Results 11 to 20 of about 495 (240)

Abundance Analysis of the Extremely Fast ONeMg Novae V838 Herculis and V4160 Sagittarii

open access: yesThe Astrophysical Journal, 2007
V838 Her and V4160 Sgr were two of the fastest classical novae ever observed, exhibiting light curve declines of 2 mag in less than 2 days. Both novae also showed strong neon emission lines, indicative of an outburst occurring on an oxygen-neon-magnesium white dwarf.
Schwarz GJ   +3 more
openaire   +7 more sources

Early post-maximum spectral evolution of the fast novae V4742 Sagittarii and V4743 Sagittarii [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2003
The novae V4742 and V4743 Sagittarii (Sgr) erupted less than a week apart in 2002 September. This paper collects together early IAU Circular observations, plots light curves, and presents our own spectra of these novae. The spectra were collected with equipment commercially available to amateur astronomers. We identify the major spectral emission lines,
G. E. Morgan   +2 more
openaire   +3 more sources

Nova KT Eri 2009: infrared studies of a very fast and small amplitude He/N nova [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2013
We present near-infrared spectroscopic and photometric observations of the nova KT Eridani taken during the first 100 days following its discovery in 2009 November. The JHK spectra of the object have been taken from the Mount Abu Infrared Observatory using the Near-Infrared Imager/Spectrometer.
Raj, Ashish   +2 more
openaire   +2 more sources

Spectral evolution of the extremely fast classical nova V838 Herculis [PDF]

open access: yesAstronomy 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
openaire   +1 more source

Beryllium detection in the very fast nova asassn-16kt (v407 lupi) [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2018
Regular
Izzo, L   +9 more
openaire   +9 more sources

Defining Characteristics of Fast Novae [PDF]

open access: yesInternational 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.
openaire   +1 more source

Low- and Medium-Dispersion Spectropolarimetry of Nova V475 Scuti (Nova Scuti 2003): Discovery of an Asymmetric High-Velocity Wind in a Moderately Fast Nova [PDF]

open access: yesThe Astronomical Journal, 2006
27 pages, 7 figures, accepted for publication in ...
Kawabata, Koji S.   +8 more
openaire   +2 more sources

The peculiar fast nova Herculis 1991

open access: yesThe 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
openaire   +1 more source

M31N 2005-09c: a fast Fe II nova in the disk of M 31 [PDF]

open access: yesAstronomy & 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
openaire   +3 more sources

Properties, evolution and morpho-kinematical modelling of the very fast nova V2672 Oph (Nova Oph 2009), a clone of U Sco [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2010
in press in ...
Munari, U.   +3 more
openaire   +3 more sources

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