Results 111 to 120 of about 10,468 (212)

V1047 Cen: The First Z And-type Outburst Observed in the Classical Nova Binary

The Astrophysical Journal
In 2019, the classical nova V1047 Cen experienced an unusual outburst, the nature of which has not yet been clearly determined. In this paper, we show that the 2019 V1047 Cen outburst is of Z And-type—a type that is characteristic of and has so far been ...
Augustin Skopal, Natalia Shagatova
doaj   +1 more source

A Multiband Photometric Selection of Period Bouncer Candidates in the Solar Neighborhood with Gaia, GALEX, WISE, eROSITA, and XMM-Newton Data

The Astrophysical Journal
As cataclysmic variables (CVs) that have evolved past their minimum orbital period, period bouncers have been proposed to be a substantial fraction of the CV population, yet the observed number is significantly lower, posing the “missing bouncer” problem.
Xiao-jie Xu, Yong Shao, Wen-lang He, Xiang-Dong Li   +3 more
doaj   +1 more source

The Photometric Study of EX Dra: A Dwarf Nova Exhibiting a Titled and Precessional Disk

The Astrophysical Journal
We present a photometric study of EX Dra, a dwarf nova that has been extensively observed by the Transiting Exoplanet Survey Satellite. The data reveal the occurrence of 20 complete outbursts, exhibiting several intriguing and rare characteristics.
Wei Liu, Sheng-Bang Qian, Xiang-Dong Shi, Qi-Bin Sun, Xiao-Hui Fang, Qi-Shan Wang   +5 more
doaj   +1 more source

Negative Superhumps in Cataclysmic Variables Driven by Retrograde Apsidal Disk Precession

The Astrophysical Journal Letters
Negative superhumps (NSHs) are photometric modulations in cataclysmic variables with periods slightly shorter than the orbital period. They are usually attributed to retrograde nodal precession of a tilted accretion disk, although the origin and ...
David Vallet, Rebecca G. Martin, Stephen H. Lubow, Stephen Lepp   +3 more
doaj   +1 more source

The Orbital Period Changes for Novae

The Astrophysical Journal
Cataclysmic variables (CVs) are close interacting binaries in which a white dwarf accretes materials from a low-mass main-sequence companion. CVs can experience nova eruptions due to low mass transfer rates.
Wenshi Tang, Xiang-Dong Li, Bo Wang
doaj   +1 more source

Synergies of THESEUS with the large facilities of the 2030s and guest observer opportunities. [PDF]

Exp Astron (Dordr), 2021
Rosati P, Basa S, Blain AW, Bozzo E, Branchesi M, Christensen L, Ferrara A, Gomboc A, O'Brien PT, Osborne JP, Rossi A, Schüssler F, Spurio M, Stergioulas N, Stratta G, Amati L, Casewell S, Ciolfi R, Ghirlanda G, Grimm S, Guetta D, Harms J, Le Floc'h E, Longo F, Maggiore M, Mereghetti S, Oganesyan G, Salvaterra R, Tanvir NR, Turriziani S, Vergani SD, Balman S, Caruana J, Erkut MH, Guidorzi G, Frontera F, Martin-Carrillo A, Paltani S, Porquet D, Sergijenko O.   +39 more
europepmc   +1 more source

Unveiling the X-Ray Properties of the Eclipsing Cataclysmic Variable UU Aqr: Spatially and Spectrally Resolved Two-component Emission

The Astrophysical Journal
Nonmagnetic cataclysmic variables (CVs) show two distinct X-ray components: a hard, optically thin component and a soft, optically thick, blackbody-like component, both produced in the boundary layer between the accretion disk and the white dwarf (WD ...
Nazma Islam, Koji Mukai, Maurice A. Leutenegger, Gabriel W. Pratt   +3 more
doaj   +1 more source

An Equipotential Disk Model with Irradiation for Nova-like Variables

The Astrophysical Journal
The reflection effect is here incorporated within an earlier analytic binary system light- and velocity-curve model that includes a circumstellar equipotential disk.
R. E. Wilson, W. Van Hamme
doaj   +1 more source

Stunted Outbursts and Z Cam–like Behaviors in the Long-term Light Curves of Novalike Cataclysmic Variables

The Astrophysical Journal Supplement Series
A program of long-term ground-based photometric monitoring of 134 old novae and novalike cataclysmic variables (CVs) has been concluded. In this paper, we display, analyze, and discuss the light curves of 33 of these targets, which have shown “stunted ...
R. K. Honeycutt, Jeff W. Robertson, Brandon T. Radzom   +2 more
doaj   +1 more source

Detection of Transitions between Dwarf Nova Outbursts, Standstills, and IW And–type Cycles

The Astrophysical Journal
IW And–type objects represent a rare and intriguing subclass of cataclysmic variables that challenge the classical disk instability model. Due to their long timescales, often lasting several months, observed samples are scarce, leaving the physics of ...
Qi-Bin Sun, Sheng-Bang Qian, Li-Ying Zhu, Qin-Mei Li, Wen-Ping Liao, Fu-Xing Li, Wen-Xu Lin, Min-Yu Li, Ping Li   +8 more
doaj   +1 more source