Astronomy:Kappa Reticuli

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Short description: Star system in the constellation Reticulum
Kappa Reticuli
Reticulum IAU.svg
Red circle.svg
Location of κ Reticuli (circled)
Observation data
Equinox J2000.0]] (ICRS)
Constellation Reticulum
Right ascension  03h 29m 22.67724s[1]
Declination −62° 56′ 15.0991″[1]
Apparent magnitude (V) +4.71[2] + 10.7[3]
Characteristics
Spectral type F3 V[4] or F3 IV/V[5] + M1[6]
U−B color index −0.04[2]
B−V color index +0.39[2]
Astrometry
Radial velocity (Rv)+12.5±0.4[7] km/s
Proper motion (μ) RA: +382.84[1] mas/yr
Dec.: +373.05[1] mas/yr
Parallax (π)46.12 ± 0.13[1] mas
Distance70.7 ± 0.2 ly
(21.68 ± 0.06 pc)
Absolute magnitude (MV)+2.98[8]
Details
κ Ret A
Mass1.32[9] M☉
Radius1.1[10] R☉
Surface gravity (log g)4.31[9] cgs
Temperature6,796±231[9] K
Metallicity [Fe/H]−0.07[11] dex
Rotational velocity (v sin i)13.5±0.7[12] km/s
Age848[9] Myr
κ Ret B
Mass0.54[6] M☉
Radius0.50[6] R☉
Luminosity0.043[6] L☉
Temperature3,733[6] K
Other designations
κ Ret, 4 Ret, CD−63° 112, FK5 126, HD 22001, HIP 16245, HR 1083, SAO 248819, WDS J03294-6256A[13]
Database references
SIMBADdata

Kappa Reticuli (κ Reticuli) is a binary star[3] system in the southern constellation of Reticulum. It is visible to the naked eye, having a combined apparent visual magnitude of +4.71.[2] Based upon an annual parallax shift of 46.12 mas as seen from Earth,[1] it is located 71 light-years from the Sun. Based upon its space velocity components, this star is a member of the Hyades supercluster of stars that share a common motion through space.[14]

Houk and Cowley (1978) catalogued the yellow-hued[15] primary, component A, with a stellar classification of F3 IV/V,[5] indicating this is an F-type star that showing mixed traits of a main-sequence and a more evolved subgiant star. Later, Grey et al. (2006) listed a class of F3 V,[4] suggesting it is an F-type main-sequence star. It is emitting a statistically significant amount of infrared excess, suggesting the presence of an orbiting debris disk.[16] The secondary, component B, is an orange-hued[15] star with a visual magnitude of 10.4 at an angular separation of 54 arcseconds from the primary.[3]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V. 
  2. ↑ 2.0 2.1 2.2 2.3 Johnson, H. L. et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory 4 (99): 99, Bibcode: 1966CoLPL...4...99J. 
  3. ↑ 3.0 3.1 3.2 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. 
  4. ↑ 4.0 4.1 Gray, R. O. et al. (July 2006), "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 parsecs: The Northern Sample I", The Astronomical Journal 132 (1): 161–170, doi:10.1086/504637, Bibcode: 2006AJ....132..161G. 
  5. ↑ 5.0 5.1 Houk, Nancy; Cowley, A. P. (1978), "Michigan catalogue of two-dimensional spectral types for the HD stars", University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations -90_ to -53_ƒ0 (Ann Arbor: Dept. of Astronomy, University of Michigan) 1, Bibcode: 1975mcts.book.....H. 
  6. ↑ 6.0 6.1 6.2 6.3 6.4 Gaidos, E.; Mann, A. W.; Lépine, S.; Buccino, A.; James, D.; Ansdell, M.; Petrucci, R.; Mauas, P. et al. (2014). "Trumpeting M dwarfs with CONCH-SHELL: A catalogue of nearby cool host-stars for habitable exoplanets and life". Monthly Notices of the Royal Astronomical Society 443 (3): 2561. doi:10.1093/mnras/stu1313. Bibcode: 2014MNRAS.443.2561G. 
  7. ↑ 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. 
  8. ↑ Reiners, Ansgar (January 2006), "Rotation- and temperature-dependence of stellar latitudinal differential rotation", Astronomy and Astrophysics 446 (1): 267–277, doi:10.1051/0004-6361:20053911, Bibcode: 2006A&A...446..267R 
  9. ↑ 9.0 9.1 9.2 9.3 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, doi:10.1088/0004-637X/804/2/146, Bibcode: 2015ApJ...804..146D. 
  10. ↑ Pasinetti Fracassini, L. E. et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics 367 (2): 521–524, doi:10.1051/0004-6361:20000451, Bibcode: 2001A&A...367..521P. 
  11. ↑ Casagrande, L. et al. (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): 21, doi:10.1051/0004-6361/201016276, Bibcode: 2011A&A...530A.138C. 
  12. ↑ Ammler-von Eiff, Matthias; Reiners, Ansgar (June 2012), "New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?", Astronomy & Astrophysics 542: A116, doi:10.1051/0004-6361/201118724, Bibcode: 2012A&A...542A.116A. 
  13. ↑ "kap Ret". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=kap+Ret. 
  14. ↑ Montes, D. et al. (November 2001), "Late-type members of young stellar kinematic groups - I. Single stars", Monthly Notices of the Royal Astronomical Society 328 (1): 45–63, doi:10.1046/j.1365-8711.2001.04781.x, Bibcode: 2001MNRAS.328...45M, http://eprints.ucm.es/30941/1/castrorubio18libre.pdf, retrieved 2018-11-04. 
  15. ↑ 15.0 15.1 Streicher, Magda (December 2009), "Reticulum: The Celestial Crosshairs", Monthly Notes of the Astronomical Society of South Africa 68 (11–12): 242–246, Bibcode: 2009MNSSA..68..242S. 
  16. ↑ Gáspár, András et al. (May 2013), "The Collisional Evolution of Debris Disks", The Astrophysical Journal 768 (1): 29, doi:10.1088/0004-637X/768/1/25, 25, Bibcode: 2013ApJ...768...25G. 



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