(Redirected from Epsilon² Arae )
Star in the constellation Ara
For other star systems with this Bayer designation , see Epsilon Arae .
Epsilon Arae (ε Arae, ε Ara) is the Bayer designation for a double star in the southern constellation of Ara . It is approximately 89 light-years (27 parsecs ) distant from Earth . With an apparent visual magnitude of 5.3, it is faintly visible to the naked eye.
The brighter star is a magnitude 5.44 F-type main sequence star with a stellar classification of F5 V Fe+0.5. The Fe+0.5 notation indicates that it has a somewhat higher than normal abundance of iron. It has a magnitude 8.65 companion at an angular separation of 0.590 arcseconds . It has a common proper motion white dwarf companion, WDS J17031-5314, with a magnitude of 13.47.
References
^ van Leeuwen, F. (November 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 .
^ Corben, P. M.; Stoy, R. H. (1968), "Photoelectric Magnitudes and Colours for Bright Southern Stars", Monthly Notes of the Astronomical Society of Southern Africa , 27 : 11, Bibcode :1968MNSSA..27...11C .
^ 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 .
^ Gray, R. O.; et al. (July 2006), "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 parsecs: The Northern Sample I", The Astronomical Journal , 132 (1): 161–170, arXiv :astro-ph/0603770 , Bibcode :2006AJ....132..161G , doi :10.1086/504637 , S2CID 119476992 .
^ "* eps02 Ara" . SIMBAD Centre de données astronomiques de Strasbourg . Retrieved 2015-03-03.
^ Holmberg, J.; Nordström, B.; Andersen, J. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics Supplement Series , 501 (3): 941–947, arXiv :0811.3982 , Bibcode :2009A&A...501..941H , doi :10.1051/0004-6361/200811191 , S2CID 118577511 .
^ 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 .
Schröder, C.; Reiners, Ansgar; Schmitt, Jürgen H. M. M. (January 2009), "Ca II HK emission in rapidly rotating stars. Evidence for an onset of the solar-type dynamo" (PDF), Astronomy and Astrophysics , 493 (3): 1099–1107, Bibcode :2009A&A...493.1099S , doi :10.1051/0004-6361:200810377
"GJ 2125 -- White Dwarf" , SIMBAD Astronomical Database , Centre de Données astronomiques de Strasbourg , retrieved 2010-07-28.
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The location of ε Arae (circled)
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