Results 31 to 40 of about 270 (168)
Publications of the Astronomical Society of Japan, 2015 AbstractWe have summarized the current understanding and recently obtained findings about WZ Sge-type dwarf novae. We also reviewed the historical development of the understanding of these objects, provided the modern criteria, and reviewed the past research in relation to superhumps, early superhumps, and the outburst mechanism. We regard the presence
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Helium-deficient ER UMa-type Dwarf Nova below the Period Minimum with a Hot Secondary
The Astrophysical JournalWe present the discovery of a peculiar dwarf nova KSP-OT-201712a using high-cadence, multicolor observations made with the Korea Microlensing Telescope Network.
Youngdae Lee +4 more
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The Kukarkin-Parenago Relation for Dwarf Novae and Novae [PDF]
Astrophysics and Space Science, 1987 AbstractThe period-amplitude relation and the period-energy relation for dwarf novae and novae are discussed. The total outbursts energy is shown to be a more suitable characteristic of the outburst than its amplitude.
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A SPOT STRUCTURE OF ACCRETION DISK OF U GEMINORUM
Odessa Astronomical Publications, 2017 On the basis of modelling of emission lines of dwarf novae U Gem, conclusion is made, that the observed orbital phase change of model parameters of a accretion disk can not be explained in frameworks of Keplerian velocity field in a disk.
N. V. Borisov, V. V. Neustroev
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The Astrophysical JournalWe present 120 s cadence TESS observations of three superoutbursts of the SU UMa-type dwarf nova VW Hydri. Two events (SO2 in Sectors 87+88 and SO3 in Sector 93) exhibit a temporally pronounced precursor dip followed by a rapid rise into the main ...
Bisi Bernard Ogunwale +4 more
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The Accreting White Dwarfs in Cataclysmic Variables
Galaxies, 2022 Accreting white dwarfs (WDs) in cataclysmic variables (CVs) provide crucial insights about the accretion of mass and angular momentum in all types of binaries, including accreting NSs and BHs.
Edward M. Sion, Patrick Godon
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POSITIVE AND NEGATIVE SUPERHUMPS OF THE DWARF NOVA MN DRA
Odessa Astronomical Publications, 2010 We present the result of O–C analysis of the dwarf nova MN Dra. It is based on the multi-site photometric observations that were made over 77 nights in August – November, 2009. The total exposure was 433 hours.
D. A. Samsonov +9 more
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NON-THERMAL EMISSION FROM CATACLYSMIC VARIABLES: IMPLICATIONS ON ASTROPARTICLE PHYSICS
Acta Polytechnica, 2013 We review the lines of evidence that some cataclysmic variables (CVs) are the sources of non-thermal radiation. It was really observed in some dwarf novae in outburst, a novalike CV in the high state, an intermediate polar, polars, and classical novae ...
Vojtech Šimon
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Outburst Properties of V1504 Cyg and V344 Lyr
Acta Polytechnica CTU Proceedings, 2015 I begin by reviewing dwarf novae and the disk instability theory, and then present an overview of three ideas for producing superoutbursts in the SU UMa stars − the thermal tidal instability, irradiation-induced secondary mass overflow, and the plain ...
J. K. Cannizzo
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Novae: An Important Source of Lithium in the Galaxy
The Astrophysical JournalThe source of the Galactic lithium (Li) has long been a puzzle. With the discovery of Li in novae, extensive research has been conducted. However, there still exists a significant disparity between the observed abundance of Li in novae and the existing ...
Jun Gao +6 more
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