Results 31 to 40 of about 2,487,342 (212)

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

The helium-rich cataclysmic variable SBSS 1108+574 [PDF]

, 2013
We present time-resolved spectroscopy and photometry of the dwarf nova SBSS 1108+574, obtained during the 2012 outburst. Its quiescent spectrum is unusually rich in helium, showing broad, double-peaked emission lines from the accretion disc. We measure a
Koff, R.A., Koff, R. A., Kupfer, T., Steeghs, D., Gänsicke, B., Gaensicke, B. T., Koester, D., Carter, P. J., Carter, P., Rau, A., Groot, P., Roelofs, G., Krajci, T., Gänsicke, B. T. (Boris T.), Carter, P.J., Koff, R., Marsh, T., Roelofs, G. H. A., Marsh, T. R., Groot, P.J., Marsh, Tom, Koester, Detlev, Krajci, Thomas, Gänsicke, B. T., Roelofs, G.H.A., Rau, Arne, Miguel Agustino, Enrique de, Breedt, E., Goff, W., Nelemans, G., Koff, Robert, Gänsicke, B.T., de Miguel, E., Marsh, T.R., Nelemans, G.A., Groot, P. J., Miguel, E. de   +36 more
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Exploring the application of new telescope technologies in the testing of dwarf novae accretion models [PDF]

, 2011
Includes abstract.Includes bibliographical references (p. 261-273.)In this thesis I investigate emerging telescope technologies and demonstrate, within the context of accretion in cataclysmic variables (CVs), their role in contributing to the stellar ...
Spark, Mellony
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

The properties of cataclysmic variables in photometric H alpha surveys [PDF]

, 2006
We report on the properties of 71 known cataclysmic variables (CVs) in photometric H alpha emission-line surveys. Our study is motivated by the fact that the Isaac Newton Telescope (INT) Photometric H alpha Survey of the northern galactic plane (IPHAS ...
Rodriguez-Flores, E.R., Morales-Rueda, L., Corradi, R.L.M., Drew, J. E., Corradi, R.M., Rodriguez-Gil, P., Steeghs, D., Gaensicke, B. T., Witham, Andrew, Knigge, C., Groot, P., Greimel, R., Drew, J.E., Gänsicke, B.T., Corradi, R. L. M., Aungwerojwit, A., Groot, P. J., Knigge, Christian, Witham, A.R., Groot, P.J.   +19 more
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Irradiation of the secondary star in cataclysmic variables [PDF]

Monthly Notices of the Royal Astronomical Society, 1992
It is shown how the relative strength of the Na I doublet over the surface of the secondary star can be calculated from radial velocity curves obtained using the Na I absorption feature around 8190 A. The results for 11 dwarf novae and one magnetic cataclysmic binary system are presented.
S. Davey, R. C. Smith
openaire   +1 more source

Cataclysmic variable stars

, 2023
Cataclysmic variable stars are semi-detached binary systems consisting of a white dwarf primary star and a late-type secondary star. The secondary star in these systems is over- filling its Roche lobe, which enables a mass transfer to occur between the ...
Kára, Jan
core   +1 more source

Hubble space telescope STIS spectroscopy of the peculiar nova-like variables BK Lyn, V751 Cygni, and V380 Oph [PDF]

, 2009
We obtained Hubble STIS spectra of three nova-like variables: V751 Cygni, V380 Oph, and—the only confirmed nova-like variable known to be below the period gap—BK Lyn.
Gänsicke, B. T. (Boris T.), Hollon, Nicholas, Ballouz, Ronald-Louis, Sion, Edward M., Godon, Patrick, Long, Knox S., Zellem, Robert   +6 more
core   +1 more source

White Dwarfs in Cataclysmic Variable Stars: Surface Temperatures and Evolution [PDF]

Journal of Astronomy and Space Sciences, 2012
A summary is presented of what is currently known about the surface temperatures of accreting white dwarfs (WDs) detected in non-magnetic and magnetic cataclysmic variables (CVs) based upon synthetic spectral analyses of far ultraviolet data.
Edward M. Sion
doaj   +1 more source

In Situ Construction of Phosphorus‐Containing Crosslinked Urethane Network Combined With Ammonium Polyphosphate via Reactive Blending for Enhancing Flame Retardancy and Anti‐Dripping Performance of Polylactic Acid Composites

Safety Science and Technology, EarlyView.
By in situ reaction blending, DOPO‐HQ and THEIC were added to PLA with MDI to construct a phosphorus containing polyurethane network, which significantly improved the flame retardant and anti‐dripping properties of polylactic acid composites. ABSTRACT Polylactic acid (PLA) is highly flammable and prone to severe melt dripping during combustion, which ...
Chiyuan Chen, Sadiqa Khan, Hongyu Yang, Xiaming Feng, Chaojun Wan   +4 more
wiley   +1 more source