Results 11 to 20 of about 334 (263)
THE NOVA SHELL AND EVOLUTION OF THE RECURRENT NOVA T PYXIDIS [PDF]
The Astrophysical Journal, 2009 T Pyxidis is the prototypical recurrent nova (RN) with a mysterious nova shell. We report new observations of the shell with HST. The knots in the shell are expanding with velocities 500-715 km/s, for a distance of 3500 pc. The fractional expansion of the knots is constant, and this implies no significant deceleration.
Schaefer, Bradley E. +2 more
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Theory of Nova Outbursts and Type Ia Supernovae
Acta Polytechnica CTU Proceedings, 2015 We briefly review the current theoretical understanding of the light curves of novae. These curves exhibit a homologous nature, dubbed the universal decline law, and when time-normalized, they almost follow a single curve independently of the white dwarf
M. Kato, I. Hachisu
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International Astronomical Union Colloquium, 1990 AbstractThermonuclear models of recurrent novae demand white dwarf accretors near the Chandrasekhar mass. In this case, the known recurrent novae should possess classical counterparts bearing the same structural parameters and space distribution, save for having only marginally less massive white dwarfs.
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Odessa Astronomical Publications, 2007 The WZ Sge type stars is a rare subclass of the cataclysmic variables (CVs). It possesses the properties of both dwarf novae and recurrent novae. The WZ Sge stars have the shortest orbital periods (typically 80 - 90 minutes) known among the dwarf novae ...
E. P. Pavlenko
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Evidence for Multiple Shocks from the γ-Ray Emission of RS Ophiuchi
The Astrophysical Journal, 2023 In 2021 August, the Fermi Large Area Telescope, H.E.S.S., and MAGIC detected GeV and TeV γ -ray emission from an outburst of recurrent nova RS Ophiuchi. This detection represents the first very high-energy γ -rays observed from a nova, and it opens a new
Rebecca Diesing +6 more
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The nova KT Eri Is a recurrent nova with a recurrence time-scale of 40–50 yr
Monthly Notices of the Royal Astronomical Society, 2022 ABSTRACT KT Eridani was a very fast nova in 2009 peaking at V = 5.42 mag. We marshal large data sets of photometry to finally work out the nature of KT Eri. From the TESS light curve, as confirmed with our radial velocity curve, we find an orbital period of 2.61595 d.
Bradley E Schaefer +3 more
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Recurrence of Nova Explosions [PDF]
International Astronomical Union Colloquium, 1979 It has been shown by many computations that a nova explosion is triggered by mass accretion onto a white dwarf in a close binary system. Such nova explosions will recur many times in the following way. When a certain amount of hydrogen-rich gas has been accreted on the white dwarf, a hydrogen-shell flash is ignited.
Kyoji Nariai, Ken’ichi Nomoto
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Lepto-hadronic Interpretation of 2021 RS Ophiuchi Nova Outburst
The Astrophysical Journal, 2023 Very-high-energy (VHE; 100 GeV < E ≤ 100 TeV) and high-energy (HE; 100 MeV < E ≤ 100 GeV) gamma rays were observed from the symbiotic recurrent nova RS Ophiuchi (RS Oph) during its outburst in 2021 August by various observatories, such as the High Energy
Agnibha De Sarkar +4 more
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International Astronomical Union Colloquium, 1988 AbstractAn examination of the existing observational material on all the objects classified as recurrent novae, reveals that only T Pyx, U Sco, T CrB and RS Oph deserve such a classification. We review the properties of outbursts powered by thermonuclear runaways and accretion events and determine their observational consequences.
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On a century of extragalactic novae and the rise of the rapid recurrent novae [PDF]
Advances in Space Research, 2020 Novae are the observable outcome of a transient thermonuclear runaway on the surface of an accreting white dwarf in a close binary system. Their high peak luminosity renders them visible in galaxies out beyond the distance of the Virgo Cluster. Over the past century, surveys of extragalactic novae, particularly within the nearby Andromeda Galaxy, have ...
Darnley, MJ, Henze, M
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