Astronomy:Mu Tauri

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Short description: Star in the constellation Taurus
Mu Tauri
Taurus IAU.svg
Red circle.svg
Location of μ Tauri (circled)
Observation data
Equinox J2000.0]] (ICRS)
Constellation Taurus
Right ascension  04h 15m 32.05687s[1]
Declination 08° 53′ 32.4916″[1]
Apparent magnitude (V) 4.27[2]
Characteristics
Spectral type B3IV[3]
U−B color index −0.51[4]
B−V color index −0.05[4]
Astrometry
Radial velocity (Rv)+16.3±0.6[5] km/s
Proper motion (μ) RA: +20.881[1] mas/yr
Dec.: −22.789[1] mas/yr
Parallax (π)6.6651 ± 0.3319[1] mas
Distance490 ± 20 ly
(150 ± 7 pc)
Absolute magnitude (MV)−1.45[2]
Details
Mass6.7[6] M
Luminosity462[2] L
Surface gravity (log g)3.75[7] cgs
Temperature16,980[7] K
Metallicity [Fe/H]−0.16[2] dex
Rotational velocity (v sin i)89[8] km/s
Age252[9] Myr
Other designations
μ Tau, 49 Tauri, BD+08°657, FK5 1118, GC 5134, HD 26912, HIP 116820, HR 1320, SAO 111696, GSC 00667-00839[10]
Database references
SIMBADdata

μ Tauri, Latinized as Mu Tauri, is a single[11] star in the equatorial constellation of Taurus. It has a blue-white hue and is faintly visible to the naked eye with an apparent visual magnitude of 4.27.[2] The star is located approximately 490 light years distant from the Sun based on parallax,[1] and is drifting further away with a radial velocity of +16 km/s.[5]

This object has a stellar classification of B3IV,[3] matching a B-type subgiant star. In the past this star was thought to have a variable radial velocity, but is now considered constant.[12] It is 252[9] million years old and is spinning with a projected rotational velocity of 89 km/s.[8] The star has 6.7[6] times the mass of the Sun and is radiating 462[2] times the Sun's luminosity from its photosphere at an effective temperature of 16,980 K.[7] It is emitting an infrared excess at a wavelength of 18 μm, making it a candidate host of a faint warm debris disk.[13]

References

  1. 1.0 1.1 1.2 1.3 1.4 1.5 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode2018A&A...616A...1G.  Gaia DR2 record for this source at VizieR.
  2. 2.0 2.1 2.2 2.3 2.4 2.5 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode2012AstL...38..331A.  Vizier catalog entry
  3. 3.0 3.1 Lesh, Janet Rountree (December 1968), "The Kinematics of the Gould Belt: an Expanding Group?", Astrophysical Journal Supplement 17: 371, doi:10.1086/190179, Bibcode1968ApJS...17..371L 
  4. 4.0 4.1 Mallama, A. (2014). "Sloan Magnitudes for the Brightest Stars". The Journal of the American Association of Variable Star Observers 42 (2): 443. Bibcode2014JAVSO..42..443M. Vizier catalog entry
  5. 5.0 5.1 Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. doi:10.1134/S1063773706110065. Bibcode2006AstL...32..759G. 
  6. 6.0 6.1 Tetzlaff, N. et al. (2011). "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun". Monthly Notices of the Royal Astronomical Society 410 (1): 190–200. doi:10.1111/j.1365-2966.2010.17434.x. Bibcode2011MNRAS.410..190T.  Vizier catalog entry
  7. 7.0 7.1 7.2 Soubiran, Caroline et al. (2016). "The PASTEL catalogue: 2016 version". Astronomy & Astrophysics 591: A118. doi:10.1051/0004-6361/201628497. Bibcode2016A&A...591A.118S. 
  8. 8.0 8.1 Hoffleit, D.; Warren, W. H. (1995). "Bright Star Catalogue". VizieR On-line Data Catalog: V/50. Originally Published in: 1964BS....C......0H 5050. Bibcode1995yCat.5050....0H. 
  9. 9.0 9.1 Gontcharov, G. A. (November 2012), "Spatial distribution and kinematics of OB stars", Astronomy Letters 38 (11): 694–706, doi:10.1134/S1063773712110035, Bibcode2012AstL...38..694G 
  10. "mu Tau". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=mu+Tau. 
  11. 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. Bibcode2008MNRAS.389..869E. 
  12. Percy, J. R.; Lane, M. C. (May 1977). "Search for Beta Cephei stars. I - Photometric and spectroscopic studies of northern B-type stars". Astronomical Journal 82: 353–359. doi:10.1086/112057. Bibcode1977AJ.....82..353P. 
  13. Ishihara, Daisuke et al. (May 2017). "Faint warm debris disks around nearby bright stars explored by AKARI and IRSF". Astronomy & Astrophysics 601: 18. doi:10.1051/0004-6361/201526215. A72. Bibcode2017A&A...601A..72I.