Results 41 to 50 of about 1,255,451 (193)

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

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

Galactic and extragalactic novae - A Review [PDF]

open access: yes, 2018
The outbursts of classical novae are among the strongest explosions in the Universe. The multifrequency observations are contributing to understanding the process of explosions and of the long term evolution. In this review, I discuss the observations of
Poggiani Rosa   +2 more
core   +1 more source

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

Shell Observations of Classical Novae

open access: yes, 2021
We present shell observations of some classical novae from the Turkish National Observatory. We reobserved them to image their faint shells a long time after their outbursts.
SAYGAÇ, AHMET TALAT   +1 more
core  

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