83 Cancri

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83 Cancri
Observation data
Epoch J2000        Equinox J2000
Constellation Cancer
Right ascension 09h 18m 58.82772s [1]
Declination +17° 42′ 19.2744″ [1]
Apparent magnitude  (V)6.61 [2]
Characteristics
Evolutionary stage main sequence
Spectral type F4V [2] + WD [3]
B−V color index 0.487±0.030 [2]
Variable type constant [2]
Astrometry
Radial velocity (Rv)−14.8±0.4 [2] km/s
Proper motion (μ)RA: −135.130 [1] mas/yr
Dec.: −105.267 [1] mas/yr
Parallax (π)24.5641±0.0966  mas [1]
Distance 132.8 ± 0.5  ly
(40.7 ± 0.2  pc)
Absolute magnitude  (MV)3.57 [2]
Orbit [3]
Period (P)32±2.5 d
Eccentricity (e)0.6±0.2
Inclination (i)94±6°
Longitude of the node (Ω)148±5°
Periastron epoch (T)1976.0±3.5
Argument of periastron (ω)
(secondary)		351±42°
Details
83 Cnc A
Mass 1.13 [4]   M☉
Radius 1.53+0.02
−0.05 [1]   R☉
Luminosity 3.135±0.015 [1]   L☉
Surface gravity (log g)3.99 [4]   cgs
Temperature 6,218+96
−53 [1]   K
Metallicity [Fe/H]−0.26±0.02 [2]   dex
Age 3.1 [4]   Gyr
83 Cnc B
Mass 1.3 [3]   M☉
Other designations
83 Cnc, BD+18°2165, FK5 350, HD 80218, HIP 45699, SAO 98488 [5]
Database references
SIMBAD data

83 Cancri is an astrometric binary [6] [7] star system in the northern constellation of Cancer, positioned near the constellation border with Leo. It is a challenge to view with the naked eye, having an apparent visual magnitude of 6.61. [2] Despite having a Flamsteed designation, the system was too faint to be included in the Bright Star Catalogue . [8] It is located at a distance of 133  light years from the Sun, based on parallax, [1] but is drifting closer with a radial velocity of −15 km/s. [2] 83 Cancri has a relatively high proper motion, traversing the celestial sphere at an angular rate of 0.185″ per annum. [9]

The pair have an orbital period of around 32 days and an eccentricity of about 0.6. [3] The visible member of this system, designated component A, is an F-type main-sequence star with a stellar classification of F4V. [2] Its atmosphere is enhanced with s-process elements, particularly strontium and yttrium, which is attributed to mass transfer from the companion while the latter was on the asymptotic giant branch. [10] The primary is 3.1 [4]  billion years old with 1.1 [4] times the mass of the Sun and 1.5 [1] times the Sun's radius. It is radiating 3.1 [1] times the luminosity of the Sun from its photosphere at an effective temperature of 6,218 K. [1] The unseen secondary companion is most likely a high mass white dwarf, having around 1.3 times the Sun's mass. [3]

References

  1. 1 2 3 4 5 6 7 8 9 10 11 12 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 .
  2. 1 2 3 4 5 6 7 8 9 10 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 Goncharov, G. A.; Kiyaeva, O. V. (April 2002), "Astrometric Orbits from a Direct Combination of Ground-Based Catalogs with the Hipparcos Catalog", Astronomy Letters, 28 (4): 261–271, Bibcode:2002AstL...28..261G, doi:10.1134/1.1467262, S2CID   121692881.
  4. 1 2 3 4 5 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.
  5. ↑ "83 Cnc". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 19 August 2017.
  6. ↑ Tokovinin, Andrei (April 2014), "From Binaries to Multiples. II. Hierarchical Multiplicity of F and G Dwarfs", The Astronomical Journal, 147 (4): 14, arXiv: 1401.6827 , Bibcode:2014AJ....147...87T, doi:10.1088/0004-6256/147/4/87, S2CID   56066740, 87.
  7. ↑ 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.
  8. ↑ Bidelman, W. P. (December 1990), "Flamsteed stars not contained in the Yale "Catalogue of Bright Stars"", Bulletin d'Information du Centre de Données Stellaires, 38: 13, Bibcode:1990BICDS..38...13B.
  9. ↑ 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.
  10. ↑ Reddy, Bacham E.; et al. (March 2003), "The chemical compositions of Galactic disc F and G dwarfs", Monthly Notices of the Royal Astronomical Society, 340 (1): 304–340, arXiv: astro-ph/0211551 , Bibcode:2003MNRAS.340..304R, doi: 10.1046/j.1365-8711.2003.06305.x , S2CID   14388692.
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