Results 41 to 50 of about 34,923 (243)

The donor stars of cataclysmic variables [PDF]

Monthly Notices of the Royal Astronomical Society, 2006
Abstract We carefully consider observational and theoretical constraints on the global properties of secondary stars in cataclysmic variable stars (CVs). We then use these constraints to construct and test a complete, semi-empirical donor sequence for CVs with orbital periods Porb≤ 6 h.
openaire   +3 more sources

Minute-cadence observations of the LAMOST fields with the TMTS: II. Catalogues of short-period variable stars from the first 2-yr surveys [PDF]

Monthly notices of the Royal Astronomical Society, 2023
Over the past few years, wide-field time-domain surveys such as Zwicky Transient Facility and Optical Gravitational Lensing Experiment have led to discoveries of various types of interesting short-period stellar variables, such as ultracompact ...
Jie Lin, Xiaofeng Wang, J. Mo, G. Xi, A. Filippenko, Shengyu Yan, T. Brink, Yi Yang, Chengyuan Wu, P. Németh, Gaici Li, Fang Guo, Jincheng Guo, Yongzhi Cai, H. Xiong, Weikang Zheng, Qichun Liu, Jicheng Zhang, Xiaojun Jiang, Liyang Chen, Q. Xia, H. Peng, Zhihao Chen, Wenxiong Li, Weili Lin, D. Xiang, Xiaoran Ma, Jialian Liu   +27 more
semanticscholar   +1 more source

System parameters of three short-period cataclysmic variable stars [PDF]

Monthly Notices of the Royal Astronomical Society, 2021
ABSTRACT Using photometric ULTRACAM observations of three new short-period cataclysmic variables (CVs), we model the primary eclipse light curves to extract the orbital separation, masses, and radii of their component stars. We find donor masses of $0.060\pm 0.008\, {\rm M_\odot }$, $0.042\pm 0.001\, {\rm M_\odot }$, and $0.042\pm 0.004\,
J F Wild, S P Littlefair, R P Ashley, E Breedt, A J Brown, V S Dhillon, M J Dyer, M J Green, P Kerry, T R Marsh, S G Parsons, D I Sahman   +11 more
openaire   +4 more sources

CCD Photometry Using Multiple Comparison Stars [PDF]

Journal of Astronomy and Space Sciences, 2004
The accuracy of CCD observations obtained at the Korean 1.8 m telescope has been studied. Seventeen comparison stars in the vicinity of the cataclysmic variable BG CMi have been measured.
Yonggi Kim, Ivan L. Andronov, Young-Beom Jeon   +2 more
doaj   +1 more source

Gravitational Wave Emission by Cataclysmic Variables: numerical models of semi-detached binaries [PDF]

, 2001
Gravitational wave emission is considered to be the driving force for the evolution of short-period cataclysmic binary stars, making them a potential test for the validity of General Relativity.
Rezzolla, Luciano, Uryu, Koji, Yoshida, Shin'ichirou   +2 more
core   +2 more sources

Imaging the Secondary Stars in Cataclysmic Variables [PDF]

, 2001
The secondary, Roche-lobe filling stars in cataclysmic variables (CVs) are key to our understanding of the origin, evolution and behaviour of this class of interacting binary. We review the basic properties of the secondary stars in CVs and the observational and analysis methods required to detect them.
Dhillon, V.S., Watson, C.A.
openaire   +3 more sources

High spectral resolution time-resolved optical spectroscopy of V893 Sco [PDF]

, 2001
We present high resolution time-resolved optical spectra of the high inclination short orbital period dwarf nova V893 Sco. We performed spectral analysis through radial velocity measurements, Doppler mapping, and ratioed Doppler maps.
E. Mason, Horne K., Horne K., Howell S. B., Matsumoto K., Osaki Y., R. E. Mennickent, S. B. Howell, Smak J., Tylenda R., W. Skidmore, Whitehurst R., Wood J. H.   +12 more
core   +2 more sources

CCD-PHOTOMETRY OF CATACLYSMIC VARIABLE ES DRA IN 2001

Odessa Astronomical Publications, 2017
On the base of our 34-day photometry of ES Dra we found its ∼ 20 d light variations with amplitude of 1m.6 and suggest this star could belong to the nova-like subclass of cataclysmic variable stars.
A. V. Baklanov, E. P. Pavlenko, O. I. Dudka   +2 more
doaj   +1 more source

The Emergence of a Neutral Wind Region in the Orbital Plane of Symbiotic Binaries during Their Outbursts

The Astronomical Journal, 2023
Accretion of mass onto a white dwarf (WD) in a binary system can lead to stellar explosions. If a WD accretes from stellar wind of a distant evolved giant in a symbiotic binary, it can undergo occasional outbursts in which it brightens by several ...
Augustin Skopal
doaj   +1 more source

”ASYMPTOTIC PARABOLA” FITS FOR SMOOTHING GENERALLY ASYMMETRIC LIGHT CURVES

Odessa Astronomical Publications, 2016
A computer program is introduced, which allows to determine statistically optimal approximation using the "Asymptotic Parabola" fit, or, in other words, the spline consisting of polynomials of order 1,2,1, or two lines ("asymptotes") connected with a ...
K. D. Andrych, I. L. Andronov, L. L. Chinarova, V. I. Marsakova   +3 more
doaj   +1 more source