Langbahn Team – Weltmeisterschaft

Rho Tucanae

Rho Tucanae
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Tucana
Right ascension 00h 42m 28.37166s[1]
Declination −65° 28′ 04.9100″[1]
Apparent magnitude (V) +5.38[2]
Characteristics
Spectral type F6 V[3]
U−B color index +0.00[2]
B−V color index +0.50[2]
Astrometry
Radial velocity (Rv)33.962±0.796[4] km/s
Proper motion (μ) RA: +53.07[1] mas/yr
Dec.: +40.94[1] mas/yr
Parallax (π)24.37 ± 0.27 mas[1]
Distance134 ± 1 ly
(41.0 ± 0.5 pc)
Absolute magnitude (MV)+2.75[5]
Orbit[6]
Period (P)4.8202 d
Eccentricity (e)0.02
Periastron epoch (T)2419299.11 JD
Semi-amplitude (K1)
(primary)		26.1 km/s
Details
ρ Tuc A
Mass1.66[7] M☉
Luminosity9.7[8] L☉
Surface gravity (log g)3.64±0.11[4] cgs
Temperature6,034±54[4] K
Metallicity [Fe/H]−0.26[4] dex
Rotational velocity (v sin i)23.5±1.2[5] km/s
Age2.64[3] Gyr
ρ Tuc B
Mass0.33[7] M☉
Other designations
ρ Tuc, CP−66° 47, FK5 2047, HD 4089, HIP 3330, HR 187, SAO 248237[9]
Database references
SIMBADdata

Rho Tucanae (ρ Tuc, ρ Tucanae) is a binary star system in the southern constellation of Tucana. It is visible to the naked eye with a combined apparent visual magnitude of +5.38.[2] Based upon an annual parallax shift of 24.37 mas as seen from Earth, it is located 131 light years from the Sun.

This is a single-lined spectroscopic binary with a close, nearly circular orbit having a period of 4.82 days and an eccentricity of 0.02.[6] The primary member, component A, is a yellow-white hued F-type main sequence star with a stellar classification of F6 V.[3] It is around 2.6 billion years old and a member of the thin disk population.[3] The primary has about 1.66 times the mass of the Sun while the secondary is just 0.33 times the Sun's mass.[7]

References

  1. ^ a b c d e van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600.
  2. ^ a b c d Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data, SIMBAD, Bibcode:1986EgUBV........0M.
  3. ^ a b c d Ibukiyama, A.; Arimoto, N. (November 2002), "HIPPARCOS age-metallicity relation of the solar neighbourhood disc stars", Astronomy and Astrophysics, 394 (3): 927–941, arXiv:astro-ph/0207108, Bibcode:2002A&A...394..927I, doi:10.1051/0004-6361:20021157, S2CID 17316450.
  4. ^ a b c d Kunder, Andrea; et al. (February 2017), "The Radial Velocity Experiment (RAVE): Fifth Data Release", The Astronomical Journal, 153 (2): 30, arXiv:1609.03210, Bibcode:2017AJ....153...75K, doi:10.3847/1538-3881/153/2/75, S2CID 118835808, 75.{{citation}}: CS1 maint: multiple names: authors list (link)
  5. ^ a b Reiners, Ansgar (January 2006), "Rotation- and temperature-dependence of stellar latitudinal differential rotation", Astronomy and Astrophysics, 446 (1): 267–277, arXiv:astro-ph/0509399, Bibcode:2006A&A...446..267R, doi:10.1051/0004-6361:20053911, S2CID 8642707
  6. ^ a b Pourbaix, D.; et al. (2004), "SB9: The ninth catalogue of spectroscopic binary orbits", Astronomy and Astrophysics, 424 (2): 727–732, arXiv:astro-ph/0406573, Bibcode:2004A&A...424..727P, doi:10.1051/0004-6361:20041213, S2CID 119387088.
  7. ^ a b c 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.
  8. ^ McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x, S2CID 118665352.
  9. ^ "rho Tuc". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-04-18.{{cite web}}: CS1 maint: postscript (link)
Quelle: http://en.wikipedia.org/wiki/Rho_Tucanae