Results 101 to 110 of about 36,595 (260)

A New Cataclysmic Variable in Hercules [PDF]

, 2004
We present time‐series observations, spectra, and archival outburst data of a newly discovered variable star in Hercules, Var Her 04. Its orbital period, mass ratio, and outburst amplitude resemble those of the ugwz‐type subclass of ugsu dwarf novae ...
A. Price, B. Gary, J. Bedient, L. Cook, M. Templeton, C. Pullen, D. Starkey, T. Crawford, R. Corlan, S. Dvorak, K. Graham, R. Huziak, R. James, D. Messier, N. Quinn, D. Boyd, J. Blackwell, G. Walker, M. Mattei, D. Rodríguez, M. Simonsen, A. Henden, T. Vanmunster, P. Garnavich, J. Pittichová, T. Matheson, P. Challis, R. Kirshner, E. Adams, T. Harrison, M. Koppelman, G. Sarty, D. Mais   +32 more
semanticscholar   +1 more source

Cyclical Period Changes in Cataclysmic Variables: A Statistical Study

The Astrophysical Journal
We report the results of a statistical study of cyclical period changes in cataclysmic variables (CVs). Assuming the third-body hypothesis as the cause of period changes, we estimate the third-body mass, m _3 , and its separation from the binary, a _3 ...
Leandro Souza, Raymundo Baptista
doaj   +1 more source

Discovery of a Wolf-Rayet Star Through Detection of its Photometric Variability

, 2011
We report the serendipitous discovery of a heavily reddened Wolf-Rayet star that we name WR142b. While photometrically monitoring a cataclysmic variable, we detected weak variability in a nearby field star.
Colin Littlefield, Colin McClelland, Conti, Egan, G. H. “Howie” Marion, Hénault-Brunet, Indebetouw, J. Craig Wheeler, József Vinkó, Mauerhan, Peter Garnavich, Ralchenko, Rauw, Reipurth, Shara, Smith, Terrence Rettig, Wachter, Wolf   +18 more
core   +1 more source

K-band spectroscopy of pre-cataclysmic variables [PDF]

, 2007
Aims. There exists now substantial evidence for abundance anomalies in a number of cataclysmic variables (CVs), indicating that the photosphere of the secondary star incorporates thermonuclear processed material. However, the spectral energy distribution
Ali, B. T. Gänsicke, Beuermann, Bonfils, Bragaglia, Bruch, Bruch, C. Tappert, Carpenter, Cushing, Downes, F. P. Navarrete, Förster Schreiber, Gänsicke, Haefner, Haefner, Harrison, Harrison, Harrison, Hoard, Hoard, Ivanov, Kawka, Kawka, Kilkenny, Kirkpatrick, Kleinmann, L. Schmidtobreick, Leggett, Liebert, Marks, Maxted, Morales-Rueda, O'Donoghue, Oliver, Patterson, Pols, R. E. Mennickent, Ritter, Rodgers, Rousselot, Saffer, Schenker, Schreiber, Silvestri, Stocke, Tappert, Thorstensen   +47 more
core   +2 more sources

Can the EU Move ‘Beyond GDP’?

JCMS: Journal of Common Market Studies, Volume 64, Issue 2, Page 491-510, March 2026.
Abstract Since 2007, the European Union has devoted significant time and energy to the production and dissemination of new statistics designed to monitor social and environmental trends of various types. These initiatives have often been presented as part of a broader ‘beyond GDP agenda’, which challenges the centrality of economic growth, as measured ...
Christopher Holmes, Agnieszka Widuto
wiley   +1 more source

Water Parameters and Hydrodynamics in Rivers and Caves Hosting Astyanax mexicanus Populations Reveal Macro‐, Meso‐ and Microhabitat Characteristics

Ecology and Evolution, Volume 16, Issue 1, January 2026.
From 2009 to 2025, we have recorded the physicochemical parameters of the water and the hydrological regimes at localities hosting Astyanax mexicanus cavefish and surface fish populations in Mexico. Sampling 13 caves and 30 surface stations revealed strong signatures of the two macrohabitats, but also significant differences in specific water ...
Laurent Legendre, Stéphane Père, François Rebaudo, Luis Espinasa, Joël Attia, Sylvie Rétaux   +5 more
wiley   +1 more source

The Unique Helium Nova V445 Puppis Ejected ≫0.001 M⊙ in the Year 2000 and Will Not Become a Type Ia Supernova

The Astrophysical Journal
V445 Puppis (Nova Puppis 2000) is the only known example of a helium nova, where a layer of helium-rich gas accretes onto the surface of a white dwarf (WD) in a cataclysmic variable, with runaway helium burning making for the nova event. Speculatively, a
Bradley E. Schaefer
doaj   +1 more source

Overwinter gains in body fat challenge assumptions about winter nutrition in northern ungulates

Ecosphere, Volume 16, Issue 12, December 2025.
Abstract Animals in northern environments contend with seasonally variable resources and have evolved life histories to cope with the flush of nutrients in summer and scarcity in winter. Ungulates cope with seasonal variation in resources by accreting fat stores when resources are plentiful during the growing season and then mobilizing these stores to ...
Kristin Denryter, John A. Crouse
wiley   +1 more source

Physical parameters and orbital period variation of a newly discovered cataclysmic variable GSC 4560–02157 [PDF]

, 2016
GSC 4560–02157 is a new eclipsing cataclysmic variable with an orbital period of 0.265359 days. By using the published V − and R − band data together with our observations, we discovered that the O − C curve of GSC 4560–02157 may show a cyclic variation ...
Zhongtao Han, S. Qian, I. Voloshina, V. Metlov, Li-ying Zhu, Lin-Jia Li   +5 more
semanticscholar   +1 more source

Present‐Day Thermal State and Surface Heat Flux of the Moon

Journal of Geophysical Research: Planets, Volume 130, Issue 12, December 2025.
Abstract The concentration of volcanic material and Heat‐Producing Elements (HPE) on the lunar nearside surface suggests an asymmetry of interior properties and thermal history between the two hemispheres. However, the distribution of HPE beneath the surface and the processes that led to their potential enrichment on the nearside remain poorly ...
Sabatino Santangelo, Ana‐Catalina Plesa, Adrien Broquet, Doris Breuer, Matthias Grott   +4 more
wiley   +1 more source