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WX Pyxidis

Near-infrared (J band) light curves for WX Pyxidis, showing variation over the white dwarf rotation period (top) and orbital period (bottom). Adapted from Joshi et al. (2011)
Observation data Epoch J2000      Equinox J2000
Constellation	Pyxis
Right ascension	08 33 05.7636
Declination	−22° 48′ 31.981″
Apparent magnitude (V)	16.2 - 17.74
Characteristics
Spectral type	white dwarf + M2
Variable type	Intermediate polar
Astrometry
Proper motion (μ)	RA: −4.627 mas/yr Dec.: 1.378 mas/yr
Parallax (π)	0.5991 ± 0.0851 mas
Distance	1530 pc
Details
White dwarf
Mass	1.4 M☉
Other designations
1E 0830.9-2238
Database references
SIMBAD	data

WX Pyxidis is a cataclysmic variable star system in the constellation Pyxis. Its X-ray emissions were discovered in 1984, after which a visual correlate was searched for. It is classed as an intermediate polar system, composed of a white dwarf and red dwarf with a calculated spectral type of M2V in close orbit around each other and the spin of the degenerate star is such that it does not present the same face to the other star. The degenerate star spins on its axis every 25 minutes. The stars are estimated to take 5.3 hours to orbit each other and the system is 1530 parsecs distant.

References

1. ^ Joshi, V.H.; Ashok, N.M.; Banerjee, D.P.K. (2011). "A study of the near-infrared modulation at spin and orbital periods in the intermediate polar WX Pyx". Bulletin of the Astromical Society of India. 39: 259–75. arXiv:1105.3619. Bibcode:2011BASI...39..259J.
2. ^ Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
3. Samus, N. N.; Kazarovets, E. V.; et al. (2017). "General Catalogue of Variable Stars". Astronomy Reports. 61 (1) (5.1 ed.): 80–88. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085. S2CID 125853869. Retrieved 2019-11-23.
4. Evans, P. A.; Hellier, Coel (2007). "Why do Some Intermediate Polars Show Soft X‐Ray Emission? A Survey of XMM‐Newton Spectra". The Astrophysical Journal. 663 (2): 1277–1284. arXiv:0704.1388. Bibcode:2007ApJ...663.1277E. doi:10.1086/518552. S2CID 16541440.
5. "V* WX Pyx". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 6 September 2015.
6. Schlegel, E. M. (2005). "A serendipitous XMM-Newton observation of the intermediate polar WX Pyx". Astronomy and Astrophysics. 433 (2): 635–39. arXiv:astro-ph/0412431. Bibcode:2005A&A...433..635S. doi:10.1051/0004-6361:20042314. S2CID 261160.

v t e Constellation of Pyxis
List of stars in Pyxis Pyxis in Chinese astronomy
Stars	Bayer α β γ δ ε ζ η θ κ λ Variable T RZ TY UZ VW VY WX XX AK CS HR 3384 3430 3597 HD 73267 77338 Other Gliese 317 Gliese 318
Exoplanets Gliese 317 b HD 73256 b HD 73267 b
Star clusters NGC 2627 Pyxis globular cluster
Nebulae K 1-2 NGC 2818
Galaxies	NGC 2613 2663 Other Hen 2-10
Category

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• Pyxis
• Objects with variable star designations
• Intermediate polars
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