Results 141 to 150 of about 493,128 (267)

An Extended Grid of Nova Models. III. Very Luminous, Red Novae

, 2010
Extremely luminous, red eruptive variables like RV in M31 are being suggested as exemplars of a new class of astrophysical object. Our greatly extended series of nova simulations shows that classical nova models can produce very red, luminous eruptions ...
Abell, Afsar, Attay Kovetz, Bond, Corradi, Couderc, David Zurek, Dina Prialnik, Duerbeck, Ferguson, Ferrarese, Gill, Goranskij, Harwit, Kasliwal, Kimeswenger, Kovetz, Lepine, Lynch, Martini, McKibben, Michael M. Shara, Neill, Ofek, Ofer Yaron, Payne-Gaposchkin, Prialnik, Prialnik, Rau, Schwartzman, Shara, Shara, Shara, Soker, Warner, Williams, Wisniewski, Yaron, Zwitter   +38 more
core   +1 more source

Badania kariologiczne brzozy ojcowskiej i jej potomstwa [Karyological studies on Betula oycoviensis Besser and its progeny]

Acta Societatis Botanicorum Poloniae, 2015
In the progeny of Betula oycoviensis pollinated with the pollen of Betula oycoviensis three groups were distinguished: oycovlensis type, verrucosa type, and „nova" type (a small dwarf birch). The number of chromosomes determined in the parental specimens
A. Szwabowicz
doaj   +1 more source

V1504 CYG: OUTBURSTS

Odessa Astronomical Publications, 2007
The behavior of the dwarf nova V1504 Cyg during 2007 superoutburst and during several normal outbursts is considered. The binary during normal outbursts shows loop-like tracks on the V, V-R diagram, where prior the superoutburst the loop is steep and ...
E. P. Pavlenko, E. Berezina
doaj   +1 more source

HS 2325+8205 - an ideal laboratory for accretion disk physics

, 2012
We identify HS 2325+8205 as an eclipsing, frequently outbursting dwarf nova with an orbital period of 279.841731(5) min. Spectroscopic observations are used to derive the radial velocity curve of the secondary star from absorption features and also from ...
A. Aungwerojwit, B. Staels, B. T. Gänsicke, Bailey J., Beuermann K., Beuermann K., Bruch A., D. Boyd, Dhillon V. S., G. Poyner, Hagen H.-J., Horne K., I. Miller, J. Casares, J. Pietz, J. R. Thorstensen, Marsh T. R., P. Rodríguez-Gil, R. D. G. Hickman, S. Brady, S. Pyrzas, T. R. Marsh, Wood J., Y. Ögmen   +23 more
core   +1 more source

Multidimensional Nova Simulations with an Extended Buffer and Lower Initial Mixing Temperatures

The Open Journal of Astrophysics
A classical nova is a thermonuclear runaway initiated on a white dwarf accreting solar-like material from its stellar companion. Once the white dwarf accretes enough mass, the pressure at the base of the accreted layer reaches a critical point, leading ...
Alexander Smith Clark, Michael Zingale
doaj   +1 more source

A Composite Light Curve Model of the Symbiotic Nova PU Vul (1979)

Open Astronomy, 2012
PU Vul (1979) is a symbiotic nova that shows a long-lasting flat optical peak followed by a slow decline. We made a quasi-evolution model for outbursts on a 0.6 M⊙ white dwarf consisting of a series of static solutions with optically-thin winds.
Kato M., Mikołajewska J., Hachisu I.
doaj   +1 more source

Dwarf Nova Oscillations: New Results

, 2001
New and archived observations of VW Hyi in outburst show the occasional presence of optical Dwarf Nova Oscillations (DNOs) over the range of 18 - 40 s. There is a rapid increase in period near the end of outburst, at the same time that the EUV falls almost to zero, which we attribute to propellering. The DNOs return to a shorter period after this phase,
Warner, Brian, Woudt, Patrick
openaire   +2 more sources

Modeling the High-brightness State of the Recurrent Nova T CrB as an Enhanced Mass-transfer Event

The Astrophysical Journal
T Coronae Borealis is the nearest symbiotic recurrent nova. Twice in the last two centuries, in 1866 and 1946, the accreted material ignited on the surface of the white dwarf via runaway thermonuclear fusion reactions and produced a nova eruption.
Wagner Schlindwein, Raymundo Baptista, Gerardo Juan Manuel Luna   +2 more
doaj   +1 more source

Study of astrophysically important resonant states in 30 S using the 32S(p,t)30 S reaction

EPJ Web of Conferences, 2010
A small fraction (< 1%) of presolar SiC grains is suggested to have been formed in the ejecta of classical novae. The 29P(p,γ)30S reaction plays an important role in understanding the Si isotopic abundances in such grains, which in turn provide us ...
Wrede C., Lennard W.N., Parker P.D., Deibel C., Kahl D., Chen J., Clark J.A., Setoodehnia K., Chen A.A.   +8 more
doaj   +1 more source

Is T Leonis a superoutbursting intermediate polar?

, 2004
We present an XMM-Newton analysis of the cataclysmic variable T Leo. The X-ray light curve shows sinusoidal variation on a period P_x equal to 0.89^{+0.14}_{-0.10} times the previously spectroscopically determined orbital period.
Abbott, Belle, Homer, Howell, J. H. M. M. Schmitt, J.-U. Ness, Kato, Kato, Kato, Kato, Kemp, Lemm, Mahasena, Meyer, Middleditch, Ness, Remillard, Richman, Robertson, Robinson, Rosen, S. Vrielmann, Schulz, Schwarz, Shafter, Shafter, Szkody, Szkody, Thorstensen, Tovmassian, van Teeseling, Warner, Warner, Wood   +33 more
core   +1 more source