from interstellar dust.[16] It has an absolute magnitude of +2.07.[6]

The star has been given several stellar classifications over the years. It has been given a luminosity class of a subgiant (IV),[17] a blend of a subgiant and main sequence star (IV/V),[18] and a class intermediate between a bright giant and a regular giant star (II-III).[19] Most sources generally agree that it is an early F-type star.

HD 23005's newest spectral class is F1 IVnn, which indicates that it is an evolved F-type subgiant with very broad absorption features due to rapid rotation. It has 1.69 times the mass of the Sun[7] and an enlarged radius of 2.26 R☉.[8] It radiates 10.9 times the luminosity of the Sun[1] from its photosphere at an effective temperature of 6,976 K.[10] HD 23005 has an iron abundance 141% that of the Sun's[11] and is estimated to be 1.1 billion years old.[13] Contrary to its suffix, the star spins modestly with a projected rotational velocity of 66 km/s. [12] A 2016 variable star survey identified HD 23005 as a candidate γ Doradus variable.[3]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 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. ↑ 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 Kahraman Aliçavuş, F.; Niemczura, E.; De Cat, P.; Soydugan, E.; Kołaczkowski, Z.; Ostrowski, J.; Telting, J. H.; Uytterhoeven, K. et al. (19 February 2016). "Spectroscopic survey of γ Doradus stars – I. Comprehensive atmospheric parameters and abundance analysis of γ Doradus stars". Monthly Notices of the Royal Astronomical Society 458 (3): 2307–2322. doi:10.1093/mnras/stw393. ISSN 0035-8711. Bibcode: 2016MNRAS.458.2307K. 
  4. ↑ 4.0 4.1 Imagawa, Fumihiko (February 1967). "Observational Results of Three-color Photometry for F-type Stars (II)" (in en). Memoirs of the College of Science, University of Kyoto. Series A 31 (2): 93–100. https://cir.nii.ac.jp/crid/1050849378475608960. 
  5. ↑ 5.0 5.1 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. 
  6. ↑ 6.0 6.1 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. 
  7. ↑ 7.0 7.1 Allende Prieto, C.; Lambert, D. L. (December 1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: masses, radii and effective temperatures". Astronomy and Astrophysics 352: 555–562. ISSN 0004-6361. Bibcode: 1999A&A...352..555A. 
  8. ↑ 8.0 8.1 Kervella, P.; Thévenin, F.; Di Folco, E.; Ségransan, D. (October 2004). "The angular sizes of dwarf stars and subgiants". Astronomy & Astrophysics 426 (1): 297–307. doi:10.1051/0004-6361:20035930. ISSN 0004-6361. Bibcode: 2004A&A...426..297K. 
  9. ↑ 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 Casagrande, L.; Schönrich, R.; Asplund, M.; Cassisi, S.; Ramírez, I.; Meléndez, J.; Bensby, T.; Feltzing, S. (26 May 2011). "New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s): Improved astrophysical parameters for the Geneva-Copenhagen Survey⋆". Astronomy & Astrophysics 530: A138. doi:10.1051/0004-6361/201016276. ISSN 0004-6361. Bibcode: 2011A&A...530A.138C. 
  11. ↑ 11.0 11.1 Netopil, Martin (4 May 2017). "Metallicity calibrations for dwarf stars and giants in the Geneva photometric system". Monthly Notices of the Royal Astronomical Society 469 (3): 3042–3055. doi:10.1093/mnras/stx1077. ISSN 0035-8711. Bibcode: 2017MNRAS.469.3042N. 
  12. ↑ 12.0 12.1 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 V: Southern stars". Astronomy & Astrophysics 561: A126. doi:10.1051/0004-6361/201220762. ISSN 0004-6361. Bibcode: 2014A&A...561A.126D. 
  13. ↑ 13.0 13.1 Nordström, B.; Mayor, M.; Andersen, J.; Holmberg, J.; Pont, F.; Jørgensen, B. R.; Olsen, E. H.; Udry, S. et al. (16 April 2004). "The Geneva-Copenhagen survey of the Solar neighbourhood". Astronomy & Astrophysics 418 (3): 989–1019. doi:10.1051/0004-6361:20035959. ISSN 0004-6361. Bibcode: 2004A&A...418..989N. 
  14. ↑ "HD 23005". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+23005. 
  15. ↑ 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. 
  16. ↑ Gontcharov, George A.; Mosenkov, Aleksandr V. (28 September 2017). "Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars". Monthly Notices of the Royal Astronomical Society 472 (4): 3805–3820. doi:10.1093/mnras/stx2219. ISSN 0035-8711. Bibcode: 2017MNRAS.472.3805G. 
  17. ↑ Appenzeller, Immo (April 1967). "MK Spectral Types for 185 Bright Stars". Publications of the Astronomical Society of the Pacific 79 (467): 102. doi:10.1086/128449. ISSN 0004-6280. Bibcode: 1967PASP...79..102A. 
  18. ↑ Adams, Walter S.; Joy, Alfred H.; Humason, Milton L.; Brayton, Ada Margaret (April 1935). "The Spectroscopic Absolute Magnitudes and Parallaxes of 4179 Stars". The Astrophysical Journal 81: 187. doi:10.1086/143628. ISSN 0004-637X. Bibcode: 1935ApJ....81..187A. 
  19. ↑ Cowley, A. P. (April 1976). "Spectral classification of the bright F stars.". Publications of the Astronomical Society of the Pacific 88: 95. doi:10.1086/129905. ISSN 0004-6280. Bibcode: 1976PASP...88...95C. 



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