Results 31 to 40 of about 1,271 (117)

Accretion physics of AM Herculis binaries, I. Results from one-dimensional stationary radiation hydrodynamics

, 2001
We have solved the one-dimensional stationary two-fluid hydrodynamic equations for post-shock flows on accreting magnetic white dwarfs simultaneous with the fully frequency and angle-dependent radiative transfer for cyclotron radiation and bremsstrahlung.
A. Fischer, Aizu, Chanmugam, Chanmugam, Chevalier, Imamura, Imamura, Imamura, Imamura, K. Beuermann, Kuijpers, Lamb, Nauenberg, Rousseau, Saxton, Thompson, van Teeseling, Wada, Woelk, Woelk, Woelk, Wolff, Wu   +22 more
core   +1 more source

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

Circular polarimetry of EXO 033319-2554.2 - A new eclipsing AM Herculis star

The Astrophysical Journal, 1988
This Letter presents circular polarimetry that unequivocally identifies EXO 033319-2554.2 as only the third eclipsing AM Her star and brings the total number of AM Her stars now identified to 14. The orbital period is 126.4 minutes, as previously reported, and defines a new short-period edge to the period gap seen in all classes of cataclysmic variable
Graham Berriman, Paul S. Smith
openaire   +1 more source

An interferometric study of the post-AGB binary 89 Herculis I Spatially resolving the continuum circumstellar environment at optical and near-IR wavelengths with the VLTI, NPOI, IOTA, PTI, and the CHARA Array

, 2013
Binary post-AGB stars are interesting laboratories to study both the evolution of binaries as well as the structure of circumstellar disks. A multiwavelength high angular resolution study of the prototypical object 89 Herculis is performed with the aim ...
Banerjee, D. P. K., Brummelaar, T. ten, Chesneau, O., Farrington, C., Hillen, M., Hummel, C. A., Monnier, J. D., Mourard, D., Tycner, C., Van Winckel, H., Verhoelst, T., Zavala, R. T.   +11 more
core   +2 more sources

Studies on the Habits and Distribution of Cryptocerus Texanus Santschi (Hymenoptera: Formicidae)

, 1954
Psyche: A Journal of Entomology, Volume 61, Issue 2, Page 41-57, 1954.
W. S. Creighton, R. E. Geegg
wiley   +1 more source

Spectroscopic Follow-up on Potential Magnetic Cataclysmic Variables

The Astronomical Journal
Spectroscopic observations of nine cataclysmic variables that have been postulated to contain magnetic white dwarfs were obtained to further characterize their classifications, orbital parameters, inclinations, and/or accretion properties.
Paula Szkody, Jan van Roestel, Paul A. Mason, Colin Littlefield, R. Michael Rich, Eric C. Bellm, Filipp D. Romanov, Brian F. Healy, Theophile Jegou du Laz, Russ R. Laher, Ben Rusholme   +10 more
doaj   +1 more source

Irradiated atmospheres of accreting magnetic white dwarfs with an application to the polar AM Herculis [PDF]

, 2005
We present a pilot study of atmospheres of accreting magnetic white dwarfs irradiated by intense fluxes at ultraviolet to infrared wavelengths. The model uses a standard LTE stellar atmosphere code which is expanded by introducing an angle-dependent ...
Beuermann, K. (Klaus), Gaensicke, B. T. (Boris T.), König, M.   +2 more
core   +2 more sources

Magnetic Interaction in Ultra-compact Binary Systems

, 2009
This article reviews the current works on ultra-compact double-degenerate binaries in the presence of magnetic interaction, in particular, unipolar induction. The orbital dynamics and evolution of compact white-dwarf pairs are discussed in detail. Models
Alfvéen, Belczynski, Belczynski, Blandford, Campbell, Cropper, Cropper, Dulk, Ellis, Feynman, Israel, Israel, Kelley, Kinwah Wu, Kopparapu, Laine, Landau, Lewin, Li, Li, Li, Miller, Montgomery, Motch, Nelemans, Nelemans G, Postnov, Punsly, Retter, Shatskii, Solheim, Steeghs, Strohmayer, Strohmayer, Strohmayer, Strohmayer, Strohmayer, Uchida, Visvanathan, Warner, Wickramasinghe, Wu, Wu, Wu   +43 more
core   +1 more source

TESS Observations of Outbursts on Polars—Superflares

The Astrophysical Journal
Flare events are magnetic activities on the stellar surface, which can provide us with information about the accretion behavior and evolution of polars. In this paper, we search for flare events on polars from all the available 2 minute cadence TESS data
Qishan Wang, Xiaohui Fang, Shengbang Qian   +2 more
doaj   +1 more source

X-Ray and Infrared Analysis on a Faint Polar RX J1745.5-2905

The Astrophysical Journal
RX J1745.5-2905 is a faint and distant polar below the period gap. It was observed intensively in X-ray by Chandra, and its X-ray data reveal frequent brightness transitions between low and high states like we found in the prototype star AM Her.
Qishan Wang, Xiaohui Fang, Shengbang Qian   +2 more
doaj   +1 more source