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Star in the constellation Columba
Nu2 Columbae is a solitary
star
[11] in the southern
constellation of
Columba . It can be seen with the naked eye, having an
apparent visual magnitude of 5.31.
[2] With an annual
parallax shift of 24.51
mas ,
[1] it is estimated to lie about 133
light years from the
Sun .
This star has a
stellar classification of F5 V,
[3] indicating that it is an
F-type main sequence star that is generating energy through the
thermonuclear fusion of hydrogen into helium in its core region. It has about 1.65 times the
mass of the Sun
[4] and 1.6 times the
Sun's radius .
[6] X-ray emission has been detected from this star, with an estimated luminosity of 1.6× 1029
erg/s .
[5] It is about 1.8 billion years old
[4] and is spinning with a
projected rotational velocity of 27.2 km/s .
[8] The star is radiating about 10 times the
solar luminosity from its
outer atmosphere
[7] at an
effective temperature of 6,473 K .
[4]
References
^
a
b
c
d
e
f 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 .
^
a
b
c
d 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 .
^
a
b Houk, Nancy (1979), Michigan catalogue of two-dimensional spectral types for the HD stars , vol. 3, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan,
Bibcode :
1982mcts.book.....H .
^
a
b
c
d
e
f
g 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,
arXiv :
1103.4651 ,
Bibcode :
2011A&A...530A.138C ,
doi :
10.1051/0004-6361/201016276 ,
S2CID
56118016 .
^
a
b Pizzolato, N.; et al. (September 2000), "Evolution of X-ray activity of 1-3 Msun late-type stars in early post-main-sequence phases", Astronomy and Astrophysics , 361 : 614–628,
Bibcode :
2000A&A...361..614P .
^
a
b Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics", Astronomy and Astrophysics , 367 (2): 521–524,
arXiv :
astro-ph/0012289 ,
Bibcode :
2001A&A...367..521P ,
doi :
10.1051/0004-6361:20000451 ,
S2CID
425754 .
^
a
b 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 .
^
a
b
c [
permanent dead link ]
^ Balachandran, Suchitra (May 1, 1990), "Lithium depletion and rotation in main-sequence stars", Astrophysical Journal, Part 1 , 354 : 310–332,
Bibcode :
1990ApJ...354..310B ,
doi :
10.1086/168691 .
^
"nu.02 Col -- Star" , SIMBAD Astronomical Database ,
Centre de Données astronomiques de Strasbourg , retrieved 2016-12-30 .
^ 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 .