Gamma Phoenicis

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Gamma Phoenicis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Phoenix
Right ascension 01h 28m 21.93s[1]
Declination −43° 19′ 05.7″[1]
Apparent magnitude (V) 3.41[2]
Spectral type M0III[3]

Gamma Phoenicis is a star system in the constellation Phoenix. Located around 71.63 parsecs (233.6 ly) distant,[1] it is a red giant of spectral type M0III,[3] a star that has used up its core hydrogen and has expanded. A spectroscopic binary, the two components orbit each other in 193.75 days, producing eclipses that cause the apparent magnitude to drop to 3.49 from its baseline of 3.39.[4] The primary, with a spectral type of M0III,[3] is also a slow irregular variable, showing small intrinsic variations.[4]

References[edit]

  1. ^ a b c 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. 
  2. ^ "Gamma Phoenicis". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 13 July 2015. 
  3. ^ a b c Keenan, P.; McNeil, R. (October 1989). "The Perkins catalog of revised MK types for the cooler stars". Astrophysical Journal Supplement Series 71: 245–266. Bibcode:1989ApJS...71..245K. doi:10.1086/191373. 
  4. ^ a b Otero, Sebastián A. (October 2007). "New Elements for 54 Eclipsing Binaries". Open European Journal on Variable Stars 72 (1): 1–19. Bibcode:2007OEJV...72....1O.