Results 31 to 40 of about 75,171 (318)

Close-In Substellar Companions and the Formation of sdB-Type Close Binary Stars

Acta Polytechnica CTU Proceedings, 2015
The sdB-type close binaries are believed to have experienced a common-envelope phase and may evolve into cataclysmic binaries (CVs). About 10% of all known sdB binaries are eclipsing binaries consisting of very hot subdwarf primaries and low-mass ...
L. Y. Zhu, S. B. Qian, E.-G. Zhao, E. Fernández Lajús, Z.-T. Han   +4 more
doaj   +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

Variable stars in the Open Cluster M11 (NGC 6705)

, 2007
V-band time-series CCD photometric observations of the intermediate-age open cluster M11 were performed to search for variable stars. Using these time-series data, we carefully examined light variations of all stars in the observing field.
Breger M., C.‐U. Lee, Frandsen S., Frandsen S., Hoffmeister C., J.‐R. Koo, Kaluzny J., McNamara B. J., Rodriguez E., Rodriguez E., Rucinski S. M., S.‐C. Rey, S.‐L. Kim, Vilhu O., Viskum M., Y. B. Kang, Y. H. Kim, Y.‐B. Jeon   +17 more
core   +1 more source

The ELM Survey South. II. Two Dozen New Low-mass White Dwarf Binaries

The Astrophysical Journal, 2023
We present the results from our ongoing spectroscopic survey targeting low-mass white dwarf binaries, focusing on the southern sky. We used a Gaia DR2- and eDR3-based selection and identified 28 new binaries, including 19 new extremely low-mass (ELM ...
Alekzander Kosakowski, Warren R. Brown, Mukremin Kilic, Thomas Kupfer, Antoine Bédard, A. Gianninas, Marcel A. Agüeros, Manuel Barrientos   +7 more
doaj   +1 more source

The extraneous eclipses on binary light curves: KIC 5255552, KIC 10091110, and KIC 11495766

, 2017
Aims. We aim to find more eclipsing multiple systems and obtain their parameters, thus increasing our understanding of multiple systems. Methods. The extraneous eclipses on the \textit{kepler} binary light curves indicating extraneous bodies were ...
Jiang, L. Q., Qian, S. B., Sun, L. L., Wang, S. M., Wu, Y., Zhang, J.   +5 more
core   +1 more source

The TESS Ten Thousand Catalog: 10,001 Uniformly Vetted and Validated Eclipsing Binary Stars Detected in Full-frame Image Data by Machine Learning and Analyzed by Citizen Scientists

The Astrophysical Journal Supplement Series
The Transiting Exoplanet Survey Satellite (TESS) has surveyed nearly the entire sky in full-frame image mode with a time resolution of 200 s to 30 minutes and a temporal baseline of at least 27 days.
Veselin B. Kostov, Brian P. Powell, Aline U. Fornear, Marco Z. Di Fraia, Robert Gagliano, Thomas L. Jacobs, Julien S. de Lambilly, Hugo A. Durantini Luca, Steven R. Majewski, Mark Omohundro, Jerome Orosz, Saul A. Rappaport, Ryan Salik, Donald Short, William Welsh, Svetoslav Alexandrov, Cledison Marcos da Silva, Erika Dunning, Gerd Gühne, Marc Huten, Michiharu Hyogo, Davide Iannone, Sam Lee, Christian Magliano, Manya Sharma, Allan Tarr, John Yablonsky, Sovan Acharya, Fred Adams, Thomas Barclay, Benjamin T. Montet, Susan Mullally, Greg Olmschenk, Andrej Prša, Elisa Quintana, Robert Wilson, Hasret Balcioglu, Ethan Kruse, The Eclipsing Binary Patrol Collaboration   +38 more
doaj   +1 more source

Eclipsing binary stars in the era of massive surveys First results and future prospects

EPJ Web of Conferences, 2017
Our thinking about eclipsing binary stars has undergone a tremendous change in the last decade. Eclipsing binary stars are one of nature’s best laboratories for determining the fundamental physical properties of stars and thus for testing the predictions
Papageorgiou Athanasios, Catelan Márcio, Ramos Rodrigo Contreras, Drake Andrew J.   +3 more
doaj   +1 more source

The EBLM Project—From False Positives to Benchmark Stars and Circumbinary Exoplanets

Universe, 2023
The EBLM project aims to characterise very-low-mass stars that are companions to solar-type stars in eclipsing binaries. We describe the history and motivation for this project, the methodology we use to obtain the precise mass, radius, and effective ...
Pierre F. L. Maxted, Amaury H. M. J. Triaud, David V. Martin   +2 more
doaj   +1 more source

Correlation of the differential expression of PIK3R1 and its spliced variant, p55α, in pan‐cancer

Molecular Oncology, EarlyView.
PIK3R1 undergoes alternative splicing to generate the isoforms, p85α and p55α. By combining large patient datasets with laboratory experiments, we show that PIK3R1 spliced variants shape cancer behavior. While tumors lose the protective p85α isoform, p55α is overexpressed, changes linked to poorer survival and more pronounced in African American ...
Ishita Gupta, Yang Song, Madeleine Ndahayo, Anirudh Saxena, Theresa Guo, Dylan Z. Kelley, Jessica Gore, Andrew Hennigan, Alexa Anderson, John C. Papadimitriou, Daria A. Gaykalova   +10 more
wiley   +1 more source

Eclipses

Góndola, Enseñanza y Aprendizaje de las Ciencias
El libro escrito por William Enrique Cepeda Peña es un estudio detallado sobre los eclipses de Sol y Luna en Colombia, que incluye un cálculo preciso de las zonas de penumbra y sombra, así como tablas de predicción hasta el año 2100. Está dividido en cuatro partes que ofrecen una explicación exhaustiva de estos fenómenos astronómicos, basada en ...
Daniel Kunth, Elena Terlevich
  +6 more sources