Results 41 to 50 of about 17,626 (204)

Detached cataclysmic variables are crossing the orbital period gap [PDF]

, 2016
A central hypothesis in the theory of cataclysmic variable (CV) evolution is the need to explain the observed lack of accreting systems in the ~2-3 h orbital period range, known as the period gap.
Agurto-Gangas, Carolina, Gänsicke, Boris T., Gómez-Morán, Ada Nebot, Hardy, Adam, Parsons, Steven G., Rebassa-Mansergas, Alberto, Schreiber, Matthias R., Schwope, Axel D., Zorotovic, Monica   +8 more
core   +6 more sources

Rapid oscillations in cataclysmic variables [PDF]

Astrophysics and Space Science, 1986
I give an overview of the rich phenomenology of dwarf nova oscillations (DNOs) and Quasi-periodic Oscillations (QPOs) observed in cataclysmic variable stars (CVs). The favoured interpretation of these rapid brightness modulations (3 - >1000 s time scales) is that they are magnetic in nature - magnetically channelled accretion from the inner ...
openaire   +3 more sources

Non-conservative Evolution of Cataclysmic Variables [PDF]

, 2000
We suggest a new mechanism to account for the loss of angular momentum in binaries with non-conservative mass exchange. It is shown that in some cases the loss of matter can result in increase of the orbital angular momentum of a binary. If included into
A. A. Boyarchuk, A. King, A. Skumanich, A. V. Fedorova, A. V. Fedorova, A. V. Fedorova, A. V. Fedorova, A. V. Fedorova, A. V. Tutukov, A. V. Tutukov, A. V. Tutukov, A. V. Tutukov, A. V. Tutukov, A. V. Tutukov, B. Paczyński, B. Paczyński, B. Paczyński, D. A. Smith, D. R. Alexander, D. V. Bisikalo, D. V. Bisikalo, D. V. Bisikalo, D. V. Bisikalo, E. Schatzman, F. Verbunt, G. Fontaine, G. R. Caughlan, H. C. Spruit, H. Ritter, H. Ritter, I. Hachisu, I. Iben Jr., J. Faulkner, J. J. Matese, J. Patterson, K. H. Kieboom, K. Sawada, K. Schenker, L. D. Landau, L. Mestel, L. R. Yungel’son, L. R. Yungel’son, L. Yungelson, L. Yungelson, M. A. Ruderman, M. J. Harris, M. Kato, M. Kool de, M. Livio, M. Politano, O. A. Kuznetsov, O. A. Kuznetsov, P. A. Denisenkov, P. Hut, P. P. Eggleton, P. P. Eggleton, R. F. Webbink, R. P. Kraft, S. Rappaport, S. Rappaport, U. Kolb, U. Kolb, U. Kolb   +62 more
core   +2 more sources

Brown dwarfs in retrogradely precessing cataclysmic variables?

EPJ Web of Conferences, 2011
We compare Smoothed Particle Hydrodynamic simulations of retrogradely precessing accretion disks that have a white dwarf primary and a main sequence secondary with observational data and with theory on retrograde precession via tidal torques like those ...
Martin E.L., Deshpande R., Montgomery M.M.   +2 more
doaj   +1 more source

White dwarf masses in cataclysmic variables

, 2015
The white dwarf (WD) mass distribution of cataclysmic variables (CVs) has recently been found to dramatically disagree with the predictions of the standard CV formation model.
Schreiber, M. R., Wijnen, T. P. G., Zorotovic, M.   +2 more
core   +1 more source

Ultraviolet observations of cataclysmic variables [PDF]

Advances in Space Research, 1987
AbstractThe preliminary results of the analysis of more than 1000 spectra of cataclysmic variables in the archive of the International Ultraviolet Explorer were presented at the meeting. To characterize the slope of the spectra I use F = log(f1460Å/f2880Å). For most spectra F lies between 0.2 and 0.7.
openaire   +1 more source

THE WINDS OF CATACLYSMIC VARIABLES [PDF]

, 2018
19 pages, TeX format, 6 Postscript figures, uses mauche.mac and cwhstuff.tex. To appear in Cosmic Winds and the Heliosphere, ed. J. R. Jokipii, C. P. Sonett, & M. S. Giampapa (Tucson: Univ. of Arizona Press)
Mauche, C. W., Raymond, J. C.
openaire   +2 more sources

Spectroscopically Identified Cataclysmic Variables from the LAMOST Survey. II. Period Estimates

The Astronomical Journal, 2023
We examine a sample of 340 cataclysmic variables (CVs) from the latest data release of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) survey, along with 18 objects that are newly classified as CVs.
Wen Hou, A-Li Luo, Yi-Qiao Dong, Xiang-Lei Chen, Zhong-Rui Bai   +4 more
doaj   +1 more source

Followup Observations of SDSS and CRTS Candidate Cataclysmic Variables [PDF]

, 2014
We present photometry of 11 and spectroscopy of 35 potential cataclysmic variables from the Sloan Digital Sky Survey, the Catalina Real-Time Transient Survey and vsnet-alerts.
Bond, Howard E., Everett, Mark E., Howell, Steve B., Landolt, Arlo U., Silva, David R., Szkody, Paula, Vasquez-Soltero, Stephanie   +6 more
core   +3 more sources

A strike for democracy? Migration, the bigot's veto, and the electoral use of force

American Journal of Political Science, EarlyView.
Abstract Politicians and philosophers alike have warned that the spread of anti‐migrant bigotry in the Western world requires a tragic trade‐off regarding immigration policy: Although millions of asylum‐seekers might be owed admission to Western democracies, there are many cases where they nonetheless ought to be denied entry, because their admission ...
Shmuel Nili
wiley   +1 more source