Results 31 to 40 of about 125,367 (265)
A Light-curve Analysis of 32 Recent Galactic Novae: Distances and White Dwarf Masses [PDF]
Astrophysical Journal Supplement Series, 2019 We obtained the absolute magnitudes, distances, and white dwarf (WD) masses of 32 recent galactic novae based on the time-stretching method for nova light curves.
I. Hachisu, M. Kato
semanticscholar +1 more source
International Astronomical Union Colloquium, 1995 AbstractThis report provides a summary of flares observed visually in the dwarf novae V442 Cen, OY Car, TU Men and Z Cha. The flares precede an outburst by an average of around ten days.
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Theoretical Light-curve Models of the Symbiotic Nova CN Cha—Optical Flat Peak for 3 Yr
The Astrophysical Journal, 2023 CN Cha is a slow symbiotic nova characterized by a 3 yr long optical flat peak followed by a rapid decline. We present theoretical light curves for CN Cha, based on hydrostatic approximation, and estimate the white-dwarf (WD) mass to be ∼0.6 M _☉ for a ...
Mariko Kato, Izumi Hachisu
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Theory of Nova Outbursts and Type Ia Supernovae
Acta Polytechnica CTU Proceedings, 2015 We briefly review the current theoretical understanding of the light curves of novae. These curves exhibit a homologous nature, dubbed the universal decline law, and when time-normalized, they almost follow a single curve independently of the white dwarf
M. Kato, I. Hachisu
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Two-dimensional simulations of mixing in classical novae: The effect of white dwarf composition and mass [PDF]
Astronomy & Astrophysics, 2018 Context. Classical novae are explosive phenomena that take place in stellar binary systems. They are powered by mass transfer from a low-mass main sequence star onto either a CO or ONe white dwarf.
J. Casanova, J. José, S. Shore
semanticscholar +1 more source
Radiation from dwarf nova discs
Physics Reports, 1999 We use the Shaviv and Wehrse (1991) code to model the vertical structure and the emission properties of quiescent dwarf nova discs. We find that in the case of HT Cas the quiescent disc must be optically thin, in contradiction with the requirements of the standard disc instability model. We find a viscosity parameter alpha > 1. Although this is much
Idan, Irit +3 more
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Dwarf nova outbursts with magnetorotational turbulence [PDF]
Monthly Notices of the Royal Astronomical Society, 2016 19 pages, 14 figures, 2 tables, accepted for publication in ...
Coleman, M. S. B. +4 more
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OGLE-BLG504.12.201843: a possible extreme dwarf nova
Monthly Notices of the Royal Astronomical Society, 2022 ABSTRACT We present the analysis of existing optical photometry and new optical spectroscopy of the candidate cataclysmic variable star OGLE-BLG504.12.201843. As was shown previously, this object has an orbital period of 0.523419 d and exhibits year-long outbursts with a mean period of 973 d.
Camille Landri +7 more
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The Relationship Between X-ray Luminosity and Duty Cycle for Dwarf Novae and their Specific Frequency in the Inner Galaxy [PDF]
, 2015 We measure the duty cycles for an existing sample of well-observed, nearby dwarf novae (DNe) using data from American Association of Variable Star Observers, and present a quantitative empirical relation between the duty cycle of DNe outbursts and the X ...
C. Britt +15 more
semanticscholar +1 more source
MULTI-FREQUENCY STUDY OF SYMBIOTIC NOVAE
Odessa Astronomical Publications, 2017 Symbiotic novae are subclass of symbiotic stars - interacting binaries with wide orbits, whose photometric history is characterized by a single nova- like outburst lasting decades and caused by a thermonuclear runaway on the surface of a wind accreting ...
D. Chochol, T. Pribulla
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