Dwarf novae in the Hamburg quasar survey : rarer than expected [PDF]
, 2006 Aims. We report the discovery of five new dwarf novae that were spectroscopically identified in the Hamburg Quasar Survey (HQS),and discuss the properties of the sample of new dwarf novae from the HQS. Methods.
A. Aungwerojwit +29 more
core +1 more source
Beryllium detection in the very fast nova ASASSN-16kt (V407 Lupi) [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 We present high-resolution spectroscopic observations of the fast nova ASASSN-16kt (V407 Lup). A close inspection of spectra obtained at early stages has revealed the presence of low-ionization lines, and among the others we have identified the presence of the ionised $^7$Be doublet in a region relatively free from possible contaminants. After studying
L Izzo +10 more
openaire +9 more sources
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
openaire +2 more sources
On a century of extragalactic novae and the rise of the rapid recurrent novae [PDF]
Advances in Space Research, 2019 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.
M. Darnley, M. Henze
semanticscholar +1 more source
UBVJHKLM Photometry and Low-Resolution Spectroscopy of Nova Delphini 2013 (V339 Del)
Open Astronomy, 2015 We present UBVJHKLM photometric observations of Nova Delphini 2013 that started several hours before maximum light and lasted for 130 nights. Using the obtained data, we derived several photometric parameters of the Nova: the time of maximum light ...
Burlak M. A. +6 more
doaj +1 more source
Shock-powered light curves of luminous red novae as signatures of pre-dynamical mass loss in stellar mergers [PDF]
, 2017 Luminous red novae (LRN) are a class of optical transients believed to originate from the mergers of binary stars, or "common envelope" events. Their light curves often show secondary maxima, which cannot be explained in the previous models of thermal ...
B. Metzger, O. Pejcha
semanticscholar +1 more source
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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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 ...
U. Munari +3 more
openaire +3 more sources
Internal shocks from variable outflows in classical novae [PDF]
Monthly notices of the Royal Astronomical Society, 2019 We present one-dimensional hydrodynamical simulations including radiative losses, of internal shocks in the outflows from classical novae, to explore the role of shocks in powering multiwavelength emission from radio to gamma-ray wavelengths ...
E. Steinberg, B. Metzger
semanticscholar +1 more source
V1494 Aql: Eclipsing Fast Nova with an Unusual Orbital Light Curve [PDF]
Publications of the Astronomical Society of Japan, 2004 Abstract We present the time-resolved photometry of V1494 Aql (Nova Aql 1999 No. 2) between 2001 November and 2003 June. The object is confirmed to be an eclipsing nova with a period of 0.1346138(2) d. The eclipses were present in all observed epochs.
Kato, T. +4 more
openaire +2 more sources