Short description: Binary star in the constellation Aquarius
29 Aquarii is a binary star system located around 590 light years away from the Sun in the equatorial constellation of Aquarius. 29 Aquarii is the Flamsteed designation; the system also bears the variable star designation DX Aquarii. It is a challenge to view with the naked eye, appearing as a dim star with a combined apparent visual magnitude of 6.39.[3] The system is moving further from the Earth with a heliocentric radial velocity of about +15 km/s.[3]
This is a spectroscopic binary system with a close circular orbit taking just 0.945 days to complete.[6] Despite their proximity, this does not appear to be a contact binary system.[8] The orbital plane of the two stars lies near the line of sight, so they form an Algol-type eclipsing binary. The first component of the system is an A-type main sequence star with a stellar classification of A2 V. Its companion is giant star with a classification of K0 III.[4]
The variability of this system was first noticed in 1965 by W. Strohmeier of Remeis-Observatory in Bamberg, Germany .[9] He later discovered that the variability was caused by a binary companion eclipsing the primary star.[10]
References
- ↑ Molik, Petr. "Eclipsing binary DX Aqr". http://www.petrmolik.cz/shonpost.htm.
- ↑ 2.0 2.1 2.2 2.3 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. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 3.0 3.1 3.2 3.3 3.4 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 4.0 4.1 Zasche, P. et al. (August 2009), "A Catalog of Visual Double and Multiple Stars With Eclipsing Components", The Astronomical Journal 138 (2): 664–679, doi:10.1088/0004-6256/138/2/664, Bibcode: 2009AJ....138..664Z.
- ↑ van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V.
- ↑ 6.0 6.1 Paffhausen, W.; Seggewiss, W. (April 1976), "Spectroscopic orbits of the eclipsing binaries DV and CX Aqr", Astronomy and Astrophysics, Supplemental Series 24: 29–34, Bibcode: 1976A&AS...24...29P.
- ↑ "BD-17 6422 -- Spectroscopic binary", SIMBAD Astronomical Object Database (Centre de Données astronomiques de Strasbourg), http://simbad.u-strasbg.fr/simbad/sim-id?Ident=BD-17+6422, retrieved 2012-07-16.
- ↑ Rucinski, Slavek M. (October 2002), "The 7.5 Magnitude Limit Sample of Bright Short-Period Binary Stars. I. How Many Contact Binaries Are There?", The Publications of the Astronomical Society of the Pacific 114 (800): 1124–1142, doi:10.1086/342677, Bibcode: 2002PASP..114.1124R.
- ↑ Strohmeier, W. et al. (1965). "Bright Southern BV-Stars". Information Bulletin on Variable Stars 81: 1. Bibcode: 1965IBVS...81....1S. https://konkoly.hu/pub/ibvs/0001/0081.txt.
- ↑ Strohmeier, W. (1966). "BV 449 and BV 600, Two Bright EB-Stars". Information Bulletin on Variable Stars 164: 1. Bibcode: 1966IBVS..164....1S. http://www.konkoly.hu/cgi-bin/IBVS?0164.
External links
 | Original source: https://en.wikipedia.org/wiki/29 Aquarii. Read more |
