LV Vulpeculae

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LV Vulpeculae
LVVulLocation.png
Location of LV Vulpeculae (circled in red)
Observation data
Epoch J2000       Equinox J2000
Constellation Vulpecula
Right ascension 19h 48m 00.437s [1]
Declination 27° 10 17.36 [1]
Apparent magnitude  (V)4.79 [2] - 16.9 [3]
Characteristics
Variable type Classical Nova
Other designations
Nova Vul 1968 a, AAVSO 1943+26, 2MASS J19480043+2710173 [4]
Database references
SIMBAD data
The light curve of LV Vulpeculae plotted from AAVSO data LVVulLightCurve.png
The light curve of LV Vulpeculae plotted from AAVSO data

LV Vulpeculae, also known as Nova Vulpeculae 1968 no. 1, was the first of two novae in the constellation of Vulpecula which erupted in 1968. It was discovered by George Alcock who observed it from the back garden of his home in Farcet, England, on the morning of 15 April 1968. The next night it was independently discovered by Midtskoven in Norway. [5] [6] It reached a peak apparent magnitude of 4.79 on 17 April 1968. [2] It was visible to the naked eye at the same time HR Delphini (also discovered by George Alcock) was a naked eye object, and the two novae were less than 15 degrees apart on the sky.

Before its eruption, LV Vulpeculae was a magnitude 16.2 object. [7] It is classified as a "fast nova", meaning its brightness declined by more than 3 magnitudes in less than 100 days. [3]

A small emission nebula (shell), a few arc seconds in diameter, has been detected surrounding this nova. However, there are several field stars overlapping the nebula, which makes deriving quantitative information from shell images difficult. [8]

All novae are binary stars, with a "donor" star orbiting a white dwarf. The two stars are so close to each other that matter is transferred from the donor star to the white dwarf. LV Vulpeculae has a carbon-oxygen [9] white dwarf component with an estimated mass of 1.1  M and it is receiving 2×10−9  M per year of material from the donor star. [10]

Distance estimates for LV Vulpeculae vary widely, ranging from 820±50  parsecs [11] to 4,090±220 parsecs. [12]

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<span class="mw-page-title-main">GI Monocerotis</span> 1918 Nova in the constellation Monoceros

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V1370 Aquilae, also known as Nova Aquilae 1982, is a nova that appeared in the constellation Aquila during 1982. It was discovered by Minoru Honda of Kurashiki, Japan at 20:30 UT on 27 January 1982. At that time the Sun had moved just far enough from Aquila to allow the nova to be seen in the morning sky. Although it was discovered photographically, its apparent magnitude was 6–7, making it potentially visible to the naked eye under ideal conditions. A possible magnitude 20 progenitor was located on the Palomar Sky Survey prints. Spectra of the object were taken in February 1982 at Asiago Astrophysical Observatory, which confirmed that it is a nova.

<span class="mw-page-title-main">OY Arae</span> 1910 nova in the constellation Ara

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References

  1. 1 2 Cutri, Roc M.; Skrutskie, Michael F.; Van Dyk, Schuyler D.; Beichman, Charles A.; Carpenter, John M.; Chester, Thomas; Cambresy, Laurent; Evans, Tracey E.; Fowler, John W.; Gizis, John E.; Howard, Elizabeth V.; Huchra, John P.; Jarrett, Thomas H.; Kopan, Eugene L.; Kirkpatrick, J. Davy; Light, Robert M.; Marsh, Kenneth A.; McCallon, Howard L.; Schneider, Stephen E.; Stiening, Rae; Sykes, Matthew J.; Weinberg, Martin D.; Wheaton, William A.; Wheelock, Sherry L.; Zacarias, N. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". CDS/ADC Collection of Electronic Catalogues. 2246: II/246. Bibcode:2003yCat.2246....0C.
  2. 1 2 Tempesti, P. (August 1972). "Photoelectric light curve of nova Vulpeculae 1968 N. 1". Astronomy and Astrophysics. 20: 63. Bibcode:1972A&A....20...63T.
  3. 1 2 Duerbeck, Hilmar W. (March 1987). "A Reference Catalogue and Atlas of Galactic Novae". Space Science Reviews. 45 (1–2): 1–14. Bibcode:1987SSRv...45....1D. doi:10.1007/BF00187826. S2CID   115854775.
  4. "LV Vul". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2020-12-15.
  5. Mayall, M.W. (1968). "Variable Star Notes- The Novae of 1967-1968". Journal of the Royal Astronomical Society of Canada. 62: 201. Bibcode:1968JRASC..62..201M.
  6. Mobberley, M. (1999). "Novae". Journal of the British Astronomical Association. 109: 57. Bibcode:1999JBAA..109...57M.
  7. Collazzi, Andrew C.; Schaefer, Bradley E.; Xiao, Limin; Pagnotta, Ashley; Kroll, Peter; Lochel, Klaus; Henden, Arne A. (December 2009). "The Behavior of Novae Light Curves Before Eruption". The Astronomical Journal. 138 (6): 1846–1873. arXiv: 0909.4289 . Bibcode:2009AJ....138.1846C. doi:10.1088/0004-6256/138/6/1846. S2CID   14597316.
  8. Slavin, A.J.; O'Brien, T.J.; Dunlop, J.S. (September 1995). "A deep optical imaging study of the nebular remnants of classical novae". Monthly Notices of the Royal Astronomical Society. 276 (2): 353–371. Bibcode:1995MNRAS.276..353S. doi: 10.1093/mnras/276.2.353 .
  9. 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): 18. arXiv: 1905.10655 . Bibcode:2019ApJS..242...18H. doi: 10.3847/1538-4365/ab1b43 . S2CID   166228785.
  10. Shara, Michael M.; Prialnik, Dina; Hillman, Yael; Kovetz, Attay (June 2018). "The Masses and Accretion Rates of White Dwarfs in Classical and Recurrent Novae". The Astrophysical Journal. 860 (2): 110. arXiv: 1804.06880 . Bibcode:2018ApJ...860..110S. doi: 10.3847/1538-4357/aabfbd . S2CID   55851634.
  11. Duerbeck, H.W. (April 1981). "Light curve types, absolute magnitudes, and physical properties of galactic novae". Publications of the Astronomical Society of the Pacific. 93: 165–175. Bibcode:1981PASP...93..165D. doi: 10.1086/130799 . S2CID   121397724.
  12. Özdönmez, Aykut; Güver, Tolga; Cabrera-Lavers, Antonio; Ak, Tansel (September 2016). "The distances of the Galactic novae". Monthly Notices of the Royal Astronomical Society. 461 (2): 1177–1201. arXiv: 1606.01907 . Bibcode:2016MNRAS.461.1177O. doi:10.1093/mnras/stw1362. S2CID   118589678.