Results 31 to 40 of about 10,468 (212)

Accretion Discs in Cataclysmic Variable Stars [PDF]

International Astronomical Union Colloquium, 1997
AbstractAn overview is given of the spatial and time-dependent properties of the accretion discs in cataclysmic variable stars.
openaire   +1 more source

STEREO observations of stars and the search for exoplanets [PDF]

, 2011
The feasibility of using data from the NASA STEREO mission for variable star and asteroseismology studies has been examined. A data analysis pipeline has been developed that is able to apply selected algorithms to the entire data base of nearly a million
A. J. Norton, Auvergne, Bewsher, Brown, Claret, D. Bewsher, de Mink, Eyles, Glenn J. White, Hussain, K. T. Wraight, Kaiser, Kamiński, Koch, Kovács, Kozai, Mathieu, Oksala, O’Brien, Pollacco, Prs̆a, R Development Core Team, Scargle, Southworth, Stassun, Torres, VandenBerg, Vanmunster, Welch, Zacharias   +29 more
core   +2 more sources

Investigation of the new cataclysmic variable 1RXS J180834.7+101041

, 2012
We present the results of our photometric and spectroscopic studies of the new eclipsing cataclysmic variable star 1RXS J180834.7+101041. Its spectrum exhibits double-peaked hydrogen and helium emission lines.
A. D. Schwope, A. M. Fridman, A. W. Shafter, B. L. Afanasiev, B. Paczynski, B. Warner, C. Hellier, C. Hellier, C. Knigge, C. Papadaki, D. G. Yakin, D. Steeghs, D. Steeghs, D. V. Bisikalo, E. Romero-Colmenero, G. A. Chanan, H. M. Boffin, I. F. Bikmaev, J. Bailey, J. K. Cannizzo, J. Patterson, J. Wood, K. Horne, M. F. Walker, M. R. Schreiber, N. I. Shakura, N. V. Borisov, P. P. Eggleton, P. Rodrigez-Gil, R. Baptista, R. C. Bohlin, R. K. Saito, R. Schwarz, S. B. Howell, V. F. Suleimanov, V. F. Suleimanov, V. L. Afanasiev, V. V. Neustroev, V. V. Neustroev, V. V. Shimanskii, V. V. Shimanskii, V. V. Shimanskii   +41 more
core   +1 more source

The Periods of Cataclysmic Variable Stars [PDF]

International Astronomical Union Colloquium, 1983
To understand the structure and evolution of the cataclysmic variables, we will need accurate values for their masses, dimensions, mass transfer rates, and other physical properties. Unfortunately, despite an abundance of observational data on these systems, there is a severe dearth of reliable, quantitative information about their fundamental physical
openaire   +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

The ethics of responding to democratic backsliding abroad

American Journal of Political Science, EarlyView.
Abstract The past decade has seen a marked shift as many previously liberal democratic states have backslidden, taking authoritarian turns. How should liberal actors respond to democratic backsliding by others? Although it might seem that it is vital for liberal actors to react robustly to avoid complicity or to maintain their liberal integrity, this ...
James Pattison
wiley   +1 more source

The S-PLUS 12-band Photometry as a Powerful Tool for Discovery and Classification: Ten Cataclysmic Variables in a Proof-of-concept Study

The Astrophysical Journal Letters
Multiband photometric surveys provide a straightforward way to discover and classify astrophysical objects systematically, enabling the study of a large number of targets at relatively low cost.
Raimundo Lopes de Oliveira, Amanda S. de Araújo, Angela C. Krabbe, Claudia L. Mendes de Oliveira, Koji Mukai, Luis A. Gutiérrez-Soto, Antonio Kanaan, Romualdo Eleutério, Marcelo Borges Fernandes, Fredi Quispe-Huaynasi, William Schoenell, Tiago Ribeiro   +11 more
doaj   +1 more source

Benefitting from brutality? Profits of north‐western Europe's slave trade at the eve of the industrial revolution

The Economic History Review, EarlyView.
Abstract One of the most contentious issues in the study of the Atlantic slave trade is the profitability of the trade. In this paper, we contribute by pooling all available data on transatlantic slave ship voyage accounts into a joint dataset. This dataset includes data from a period of 100 years (1730–1830) and from five nations (Denmark, France ...
Klas Rönnbäck, Guillaume Daudin, Gerhard de Kok, David Richardson, Miguel Geraldes Rodrigues   +4 more
wiley   +1 more source

Observations of Five Southern-hemisphere Cataclysmic Binary Stars

The Astronomical Journal
We present observations and analyses of five little-studied cataclysmic binary stars in the southern celestial hemisphere. Our new observations are from the South African Astronomical Observatory.
John R. Thorstensen, Annabelle E. Niblett, Shreya Gandhi, Lauren P. Zanarini, Gavin D. Goss, Arnav Singh, Divik Verma, Ryan C. Hickox, Emmanuel A. Durodola, Jiaqi Martin Ying   +9 more
doaj   +1 more source

Theoretical Light-curve Models of the Symbiotic Nova CN Cha—Optical Flat Peak for 3 Yr

The Astrophysical Journal, 2023
CN Cha is a slow symbiotic nova characterized by a 3 yr long optical flat peak followed by a rapid decline. We present theoretical light curves for CN Cha, based on hydrostatic approximation, and estimate the white-dwarf (WD) mass to be ∼0.6 M _☉ for a ...
Mariko Kato, Izumi Hachisu
doaj   +1 more source