DK Lacertae

DK Lacertae
Observation data
Epoch J2000      Equinox J2000
Constellation Horologium
Right ascension 22h 49m 46.93149s[1]
Declination +53° 17′ 19.7993″[1]
Apparent magnitude (V) 5.0 – 15.5[2] (var.)
Characteristics
Variable type Nova[2]
Astrometry
Proper motion (μ) RA: −1.945[1] mas/yr
Dec.: −1.722[1] mas/yr
Parallax (π)0.4026 ± 0.0697[1] mas
Distanceapprox. 8,000 ly
(approx. 2,500 pc)
Details
DK Lac B
Mass1.03[3] M☉
Other designations
Nova Lacertae 1950, DK Lac, 2MASS J22494690+5317192[4]
Database references
SIMBADdata

DK Lacertae (Nova Lacertae 1950) was a nova, which lit up in the constellation Lacerta in 1950. DK Lacertae reached peak magnitude 5.0.[2] It declined in brightness at a moderately fast rate, while showing luminosity variations. A faint shell was detected around the source in 1995, showing a radius of about 2.0″–2.5″.[5] X-ray emission has been detected from this system.[6]

References

  1. 1 2 3 4 5 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.
  2. 1 2 3 Samus', N. N; Kazarovets, E. V; Durlevich, O. V; Kireeva, N. N; Pastukhova, E. N (2017), "General catalogue of variable stars: Version GCVS 5.1", Astronomy Reports, 61 (1): 80, Bibcode:2017ARep...61...80S, doi:10.1134/S1063772917010085.
  3. ↑ Shara, Michael M.; et al. (June 2018), "The Masses and Accretion Rates of White Dwarfs in Classical and Recurrent Novae", The Astrophysical Journal, 860 (2): 11, arXiv:1804.06880, Bibcode:2018ApJ...860..110S, doi:10.3847/1538-4357/aabfbd, 110.
  4. ↑ "DK Lac". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 3 September 2018.
  5. ↑ Gill, C. D.; O'Brien, T. J. (May 2000), "Hubble Space Telescope imaging and ground-based spectroscopy of old nova shells - I. FH Ser, V533 Her, BT Mon, DK Lac and V476 Cyg", Monthly Notices of the Royal Astronomical Society, 314 (1): 175–182, arXiv:astro-ph/0001092, Bibcode:2000MNRAS.314..175G, doi:10.1046/j.1365-8711.2000.03342.x.
  6. ↑ Boardman, S. F.; et al. (January 2016), "X-ray detection of the old nova DK Lacertae", The Astronomer's Telegram, 8610, Bibcode:2016ATel.8610....1B.
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