23 Andromedae

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23 Andromedae
Andromeda constellation map.svg
Red circle.svg
Location of 23 Andromedae (circled)
Observation data
Epoch J2000       Equinox J2000
Constellation Andromeda
Right ascension 00h 13m 30.83962s [1]
Declination +41° 02′ 07.3315″ [1]
Apparent magnitude  (V)5.71 [2]
Characteristics
Spectral type F0 IV [3]
B−V color index +0.331±0.004 [2]
Astrometry
Radial velocity (Rv)−27.1±1.2 [4] km/s
Proper motion (μ)RA: −123.289 [1] mas/yr
Dec.: −146.201 [1] mas/yr
Parallax (π)26.8161±0.0858  mas [1]
Distance 121.6 ± 0.4  ly
(37.3 ± 0.1  pc)
Absolute magnitude  (MV)+3.01 [5]
Details
Mass 1.43 [6]   M☉
Luminosity 49.9+5.5
−4.9 [3]   L☉
Surface gravity (log g)4.25 [6]   cgs
Temperature 7,089±241 [6]   K
Metallicity [Fe/H]−0.13±0.07 [7]   dex
Rotational velocity (v sin i)36 [3]  km/s
Age 759 [6]   Myr
Other designations
23 And, BD+40°29, FK5 2010, HD 905, HIP 1086, HR 41, SAO 36173, PPM 42707 [8]
Database references
SIMBAD data

23 Andromedae, abbreviated 23 And, is a presumed single [9] star in the constellation Andromeda, although it has been a suspected spectroscopic binary. [10] 23 Andromedae is the Flamsteed designation. Its apparent visual magnitude is 5.71, [2] which indicates it is dimly visible to the naked eye under good viewing conditions. The distance to 23 And, as determined from its annual parallax shift of 26.8  mas , [1] is 121.6  light years. The star is moving further from the Earth with a heliocentric radial velocity of −27 km/s. [4] It has a relatively high proper motion, traversing the celestial sphere at the rate of 0.191″ per year. [11]

The stellar classification of 23 And is F0 IV, [3] matching an F-type subgiant star that is in the process of evolving into a red giant. It displays a slight microvariability with a frequency of 0.85784 d−1 and an amplitude of 0.0062 magnitude. [12] The star is around 759 [6] million years old with a projected rotational velocity of 36 km/s. [3] It has 1.43 [6] times the mass of the Sun and is radiating 50 [3] times the Sun's luminosity from its photosphere at an effective temperature of 7,089 K. [6]

References

  1. 1 2 3 4 5 6 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 .
  2. 1 2 3 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, S2CID   119257644.
  3. 1 2 3 4 5 6 Zorec, J.; Royer, F. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv: 1201.2052 , Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691, S2CID   55586789.
  4. 1 2 de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv: 1208.3048 , Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, S2CID   59451347, A61.
  5. ↑ Holmberg, J.; et al. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics, 501 (3): 941–947, arXiv: 0811.3982 , Bibcode:2009A&A...501..941H, doi:10.1051/0004-6361/200811191, S2CID   1185775111
  6. 1 2 3 4 5 6 7 David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal, 804 (2): 146, arXiv: 1501.03154 , Bibcode:2015ApJ...804..146D, doi:10.1088/0004-637X/804/2/146, S2CID   33401607.
  7. ↑ Gáspár, András; et al. (August 2016), "The Correlation between Metallicity and Debris Disk Mass", The Astrophysical Journal, 826 (2): 14, arXiv: 1604.07403 , Bibcode:2016ApJ...826..171G, doi: 10.3847/0004-637X/826/2/171 , S2CID   119241004, 171.
  8. ↑ "23 And". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved September 21, 2018.
  9. ↑ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society , 389 (2): 869–879, arXiv: 0806.2878 , Bibcode:2008MNRAS.389..869E, doi: 10.1111/j.1365-2966.2008.13596.x , S2CID   14878976.
  10. ↑ Blanco, C.; et al. (November 1982), "Chromospheric MG II emission in A5 to K5 main sequence stars from high resolution IUE spectra", Astronomy and Astrophysics, 115 (2): 280–292, Bibcode:1982A&A...115..280B.
  11. ↑ Lépine, Sébastien; Shara, Michael M. (March 2005), "A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog)", The Astronomical Journal, 129 (3): 1483–1522, arXiv: astro-ph/0412070 , Bibcode:2005AJ....129.1483L, doi:10.1086/427854, S2CID   2603568.
  12. ↑ Koen, Chris; Eyer, Laurent (2002), "New periodic variables from the Hipparcos epoch photometry", Monthly Notices of the Royal Astronomical Society, 331 (1): 45–59, arXiv: astro-ph/0112194 , Bibcode:2002MNRAS.331...45K, doi: 10.1046/j.1365-8711.2002.05150.x , S2CID   10505995
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