Results 91 to 100 of about 301 (183)

A New WZ Sagittae-type Dwarf Nova KSP-OT-202104a Near the Period Minimum from the KMTNet Supernova Program

open access: yesThe Astronomical Journal
We present photometric and spectroscopic studies of a new WZ Sagittae (Sge)-type dwarf nova (DN) KSP-OT-202104a discovered by the Korea Microlensing Telescope Network Supernova Program. The source exhibits outburst amplitudes of ∼8 mag with a duration of
Sang Chul Kim   +6 more
doaj   +1 more source

Stepanyan's star - A new eclipsing cataclysmic variable

open access: yesThe Astrophysical Journal, 1980
High-speed photometry of the nova-like variable Stepanyan's star shows a 3-hr 48-min orbital period marked by a 2.2-mag eclipse which spans orbital phases 0.91-0.09. The uneclipsed light is variable by typically 0.15 mag on time scales of minutes to seconds and shows no obvious modulation with orbital phase. Intermediate-band colors show an enhancement
openaire   +1 more source

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

open access: yesThe 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   +3 more
doaj   +1 more source

An Equipotential Disk Model with Irradiation for Nova-like Variables

open access: yesThe 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

open access: yesThe 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   +2 more
doaj   +1 more source

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

open access: yesThe 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   +8 more
doaj   +1 more source

On the Masses of Cataclysmic Variable Stars [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 1973
openaire   +1 more source

Tilted Disk Precession and Negative Superhumps in HS 2325+8205: A Multiwindow Analysis

open access: yesThe Astrophysical Journal
Tilted disk precession exists in different objects. Negative superhumps (NSHs) in cataclysmic variable stars are believed to arise from the interaction between the reverse precession of a tilted disk and the streams from the secondary star.
Qi-Bin Sun   +5 more
doaj   +1 more source

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