Results 111 to 120 of about 2,487,342 (212)

Parallaxes and Distance Estimates for 14 Cataclysmic Variable Stars

, 2003
I used the 2.4 m Hiltner Telescope at MDM Observatory in an attempt to measure trigonometric parallaxes for 14 cataclysmic variable stars. Techniques are described in detail.
Thorstensen, John R
core   +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

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

The 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, Youngdae Lee, Dae-Sik Moon, Hong Soo Park, Yuan Qi Ni, Nan Jiang, Hyobin Im   +6 more
doaj   +1 more source

Stepanyan's star - A new eclipsing cataclysmic variable

The 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

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

The First Hours and Days of the 2021 Explosion of the Recurrent Symbiotic Nova RS Ophiuchii

The Astrophysical Journal
The accretion of matter onto a massive white dwarf (WD) can lead to repeated nuclear explosions on its surface over a timescale of years to decades. The seventh explosion of the recurrent symbiotic nova RS Ophiuchi (RS Oph) was recorded on 2021 August 8.
Augustin Skopal, Martin Vrašťák, Francois Teyssier, Mitsugu Fujii, Sergei Shugarov, Miroslav Šlechta, Marek Wolf   +6 more
doaj   +1 more source

Estudo dos eclipses da nova-anã HT cassiopeiae em quiescência e erupção [PDF]

, 2008
Tese (doutorado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas. Programa de Pós-Graduação em Física.Nesta tese de doutorado, apresenta-se um amplo estudo dos eclipses da nova-anã HT Cassiopeiae em quiescência e ...
Borges, Bernardo Walmott
core  

Positive Superhumps in High-mass-ratio Cataclysmic Variables Driven by Apsidal Disk Precession

The Astrophysical Journal Letters
Previously it has been assumed that a cataclysmic variable (CV) disk can only become eccentric and display superhumps if the 3:1 resonance is located within the disk.
Rebecca G. Martin, Stephen H. Lubow, David Vallet, Stephen Lepp   +3 more
doaj   +1 more source

Analysis of cataclysmic variable star energy distributions

The Astronomical Journal, 1982
I analyze spectrophotometry of cataclysmic variable stars covering the wavelength range 0.32--1.1 ..mu..m. The contributions due to the cool secondary star and the accretion disk are separated, subject to the requirement that the spectrum attributed to the accretion disk be ''physically plausible.'' The results for individual stars, which are largely ...
openaire   +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