Z Camelopardalis

Z Camelopardalis (Z Cam) is a cataclysmic variable star[4] in the constellation of Camelopardalis. It has an apparent visual magnitude which varies between 10.0 and 14.5. It is the prototype star for the family of Z Camelopardalis variable stars, dwarf novae with standstills at a brightness intermediate between their maxima and minima.[2]

Z Camelopardalis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Camelopardalis
Right ascension  08h 25m 13.199s[1]
Declination +73° 06′ 39.28″[1]
Apparent magnitude (V) 10.0 to 14.5[2]
Characteristics
Evolutionary stage pec(UG)+G1[2]
Variable type UGZ[2]
Astrometry
Radial velocity (Rv)−38.0[3] km/s
Proper motion (μ) RA: −9.003[1] mas/yr
Dec.: −19.078[1] mas/yr
Parallax (π)4.4369 ± 0.0403[1] mas
Distance735 ± 7 ly
(225 ± 2 pc)
Other designations
Z Cam, 2MASS J08251318+7306391, AAVSO 0814+73
Database references
SIMBADdata

Z Camelopardalis was discovered photographically in 1904 by Henry Park Hollis during work for the Astrographic Catalogue.[5] It is surrounded by an extensive shell thought to have been ejected in a nova explosion.[6]

  • Z Camelopardalis light curve showing a characteristic standstill interrupting the otherwise regular eruptions
  • Gas shell Around Z Camelopardalis
  • Z Camelopardalis in ultraviolet

References
  1. 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.
  2. Z Cam, database entry, The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line November 19, 2009.
  3. Duflot, M.; Figon, P.; Meyssonnier, N. (1995). "Vitesses radiales. Catalogue WEB: Wilson Evans Batten. Subtittle: Radial velocities: The Wilson-Evans-Batten catalogue". Astronomy and Astrophysics Supplement Series. 114: 269. Bibcode:1995A&AS..114..269D.
  4. SIMBAD, "Z Camelopardalis" (accessed 2012-03-20)
  5. "New Variable Stars found on the Astrographic Plates at the Royal Observatory, Greenwich". Monthly Notices of the Royal Astronomical Society. 64 (9): 837–838. 1904. Bibcode:1904MNRAS..64..837.. doi:10.1093/mnras/64.9.837.
  6. Shara, Michael M; Martin, Christopher D; Seibert, Mark; Rich, R. Michael; Salim, Samir; Reitzel, David; Schiminovich, David; Deliyannis, Constantine P; Sarrazine, Angela R; Kulkarni, Shri R; Ofek, Eran O; Brosch, Noah; Lépine, Sebastien; Zurek, David; De Marco, Orsola; Jacoby, George (2007). "An ancient nova shell around the dwarf nova Z Camelopardalis". Nature. 446 (7132): 159–162. Bibcode:2007Natur.446..159S. doi:10.1038/nature05576. PMID 17344847.


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