Tau3 Gruis

In today's world, Tau3 Gruis has become increasingly relevant in different areas of society. From its impact on the economy to its influence on everyday life, Tau3 Gruis has become a topic of constant interest and debate. Its importance lies in its ability to impact the way people, companies and institutions address different challenges and opportunities. In this article we will explore the various aspects related to Tau3 Gruis, from its origin and evolution to its potential consequences and benefits. Through detailed analysis, we will try to understand how Tau3 Gruis is shaping the world today and how it can influence the future.

For other stars with this Bayer designation, see τ Gruis.
Tau3 Gruis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Grus
Right ascension 22h 56m 47.80007s[1]
Declination −47° 58′ 09.1992″[1]
Apparent magnitude (V) 5.71[2]
Characteristics
Spectral type kA5hA7mF2[3]
U−B color index +0.17[2]
B−V color index +0.22[2]
Astrometry
Radial velocity (Rv)6.3±0.6[4] km/s
Proper motion (μ) RA: −24.942[1] mas/yr
Dec.: +2.848[1] mas/yr
Parallax (π)12.3180±0.1170 mas[1]
Distance265 ± 3 ly
(81.2 ± 0.8 pc)
Absolute magnitude (MV)+1.36[5]
Details
Radius2.88+0.13
−0.18[1] R☉
Luminosity26.8+0.3
−0.3[1] L☉
Temperature7,735+406
−158[1] K
Other designations
τ Gru, CD−48°14364, FK5 3832, HD 216823, HIP 113307, HR 8722, SAO 231364[6]
Database references
SIMBADdata

Tau3 Gruis is a solitary[7] star in the southern constellation of Grus. Its apparent magnitude is 5.71,[2] which is bright enough to be visible to the naked eye as a dim, white-hued star. The star is located around 265 light-years (81 pc) distant from the Sun based on parallax, and it is drifting further away with a radial velocity of 6 km/s.[4]

This is an Am star[8] with a stellar classification of kA5hA7mF2.[3] This notation indicates the spectrum displays the calcium K-line of an A5 star, the hydrogen lines of an A7 star, and the metal lines of an F2 star.[9] It has 2.9[1] times the Sun's radius and is radiating 27[1] times the luminosity of the Sun from its photosphere at an effective temperature of around 7,735 K.[1]

References

  1. ^ a b c d e f g h i j k 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. ^ a b c d Feinstein, A. (1974), "Photoelectric UBVRI observations of Am stars", Astronomical Journal, 79: 1290, Bibcode:1974AJ.....79.1290F, doi:10.1086/111675.
  3. ^ a b Abt, Helmut A.; Morrell, Nidia I. (1995), "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars", Astrophysical Journal Supplement, 99: 135, Bibcode:1995ApJS...99..135A, doi:10.1086/192182
  4. ^ a b Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35495 Hipparcos stars in a common system", Astronomy Letters, 32 (11): 759–771, arXiv:1606.08053, Bibcode:2006AstL...32..759G, doi:10.1134/S1063773706110065, S2CID 119231169.
  5. ^ 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.
  6. ^ "tau03 Gru". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-06-24.{{cite web}}: CS1 maint: postscript (link)
  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. ^ Renson, P.; Manfroid, J. (2009), "Catalogue of Ap, HgMn and Am stars", Astronomy and Astrophysics, 498 (3): 961–966, Bibcode:2009A&A...498..961R, doi:10.1051/0004-6361/200810788.
  9. ^ Gray, Richard O.; Corbally, J. (2009), Stellar Spectral Classification, Princeton University Press, p. 178, ISBN 978-0691125114.