Nu Fornacis

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Nu Fornacis
Observation data
Epoch J2000      Equinox J2000
Constellation Fornax
Right ascension 02h 04m 29.43861s[1]
Declination −29° 17′ 48.5477″[1]
Apparent magnitude (V) 4.69[2] (4.68 - 4.73[3])
Characteristics
Spectral type B9.5IIIspSi[4]
U−B color index -0.51[2]
B−V color index -0.17[2]
Variable type α2 CVn[3]
Astrometry
Radial velocity (Rv) +18.50[5] km/s
Proper motion (μ) RA: +12.79[6] mas/yr
Dec.: +8.48[6] mas/yr
Parallax (π) 8.79 ± 0.26[1] mas
Distance 370 ± 10 ly
(114 ± 3 pc)
Absolute magnitude (MV) −0.60[7]
Details
Mass 3.65 ± 0.18[8] M
Radius 2.70[9]–3.2 ± 0.4[8] R
Luminosity 245[8] L
Temperature 13,400[10] K
Rotational velocity (v sin i) 50 ± 5[10] km/s
Other designations
CD−29° 706, FK5 1055, GC 2506, HIP 9677, HR 612, HD 12767, SAO 167532.[6]
Database references
SIMBAD data

Nu Fornacis, Latinized from ν For, is a class B9.5III[4] (blue giant) star in the constellation Fornax. Its apparent magnitude is 4.69[2] and it is approximately 371 light years away based on parallax.[1] It is around 3.65 times as massive and 245 times as luminous as the Sun, with around 3.2 times its diameter.[8] It is variable, with a period of 1.89 days—the same as its rotational period.[10] It is an Alpha2 Canum Venaticorum variable.

References[edit]

  1. ^ a b c d van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752Freely accessible. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.  Vizier catalog entry
  2. ^ a b c d Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237: 0. Bibcode:2002yCat.2237....0D. 
  3. ^ a b Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S. 
  4. ^ a b Abt, Helmut A.; Morrell, Nidia I. (July 1995), "The relation between Rotational Velocities and Spectral Peculiarities among A-type stars", The Astrophysical Journal Supplement Series, 99: 135–172, Bibcode:1995ApJS...99..135A, doi:10.1086/192182 
  5. ^ Wilson, R. E. (1953), "General Catalogue of Stellar Radial Velocities", Washington, Carnegie Institution of Washington, Bibcode:1953GCRV..C......0W, LCCN 54001336 
  6. ^ a b c "* nu. For". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2016-04-08. 
  7. ^ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971Freely accessible, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015. 
  8. ^ a b c d North, P. (1998). "Do SI stars undergo any rotational braking?". Astronomy and Astrophysics. 334: 181–87. arXiv:astro-ph/9802286Freely accessible. Bibcode:1998A&A...334..181N. 
  9. ^ Pasinetti Fracassini, L. E.; Pastori, L.; Covino, S.; Pozzi, A. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition", Astronomy and Astrophysics, 367 (2): 521–524, arXiv:astro-ph/0012289Freely accessible, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451  Vizier catalog entry
  10. ^ a b c Leone, F.; Catanzaro, G.; Malaroda, S. (2000). "A spectroscopic study of the magnetic chemically peculiar star nu Fornacis". Astronomy and Astrophysics. 359: 635–38. Bibcode:2000A&A...359..635L.