Astronomy:23 Andromedae

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Short description: Star in the constellation Andromeda
23 Andromedae
Location of 23 Andromedae (circled)
Observation data
Equinox J2000.0]] (ICRS)
Constellation Andromeda[1]
Right ascension  00h 13m 30.83999s[2]
Declination +41° 02′ 07.3358″[2]
Apparent magnitude (V) 5.71[1]
Characteristics
Evolutionary stage main sequence[2]
Spectral type F0 IV[3]
B−V color index +0.331±0.004[1]
Astrometry
Radial velocity (Rv)−27.1±1.2[4] km/s
Proper motion (μ) RA: −123.558[2] mas/yr
Dec.: −146.479[2] mas/yr
Parallax (π)26.8715 ± 0.0403[2] mas
Distance121.4 ± 0.2 ly
(37.21 ± 0.06 pc)
Absolute magnitude (MV)+3.01[5]
Details
Mass1.51[6] M☉
Radius1.66[6] R☉
Luminosity5.7[6] L☉
Surface gravity (log g)4.17[6] cgs
Temperature6,921[6] K
Metallicity [Fe/H]−0.13±0.07[7] dex
Rotational velocity (v sin i)36[3] km/s
Age2.2[8] Gyr
Other designations
23 And, BD+40°29, FK5 2010, HD 905, HIP 1086, HR 41, SAO 36173, PPM 42707[9]
Database references
SIMBADdata

23 Andromedae, abbreviated 23 And, is a presumed single[10] star in the constellation Andromeda, although it has been a suspected spectroscopic binary.[11] 23 Andromedae is the Flamsteed designation. Its apparent visual magnitude is 5.71,[1] 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 26.9 mas,[2] is 121.4 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.[12]

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.[13] The star is around 2.2 billion years old[8] with a projected rotational velocity of 36 km/s.[3] It has 1.51 times the mass of the Sun and is radiating 5.7 times the Sun's luminosity from its photosphere at an effective temperature of 6,921 K.[6]

References

  1. ↑ 1.0 1.1 1.2 1.3 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A  XHIP record for this object at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 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.
  3. ↑ 3.0 3.1 3.2 3.3 Zorec, J.; Royer, F. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics 537: A120, doi:10.1051/0004-6361/201117691, Bibcode: 2012A&A...537A.120Z. 
  4. ↑ 4.0 4.1 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, doi:10.1051/0004-6361/201219219, A61, Bibcode: 2012A&A...546A..61D. 
  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, doi:10.1051/0004-6361/200811191, Bibcode: 2009A&A...501..941H1 
  6. ↑ 6.0 6.1 6.2 6.3 6.4 6.5 Stassun, Keivan G. et al. (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. 
  7. ↑ Gáspár, András et al. (August 2016), "The Correlation between Metallicity and Debris Disk Mass", The Astrophysical Journal 826 (2): 14, doi:10.3847/0004-637X/826/2/171, 171, Bibcode: 2016ApJ...826..171G. 
  8. ↑ 8.0 8.1 Zuckerman, Anna; Ko, Zoe; Isaacson, Howard; Croft, Steve; Price, Danny; Lebofsky, Matt; Siemion, Andrew (2023). "The Breakthrough Listen Search for Intelligent Life: A Laser Search Pipeline for the Automated Planet Finder". The Astronomical Journal 165 (3): 114. doi:10.3847/1538-3881/acb342. Bibcode: 2023AJ....165..114Z. 
  9. ↑ "23 And". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=23+And. 
  10. ↑ 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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E. 
  11. ↑ 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. 
  12. ↑ 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, doi:10.1086/427854, Bibcode: 2005AJ....129.1483L. 
  13. ↑ Koen, Chris; Eyer, Laurent (2002), "New periodic variables from the Hipparcos epoch photometry", Monthly Notices of the Royal Astronomical Society 331 (1): 45–59, doi:10.1046/j.1365-8711.2002.05150.x, Bibcode: 2002MNRAS.331...45K 



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