Results 91 to 100 of about 10,397 (194)

The nautre of dwarf novae and related systems [PDF]

The high energy emissions from cataclysmic variables (interacting binary systems containing an accreting white dwarf) and the relationship of the high energy emission of these stars to their optical properties were investigated.
Lampton, M.
core   +1 more source

Idling Magnetic White Dwarf in the Synchronizing Polar BY Cam. The Noah-2 Project

, 2008
Results of a multi-color study of the variability of the magnetic cataclysmic variable BY Cam are presented. The observations were obtained at the Korean 1.8m and Ukrainian 2.6m, 1.2m and 38-cm telescopes in 2003-2005, 56 observational runs cover 189 ...
A. Bianchini, A.A. Henden, A.D. Silber, A.J. Norton, A.R. King, B. Warner, C. Hellier, E.P. Pavlenko, E.P. Pavlenko, E.P. Pavlenko, E.T. Whittaker, G.A. Wynn, H. Ritter, H.R. Richman, H.S. Stockman, I.L. Andronov, I.L. Andronov, I.L. Andronov, I.L. Andronov, I.L. Andronov, I.L. Andronov, I.L. Andronov, I.L. Andronov, I.L. Andronov, I.L. Andronov, I.L. Andronov, I.L. Andronov, J. Patterson, J. Tremko, M. Cropper, M. Livio, M.M. Basko, P. Szkody, P.A. Mason, P.A. Mason, P.A. Mason, P.A. Mason, R. Hudec, R. Schwarz, R.A. Remillard, R.D. Geckeler, R.K. Honeycutt, S. Kafka, T. Neckel, T.A. Somova, V.V. Breus, W. Forman, Y.G. Kim, Y.G. Kim, Y.G. Kim   +49 more
core   +1 more source

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

The 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

Erupting Cataclysmic Variable Stars in the Nearest Globular Cluster, NGC 6397: Intermediate Polars?

, 2005
NGC 6397 is the closest globular cluster, and hence the ideal place to search for faint stellar populations such as cataclysmic variables (CVs). HST and Chandra observers have identified nine certain and likely CVs in this nearby cluster, including ...
A. Dieball, Angelini L., C. Knigge, David R. Zurek, Echevarria J., Fabian A. C., Hellier C., Michael M. Shara, Mineshige S., Sasha Hinkley   +9 more
core   +2 more sources

Orbital variations and outbursts of the unusual variable star V1129 Centauri

, 2017
The variable star V1129 Cen is classified in the GCVS as being of $\beta$ Lyr type. Unusual for such stars, it exhibits outbursts roughly once a year, lasting for $\sim$40 days. For this reason, a relationship to the dwarf novae has been suspected. Here,
Bruch, Albert
core   +1 more source

Pole-On Cataclysmic Variables as Be Stars [PDF]

International Astronomical Union Colloquium, 1987
Cataclysmic-variable stars (CVs) are technically Be stars, since Balmer emission lines appear in their spectra. In general, CV spectra are so unusual that they are easily recognized. The main features are extremely broad, shallow hydrogen lines with broad, faint emission cores.
openaire   +1 more source

What’s Cool About Hot Stars? Cataclysmic Variables in the Mid-Infrared [PDF]

, 2009
We review recent results from mid-infrared observations of cataclysmic variables with the Spitzer Space Telescope. In general, these observations have revealed mid-infrared excesses, above the level expected from the stellar and accretion components, in ...
Brinkworth, C., Ciardi, D., Hoard, D. W., Howell, S., Kafka, S., Szkody, P., Wachter, S.   +6 more
core  

X-ray Sources and their Optical Counterparts in the Globular Cluster M4

, 2004
We report on the Chandra X-ray Observatory ACIS-S3 imaging observation of the Galactic globular cluster M4 (NGC 6121). We detect 12 X-ray sources inside the core and 19 more within the cluster half-mass radius. The limiting luminosity of this observation
Anderson, S.F., Astrophysics, Bassa, C.G., Dep Natuurkunde, Gaensler, B.M., Homer, L., Kaspi, V.M., Lewin, W.H.G., Margon, B., Pooley, D., Universiteit Utrecht, van der Klis, M., Verbunt, F.W.M.   +12 more
core   +2 more sources

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

The 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

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