Results 51 to 60 of about 10,468 (212)

Identification of new cataclysmic variables in the 1RXS and USNO-B1.0 catalogs

, 2010
As a result of applying the original optical variability search method on publicly available data, we have found eight new cataclysmic variables and two possible Optically Violent Variable quasars among the previously unidentified X-ray sources in the ...
A. J. Drake, B. J. Teegarden, B. T. Gänsicke, C. Motch, D. G. Monet, D. V. Denisenko, D. V. Denisenko, D. V. Denisenko, F. Verbunt, F.-J. Zickgraf, I. N. Reid, J. J. Condon, K. V. Sokolovsky, M. F. Skrutskie, N. Zacharias, N. Zacharias, P. Wils, W. Voges, X.-T. He, Y. Bai   +19 more
core   +1 more source

Cataclysmic Variables as Binary Stars: Then and Now [PDF]

International Astronomical Union Colloquium, 1990
AbstractA brief history is given of the clues that led to the establishment, in the period c. 1950 to 1965, of a universal binary model for novae and related cataclysmic variables. The observational facts, established early in this period by A. H. Joy and R. F. Sanford (selected binary orbits), J. L. Greenstein (spectroscopy) and M. Walker (photometry)
openaire   +1 more source

‘I Don't Want Another Five Years of “The Only Thing We Talk About Is Brexit”’: The Dynamics of EU (De)politicisation in Post‐Brexit Britain

JCMS: Journal of Common Market Studies, Volume 64, Issue 3, Page 1048-1068, May 2026.
Abstract The 2016 Brexit referendum was a watershed moment for the politicisation of the European Union (EU) in the United Kingdom. Much has been written about the politicising effects of the referendum, along with the Leave result's subsequent contestation in the media as well as in national and European election cycles.
Anne‐Marie Houde, Louis Stockwell
wiley   +1 more source

The AM Her System RX J1844.2+4454/2MASS J18441496+4454091/ZTF18aapobha

The Astrophysical Journal
Based on ROSAT All-Sky Survey data and optical follow-up observations, we report observations of the cataclysmic variable RX J1844.2+4454/2MASS J18441496+4454091/ZTF18aapobha.
J. Greiner, R. Schwarz, G. H. Tovmassian, M. Orio   +3 more
doaj   +1 more source

Photometric study of the variable star population in the globular cluster NGC 6397

, 2005
We present the results of a photometric survey for variable stars in the central region of the nearby globular cluster NGC 6397.Time series photometry was obtained for 30 variable objects.
A. Schwarzenberg-Czerny, I. B. Thompson, J. Kaluzny, W. Krzeminski   +3 more
core   +1 more source

Discovery of a new cataclysmic variable through optical variability and X-ray emission [PDF]

, 2006
Aims: We present discovery observations of the new cataclysmic variable star (CV) 1RXS J092737.4-191529, as well as spectra and photometry of SY Vol. The selection technique that turned up these two CVs is described; it should be efficient for finding ...
Bruch, C. Knigge, Cieslinski, Cropper, Groot, Gänsicke, Hambly, Hambly, Hambly, Hellier, Kim, Livio, M. L. Pretorius, O'Donoghue, Osaki, Patterson, Patterson, Ramsay, Schwope, van Teeseling, Verbunt, Voges, Voges, Walker, Warner, Wheatley, Woudt   +26 more
core   +3 more sources

Regional Inequalities in Trachoma Prevention in Ethiopia: A Meta‐Analysis

Health Science Reports, Volume 9, Issue 4, April 2026.
ABSTRACT Background and Aims Trachoma remains a significant public health problem in Ethiopia, particularly affecting children. Mothers play a crucial role in implementing preventive practices that interrupt trachoma transmission. Therefore, this systematic review and meta‐analysis seek to address Regional Inequalities in Trachoma Prevention in ...
Zufan Alamrie Asmare, Almaw Genet Yeshiwas, Gashaw Melkie Bayeh, Tilahun Degu Tsega, Sintayehu Simie Tsega, Asaye Alamneh Gebeyehu, Getaneh Atikilt Yemata, Rahel Mulatie Anteneh, Amare Genetu Ejigu, Ahmed Fentaw Ahmed, Zeamanuel Anteneh Yigzaw, Abathun Temesgen, Abebaw Molla Kebede, Habitamu Mekonen, Anley Shiferaw Enawgaw, Getasew Yirdaw, Berhanu Abebaw Mekonnen, Meron Asmamaw Alemayehu, Zekaryas Ewnetu Gashu, Chalachew Yenew   +19 more
wiley   +1 more source

Photometric Analysis of the Cataclysmic Variable Star LT Eri

The Astronomical Journal
LT Eri is a long-period eclipsing cataclysmic variable star (CV). This study investigates its outbursts, negative superhumps (NSHs), tilted-disk precession, eclipse-depth variations, and observed minus calculated ( O – C ) behavior, using photometric ...
Qi-Bin Sun, Sheng-Bang Qian, Li-Ying Zhu, Qin-Mei Li, Fu-Xing Li, Min-Yu Li, Ping Li   +6 more
doaj   +1 more source

Constraining the White-dwarf Mass and Magnetic Field Strength of a New Intermediate Polar through X-Ray Observations

The Astrophysical Journal, 2023
We report timing and broadband spectral analysis of a Galactic X-ray source, CXOGBS J174517.0−321356 (J1745), with a 614 s periodicity. Chandra discovered the source in the direction of the Galactic Bulge.
Benjamin Vermette, Ciro Salcedo, Kaya Mori, Julian Gerber, Kyung Duk Yoon, Gabriel Bridges, Charles J. Hailey, Frank Haberl, Jaesub Hong, Jonathan Grindlay, Gabriele Ponti, Gavin Ramsay   +11 more
doaj   +1 more source

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

American Journal of Political Science, Volume 70, Issue 2, Page 491-502, April 2026.
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