V382 Velorum

V382 Velorum, also known as Nova Velorum 1999, was a bright nova which occurred in 1999 in the southern constellation Vela. V382 Velorum reached a brightness of 2.6 magnitude, making it easily visible to the naked eye. It was discovered by Peter Williams of Heathcote, New South Wales, Australia at 09:30 UT on 22 May 1999. Later that same day it was discovered independently at 10:49 UT by Alan C. Gilmore at Mount John University Observatory in New Zealand.[4][5]

V382 Velorum
Location of V382 Velorum (circled in red)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Vela
Right ascension 10h 44m 48.3978s[1]
Declination −52° 25′ 31.1686″[1]
Apparent magnitude (V) 2.8 Max.
16.6 Min.[2]
Characteristics
Variable type Nova[2]
Astrometry
Proper motion (μ) RA: −11.885±0.083[1] mas/yr
Dec.: 2.690±0.079[1] mas/yr
Parallax (π)0.5599 ± 0.0547[1] mas
Distance1800+243
−133[2] pc
Other designations
Nova Vel 1999, AAVSO 1040-51, Gaia DR2 5354475121660180096[3][2]
Database references
SIMBADdata
The light curve of V382 Velorum, plotted from AAVSO data

In its quiescent state, V382 Velorum has a mean visual magnitude of 16.56.[6] It is classified as a fast nova with a smooth light curve.[7][8]

Like all novae, V382 Velorum is a binary system with two stars orbiting so close to each other that one star, the "donor" star, transfers matter to its companion star which is a white dwarf. The orbital period is 3.5 hours.[9] The white dwarf in this system has a mass of 1.23M⊙.[10] V382 Velorum is a neon nova, a relatively rare type of nova with a O-Ne-Mg white dwarf, rather than the more common C-O white dwarf.[11]

The stars forming V382 Velorum are surrounded by a small emission nebula about 10 arc seconds in diameter.[12]

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. Schaefer, Bradley E. (2018). "The distances to Novae as seen by Gaia". Monthly Notices of the Royal Astronomical Society. 481 (3): 3033–3051. arXiv:1809.00180. Bibcode:2018MNRAS.481.3033S. doi:10.1093/mnras/sty2388. S2CID 118925493.
  3. "V382 Velorum". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-08-26.
  4. Shore, SN, et al., in The Astronomical Journal, vol. 125, pp. 1507-1518, March 2003
  5. Williams, P.; Lee, S.; Pearce, A.; Gilmore, A.C.; Pollard, K.R.; McSaveney, J.A.; Kilmartin, P.M.; Caldwell, P. (May 1999). "Nova Velorum 1999". IAU Circular. 7176. Retrieved 7 December 2020.
  6. Platais, Imants; Girard, Terrence M.; Kozhurina-Platais, Vera; Vanaltena, William F.; Jain, Raj K.; Lopez, Carlos E. (February 2000). "Nova Velorum 1999=V382 Vel: Astrometry and Photometry". Publications of the Astronomical Society of the Pacific. 112 (768): 224–227. doi:10.1086/316505. Retrieved 7 December 2020.
  7. Dellavalle, M.; Pasquini, L.; Daou, D.; Williams, R.E. (July 2002). "The evolution of Nova V382 Velorum 1999" (PDF). Astronomy & Astrophysics. 390: 155–166. doi:10.1051/0004-6361:20020611. Retrieved 7 December 2020.
  8. Strope, Richard J.; Schaefer, Bradley E.; Henden, Arne A. (July 2010). "Catalog of 93 Nova Light Curves: Classification and Properties". The Astronomical Journal. 140 (1): 34–62. doi:10.1088/0004-6256/140/1/34. Retrieved 7 December 2020.
  9. Balman, Solen; Retter, Alon; Bos, Marc (May 2006). "The Detection of a 3.5 hr Period in the Classical Nova Velorum 1999 (V382 Vel) and the Long-Term Behavior of the Nova Light Curve". The Astronomical Journal. 131 (5): 2628–2633. arXiv:astro-ph/0601713. doi:10.1086/503161. Retrieved 7 December 2020.
  10. Hachisu, Izumi; Kato, Mariko (June 2019). "A Light-curve Analysis of 32 Recent Galactic Novae: Distances and White Dwarf Masses". The Astrophysical Journal Supplement Series. 242 (2). arXiv:1905.10655. doi:10.3847/1538-4365/ab1b43. Retrieved 7 December 2020.
  11. Hachisu, Izumi; Kato, Mariko (1 January 2016). "Light-curve Analysis of Neon Novae". The Astrophysical Journal. 816 (1). arXiv:1511.06819. doi:10.3847/0004-637X/816/1/26. Retrieved 7 December 2020.
  12. Takeda, Larissa; Marcos, Diaz (May 2019). "Imaging and Analysis of Neon Nova V382 Vel Shell". Publications of the Astronomical Society of the Pacific. 131. doi:10.1088/1538-3873/ab0a47. Retrieved 7 December 2020.
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