Results 31 to 40 of about 1,204,542 (190)

Symbiotic Star T CrB as an Extreme SU UMa–type Dwarf Nova

open access: yesThe Astrophysical Journal Letters, 2023
T CrB is a symbiotic recurrent nova that exhibits quiescent and active phases between its classical nova eruptions. The statistical properties of these active phases have been poorly studied thus far. Because of that their nature remained unknown.
Krystian Iłkiewicz   +2 more
doaj   +1 more source

Hard Emission from Classical Novae [PDF]

open access: yes, 1992
The thermonuclear model of classical novae has been very successful in explaining many observed features of novae. It also predicts unique gamma-ray and X-ray signatures, a few of which possibly have already been observed. We describe recent developments
Leising, Mark D
core   +1 more source

Classical novae in the ASKAP pilot surveys

open access: yesPublications of the Astronomical Society of Australia, 2023
Abstract We present a systematic search for radio counterparts of novae using the Australian Square Kilometer Array Pathfinder (ASKAP). Our search used the Rapid ASKAP Continuum Survey, which covered the entire sky south of declination $+41^{\circ}$ ( $\sim$ $34000$
Ashna Gulati   +9 more
openaire   +2 more sources

When a Nova Becomes Old

open access: yesActa Polytechnica CTU Proceedings, 2015
Here we present the preliminary results of a project aimed at unveiling the nature of classical novae decades after their eruption. The ultimate goal of this project is to describe the population of cataclysmic variables which give rise to nova ...
A. Ederoclite   +3 more
doaj   +1 more source

Formation of CN and CO Molecules in the Envelope of Nova V1391 Cas During the Near-maximum Phase

open access: yesThe Astronomical Journal
Moderate-resolution spectra ( R ≈ 2700) of the classical nova V1391 Cas were obtained in the near-infrared wavelength range of 0.95–2.45 μ m on UT 2020 August 14.41 using the Keck II telescope and the NIRES spectrograph.
Hideyo Kawakita, James E. Lyke
doaj   +1 more source

Time-Dependent Dust Formation in Novae [PDF]

open access: yesJournal of Astronomy and Space Sciences, 1991
The dust formation processes in novae are investigated with close attention to recent infrared observations. Using mainly the classical nucleation theory, we have calculated the time scales of dust formation and growth in the environments of novae. Those
Kyung-Won Suh
doaj  

On the Light Curves of Disk and Bulge Novae

open access: yesThe Astrophysical Journal
We examine the light curves of a sample of novae, classifying them into single-peaked and multiple-peaked morphologies. Using accurate distances from Gaia, we determine the spatial distribution of these novae by computing their heights, Z , above the ...
Asaf Cohen   +6 more
doaj   +1 more source

Impact of Thermonuclear Reaction Rate Uncertainties on the Identification of Presolar Grains from Classical Novae

open access: yesThe Astrophysical Journal
Approximately 30%–40% of classical novae generate dust between 20 and 100 days following the eruption. However, there has yet to be a definitive identification of presolar stardust grains originating from classical novae.
Lauren Ward   +5 more
doaj   +1 more source

The Rise of Nova V1674 Herculis

open access: yesThe Astrophysical Journal
Observational constraints on classical novae are heavily biased to phases near optical peak and later because of the simple fact that novae are not typically discovered until they become bright. The earliest phases of brightening, coming before discovery,
Robert M. Quimby   +5 more
doaj   +1 more source

Fully Self-consistent Nova Explosion Models Reproducing Light Curves of KT Eri, V339 Del, V597 Pup, and SMC NOVA 2016-10a

open access: yesThe Astrophysical Journal
The rising phase toward the optical maximum of a classical nova is one of the last frontiers of nova study. Constructing free–free emission model light curves based on our fully self-consistent nova explosion models, we present several theoretical light ...
Mariko Kato   +2 more
doaj   +1 more source

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