Results 91 to 100 of about 86,009 (222)

The Shape of Long Outbursts in U Gem Type Dwarf Novae from AAVSO Data [PDF]

, 2012
We search the American Association of Variable Star Observers (AAVSO) archives of the two best studied dwarf novae in an attempt to find light curves for long out bursts that are extremely well-characterized. The systems are U Gem and S8 Cyg. Our goal is
Cannizzo, John K.
core  

Millinovae: A New Class of Transient Supersoft X-Ray Sources without a Classical Nova Eruption

The Astrophysical Journal Letters
Some accreting binary systems containing a white dwarf (such as classical novae or persistent supersoft sources) are seen to emit low-energy X-rays with temperatures of  ∼ 10 ^6 K and luminosities exceeding 10 ^35 erg s ^−1 .
Przemek Mróz, Krzysztof Król, Hélène Szegedi, Philip Charles, Kim L. Page, Andrzej Udalski, David A. H. Buckley, Gulab Dewangan, Pieter Meintjes, Michał K. Szymański, Igor Soszyński, Paweł Pietrukowicz, Szymon Kozłowski, Radosław Poleski, Jan Skowron, Krzysztof Ulaczyk, Mariusz Gromadzki, Krzysztof Rybicki, Patryk Iwanek, Marcin Wrona, Mateusz J. Mróz   +20 more
doaj   +1 more source

Models for the soft X-ray emission of post-outburst classical novae

, 2005
We developed a hydrostatic and stationary white dwarf envelope model for the study of the post-outburst phases of classical novae and their soft X-ray emission.
M. Hernanz, G. Sala
core   +1 more source

Observations of Five Southern-hemisphere Cataclysmic Binary Stars

The Astronomical Journal
We present observations and analyses of five little-studied cataclysmic binary stars in the southern celestial hemisphere. Our new observations are from the South African Astronomical Observatory.
John R. Thorstensen, Annabelle E. Niblett, Shreya Gandhi, Lauren P. Zanarini, Gavin D. Goss, Arnav Singh, Divik Verma, Ryan C. Hickox, Emmanuel A. Durodola, Jiaqi Martin Ying   +9 more
doaj   +1 more source

X-Ray Spectroscopy Mass Constraints on V1674 Her: The Fastest Nova does not have a Near-Chandrasekhar White Dwarf

The Astrophysical Journal
V1674 Her (Nova Her 2021) is the fastest classical nova ever recorded, with an optical decline time of t _2  ∼ 1 day, typically interpreted as evidence for a white dwarf mass close to the Chandrasekhar limit.
Tekeba Olbemo, Manel Errando, Andrea Gokus   +2 more
doaj   +1 more source

Spectroscopic Identification and Population Properties of Cataclysmic Variables from DESI DR1

The Astrophysical Journal Supplement Series
We present a systematic search for cataclysmic variables (CVs) using spectroscopic data from Data Release 1 of the Dark Energy Spectroscopic Instrument. Applying the Bagging-TopPush algorithm, we identified 433 CV candidates and related objects, of which
Wen Hou, Jia-Mao Lin, A-Li Luo, Zhi-Bin Dai, Yi-Qiao Dong, Shu-Guo Ma   +5 more
doaj   +1 more source

Search for ²²Na in novae supported by a novel method for measuring femtosecond nuclear lifetimes. [PDF]

Nat Commun, 2023
Fougères C, de Oliveira Santos F, José J, Michelagnoli C, Clément E, Kim YH, Lemasson A, Guimarães V, Barrientos D, Bemmerer D, Benzoni G, Boston AJ, Böttger R, Boulay F, Bracco A, Čeliković I, Cederwall B, Ciemala M, Delafosse C, Domingo-Pardo C, Dudouet J, Eberth J, Fülöp Z, González V, Gottardo A, Goupil J, Hess H, Jungclaus A, Kaşkaş A, Korichi A, Lenzi SM, Leoni S, Li H, Ljungvall J, Lopez-Martens A, Menegazzo R, Mengoni D, Million B, Mrázek J, Napoli DR, Navin A, Nyberg J, Podolyák Z, Pullia A, Quintana B, Ralet D, Redon N, Reiter P, Rezynkina K, Saillant F, Salsac MD, Sánchez-Benítez AM, Sanchis E, Şenyiğit M, Siciliano M, Smirnova NA, Sohler D, Stanoiu M, Theisen C, Valiente-Dobón JJ, Ujić P, Zielińska M.   +61 more
europepmc   +1 more source

Dwarf Nova Outbursts and Superoutbursts [PDF]

International Astronomical Union Colloquium, 1996
Dwarf nova outbursts provide an almost unique opportunity of getting an insight into the nature of viscosity in accretion disks or, within the α- disk approach, of putting some constraints on α. In particular, the strong dependence of the viscous time-scale on viscosity itself permits us to estimate a almost directly from the observed time-scales.
openaire   +1 more source

AN ASTROMETRIC CATALOG OF SOUTHERN AND EQUATORIAL DWARF NOVAE

, 1992
An astrometric catalogue of 117 southern and equatorial dwarf novae is presented, complementing earlier work for the northern sky. The mean internal accuracy of the coordinates if of the order of +/- 0.025s in alpha cos-delta and +/- 0.3" in ...
UNGRUHE, R, VOGT, N, MEIJER, J, BRUCH, A, SCHIMPKE, T, NAUMANN, M   +5 more
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Neon Novae, Recurrent Novae, and Type I Supernovae [PDF]

, 1989
Over the past few years, we have been investigating the effects of accretion onto massive white dwarfs and its implications for their growth in mass toward the Chandrasekhar limit, in attempts to identify a possible relationship between SN I and novae ...
Technion-Israel Institute of Technology, Haifa (Israel), Starrfield, Sumner, Sparks, Warren M., Shaviv, Giora, Illinois University, Urbana, Truran, James W.   +5 more
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