Results 91 to 100 of about 2,487,342 (212)

A New Window for Studying Intermediate Polars and Tilted Accretion Disk Precession

open access: yesThe Astrophysical Journal
TV Col is a long-period eclipsing intermediate polar (IP) prototype star for the negative superhump (NSH) system. We investigate the eclipse minima, eclipse depth, and NSH amplitude based on TESS photometry.
Qi-Bin Sun   +7 more
doaj   +1 more source

Gas flow in cataclysmic variable stars

open access: yesThe Astrophysical Journal, 1975
A numerical hydrodynamic scheme, applicable to gas flow in binary stars, is presented which incorporates the effects of pressure and gravitational forces, radiative cooling, and shock formation. The method is used to study gas flow originating from Roche lobe overflow through the inner Lagrangian point, L$sub 1$, in a binary star modeled to resemble ...
openaire   +1 more source

Searching for Accreting Compact Binary Systems from Spectroscopy and Photometry: Application to LAMOST Spectra

open access: yesThe Astrophysical Journal
Compact objects undergoing mass transfer exhibit significant (and double-peaked) H _α emission lines. Recently, new methods have been developed to identify black hole X-ray binaries and calculate their systematic parameters using H _α line parameters ...
Xinlin Zhao, Song Wang, Jifeng Liu
doaj   +1 more source

EUVE J0854+390: a new Cataclysmic Variable [PDF]

open access: yes, 2001
We report the identification of a new CV in the field of EUVE J0854+390. The optical spectra show Balmer, He I and He II lines strongly in emission and indicates the source is a CV, probably magnetic.Information Bulletin on Variable Stars 5032(1).
B. Roberts   +3 more
core  

TESS Light Curves of Cataclysmic Variables. IV. A Synoptic View of Eclipsing Old Novae and Novalike Variables

open access: yesThe Astrophysical Journal Supplement Series
Based mainly on the months-long 2 minutes time-resolution light curves observed by the Transiting Exoplanet Survey Telescope (TESS) space mission of 48 eclipsing old novae and novalike variables (commonly referred to as NLs) selected from the Ritter ...
Albert Bruch
doaj   +1 more source

Time-resolved spectroscopy of the AM Herculis-type binary systems QQ VUL and EF ERI

open access: yes, 1998
Cataclysmic variable stars (CVs) are interacting binary systems. One of the stars (referred to as the primary) is a white dwarf, the other (referred to as the secondary) is usually a late main sequence star such as a red dwarf.
Blakelock, Carolyn J.
core  

Optical identification of IGR J18308-1232 as a cataclysmic variable [PDF]

open access: yes, 2008
We report on a spectroscopic analysis of optical sources inside the error circle of the XMM-Newton slew source XMMLS1 J183049.6-123218 (see Ibarra et al., ATel #1527), associated with the unidentifiedINTEGRAL source IGR J18308-1232 (Bird et al.
VAHRAM CHAVUSHYAN
core  

Mapeamento espectral de discos de acréscimo em variáveis cataclísmicas [PDF]

open access: yes, 2008
Tese (doutorado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas. Programa de Pós-Graduação em Física.Esta tese de doutorado é a continuação da dissertação de mestrado defendida em 2004. Nosso projeto visa analisar, com
Saito, Roberto Kalbusch
core  

1RXS J173021.5-055933 : a cataclysmic variable with a fast-spinning magnetic white dwarf [PDF]

open access: yes, 2008
Aims. We present the first X-ray observations with the XMM-Newton and INTEGRAL satellites of the recently discovered cataclysmic variable 1RXS J173021.5-055933, together with simultaneous UV and coordinated optical photometry aiming at characterising its
Matt, Giorgio   +42 more
core   +1 more source

Resolving the Periods of the Asynchronous Polar 1RXS J083842.1–282723

open access: yesThe Astrophysical Journal
1RXS J083842.1−282723 is a nearly synchronous magnetic cataclysmic variable with a simple X-ray light curve. While its orbital period was fairly well established at P _orb = 98.4 minutes from optical spectroscopy, indirect estimates of P _spin / P _orb ...
J. P. Halpern
doaj   +1 more source

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