Star in the constellation Antlia
UX Antliae is a post-AGB and R Coronae Borealis variable star that has a base apparent magnitude of around 11.85, with irregular dimmings down to below magnitude 18.0.[ 8]
Researchers David Kilkenny and J.E. Westerhuys of the South African Astronomical Observatory confirmed that UX Antliae was an R Coronae Borealis variable in 1990 after noting the similarity of its spectrum to the RCB star W Mensae .[ 9] It had been suspected of being one since 1940, but had been little-studied and exhibited no characteristic declines between 1975 and 1990.[ 4]
Assuming that its absolute magnitude is around -5, it has been estimated as lying 25000 parsecs distant from Earth.[ 4] Kilkenny and Westerhuys noted that its spectrum fit with that of a star of spectral class F, although was deficient in hydrogen.[ 9] It has around 70% the mass of the Sun and an effective (surface) temperature of around 7000 K.[ 7]
See also
References
^ "Download Data" . aavso.org . AAVSO. Retrieved 1 October 2021 .
^ a b c d Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics . 355 : L27. Bibcode :2000A&A...355L..27H . doi :10.1888/0333750888/2862 .
^ Otero, Sebastian (23 November 2012). "UX Antliae" . The International Variable Star Index . Retrieved 14 July 2014 .
^ a b c d e Lawson, W. A.; Cottrell, P. L.; Kilkenny, D.; Gilmore, A. C.; Kilmartin, P. M.; Marang; Roberts; Van Wyk (1994). "The Variability of the R-Coronae Star Ux-Antliae at Maximum Light" . Mon. Not. R. Astron. Soc . 271 (4): 919–23. Bibcode :1994MNRAS.271..919L . doi :10.1093/mnras/271.4.919 .
^ Hema, B. P.; Pandey, Gajendra; Lambert, David L. (2012). "The Galactic R Coronae Borealis Stars: The C2 Swan Bands, the Carbon Problem, and the 12C/13C Ratio". The Astrophysical Journal . 747 (2): 102. arXiv :1201.1357 . Bibcode :2012ApJ...747..102H . doi :10.1088/0004-637X/747/2/102 . S2CID 118653032 .
^ White, Russel J.; Gabor, Jared M.; Hillenbrand, Lynne A. (2007). "High-Dispersion Optical Spectra of Nearby Stars Younger Than the Sun". The Astronomical Journal . 133 (6): 2524. arXiv :0706.0542 . Bibcode :2007AJ....133.2524W . doi :10.1086/514336 . S2CID 122854 .
^ a b c d Stasińska, G.; Szczerba, R.; Schmidt, M.; Siódmiak, N. (2006). "Post-AGB stars as testbeds of nucleosynthesis in AGB stars". Astronomy and Astrophysics . 450 (2): 701. arXiv :astro-ph/0601504 . Bibcode :2006A&A...450..701S . doi :10.1051/0004-6361:20053553 . S2CID 12040452 .
^ Otero, Sebastian (23 November 2012). "V4199 Sgr" . The International Variable Star Index . Retrieved 14 July 2014 .
^ a b Kilkenny, D.; Westerhuys, J. E. (1990). "Spectroscopy of 'RCB' stars-IV. UX ANT". The Observatory . 110 : 90–92. Bibcode :1990Obs...110...90K .
External links
"Post-AGB Object 279.064 +20.120" . www.ncac.torun.pl .
"Light Curve of UX Ant" . www.kusastro.kyoto-u.ac.jp .