Results 21 to 30 of about 14,518 (263)
Quark-Novae in the outskirts of galaxies: an explanation of the fast radio burst phenomenon [PDF]
Monthly Notices of the Royal Astronomical Society, 2020 ABSTRACT We show that old isolated neutron stars in groups and clusters of galaxies experiencing a Quark-Nova phase (QN: an explosive transition to a quark star) may be the source of fast radio bursts (FRBs). Each of the millions of fragments of the ultrarelativistic QN ejecta provides a collisionless plasma for which the ambient medium (
Rachid Ouyed, Denis Leahy, Nico Koning
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M31N 2005-09c: a fast Fe II nova in the disk of M 31 [PDF]
Astronomy & Astrophysics, 2007 Classical novae are quite frequent in M~31. However, very few spectra of M31 novae have been studied to date, especially during the early decline phase. Our aim is to study the photometric and spectral evolution of a M31 nova event close to outburst. We present photometric and spectroscopic observations of M31N 2005-09c, a classical nova in the disk of
Hatzidimitriou, D. +5 more
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Defining Characteristics of Fast Novae [PDF]
International Astronomical Union Colloquium, 1979 Scrutiny of the light curves of the common novae yields important clues concerning both the nature of the nova outburst and the characteristics of the underlying white dwarfs. Ultraviolet and infrared observations have served to make available essentially complete bolometric light curves for several recent novae.
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A NuSTAR observation of the fast symbiotic nova V745 Sco in outburst [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2015 Abstract The fast recurrent nova V745 Sco was observed in the 3–79 keV X-rays band with NuSTAR 10 d after the optical discovery. The measured X-ray emission is consistent with a collisionally ionized optically thin plasma at temperature of about 2.7 keV.
Orio, M. +4 more
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The peculiar fast nova Herculis 1991
The Astrophysical Journal, 1992 Unlike previously observed fast novae, the temporal evolution of Nova Her 1991 is similar to slower, dusty novae in which the appearance of thermal infrared emission from condensing dust was coincident with a transition in the visible light curve. However, the total luminosity radiated by Nova Her 1991 in the infrared was only ∼5% of the outburst ...
Charles E. Woodward +3 more
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Discovery of a probable very fast extragalactic nova in a symbiotic binary
Astronomy & Astrophysics, 2022 Very fast novae are novae that evolve exceptionally quickly (on timescales of only days). Due to their rapid evolution, very fast novae are challenging to detect and study, especially at early times. Here we report the discovery, made as part of our Transient UV Objects project, of a probable very fast nova in the nearby spiral galaxy NGC 300.
Modiano, D., Wijnands, R.
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Beryllium detection in the very fast nova asassn-16kt (v407 lupi) [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 Regular
Izzo, L +9 more
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V2676 Oph: Estimating physical parameters of a moderately fast nova
Acta Astronomica, 2018 Using our previously reported observations, we derive some physical parameters of the moderately fast nova V2676 Ophiuchi 2012 # 1. The best-fit CLOUDY model of the nebular spectrum obtained on 2015 May 8 shows a hot white dwarf source with Tbb = 1.0 x 10^{5} K having a luminosity of 1.0 x 10^{38} ergs/s.
Raj, A. +4 more
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Properties, evolution and morpho-kinematical modelling of the very fast nova V2672 Oph (Nova Oph 2009), a clone of U Sco [PDF]
Monthly Notices of the Royal Astronomical Society, 2010 in press in ...
Munari, U. +3 more
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Spectral evolution of the extremely fast classical nova V838 Herculis [PDF]
Astronomy and Astrophysics, 2010 Spectral evolution of nova V838 Her 1991 was monitored at Asiago Astrophysical Observatory from 1991 March 31 to July 2. The spectra in the early decline stage showed emission lines of H I, He I, He II, N II, N III, C II, C III, C IV, Si II, [S III], [Ne III], and Fe II, where some identifications are different from those reported in the previous works.
T. Iijima, A. Cassatella
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