Results 71 to 80 of about 261,856 (238)

Feasibility Study for Application of Digitized Henize Mt. Wilson Michigan Southern Sky Hα$$ \boldsymbol{\alpha} $$ Survey Low‐Dispersive Spectral Plates for Searches for Anomalous and Highly Redshifted Objects

Astronomische Nachrichten, EarlyView.
ABSTRACT The goal of this study is to confirm the feasibility of the use of digitized low dispersive MtWilson Michigan Southern Sky Hα$$ \alpha $$ survey astronomical photographic plates for modern astrophysical research. The detection of highly redshifted objects, such as early galaxies and quasars, is fundamental to understanding the universe's ...
Tauseef Ahmad Zafar, René Hudec, Marta Mara Merono Vidagany, Fehmi Mejri   +3 more
wiley   +1 more source

Evaluating the Feasibility of Yanbu’ul Qur’an Observatory in Menawan Kudus for Lunar Crescent Observation

Al-Hilal
The Yanbu’ul Qur’an Observatory in Menawan Kudus, Indonesia, functions as a site for crescent moon (rukyat al-hilāl) observations and Islamic astronomy education.
Muhammad Maulana Iqbal, Muhammad Akmal Habib, Fajri Zulia Ramdhani   +2 more
doaj   +1 more source

Hidden No More: Spotlight on Tidal Disruption Events in Active Galactic Nuclei

Astronomische Nachrichten, EarlyView.
ABSTRACT Tidal disruption events (TDEs) are typically discovered in previously quiescent galaxies. However, earlier studies have revealed a handful of TDEs occurring in pre‐existing active galactic nuclei (AGN). We discuss AT2019aalc, a promising TDE candidate in an AGN, and compare it to similar sources.
Patrik Milán Veres
wiley   +1 more source

One century of cosmic rays – A particle physicist's view

EPJ Web of Conferences, 2015
Experiments on cosmic rays and the elementary particles share a common history that dates back to the 19th century. Following the discovery of radioactivity in the 1890s, the paths of the two fields intertwined, especially during the decades after the ...
Sutton Christine
doaj   +1 more source

Kaluza-Klein Dark Matter, Electrons and Gamma Ray Telescopes

, 2004
Kaluza-Klein dark matter particles can annihilate efficiently into electron-positron pairs, providing a discrete feature (a sharp edge) in the cosmic $e^+ e^-$ spectrum at an energy equal to the particle's mass (typically several hundred GeV to one TeV).
Abbiendi G, Abel S (SUGRA Working Group Collaboration), Baltz E A Edsjo J Freese K Gondolo P, Bergstrom L Bringmann T Eriksson M Gustafsson M, Bergstrom L Edsjo J Ullio P, Birkedal A Matchev K Perelstein M, Carosi G, Coutu S (HEAT-pbar Collaboration), Dan Hooper, Donato F Fornengo N Maurin D Salati P Taillet R, Edward A Baltz, Gondolo P, Hooper D Dingus B L, Hooper D Kribs G D, Hooper D Silk J, Longair M S, Picozza P, Profumo S, Servant G   +18 more
core   +1 more source

Roles of 2D halide perovskites in 2D/3D heterojunctions for high‐performance perovskite solar cells

Bulletin of the Korean Chemical Society, EarlyView.
This review establishes a design framework for two‐dimensional (2D)/three‐dimensional (3D) perovskite heterojunctions, redefining the 2D perovskite layer as an active semiconductor component. We classify 2D structures by spacer chemistry and analyze their roles within the heterojunction.
Seungmin Lee, Oui Jin Oh, Dong Hyun Kim, Dong Hun Kang, Jun Hong Noh   +4 more
wiley   +1 more source

Formation, stability, and dynamics of vector bright solitons in a trapless Bose–Einstein condensate with spin–orbit coupling

New Journal of Physics, 2020
We consider a binary self-attractive Bose–Einstein condensate with Rashba spin–orbit coupling (SOC) in two-dimensional (2D) free space. The formation, stability, and dynamics of vector bright solitons are elucidated through numerical analysis and ...
Ya-Jun Wang, Lin Wen, Guang-Ping Chen, Shou-Gang Zhang, Xiao-Fei Zhang   +4 more
doaj   +1 more source

Early evolutionary history of the seed

Biological Reviews, EarlyView.
ABSTRACT The seed is an essential stage in the life history of gymnospermous and angiospermous plants, facilitating both their survival and dispersal. We reappraise knowledge of the evolutionary history of the gymnospermous seed, from its origin in the late Devonian through to the well‐known end‐Permian extinctions – an interval encompassing the ...
Richard M. Bateman, Alan R. T. Spencer, Jason Hilton   +2 more
wiley   +1 more source

Training of Instrumentalists and Development of New Technologies on SOFIA

, 2009
This white paper is submitted to the Astronomy and Astrophysics 2010 Decadal Survey (Astro2010)1 Committee on the State of the Profession to emphasize the potential of the Stratospheric Observatory for Infrared Astronomy (SOFIA) to contribute to the ...
Allamandola, Louis J., Baluteau, Jean-Paul, Becklin, Eric E., Bjoraker, Gordon, Burton, Michael, Caroff, Lawrence J., Ceccarelli, Cecilia, Churchwell, Edward B., Clemens, Dan P., Cohen, Martin, Cruikshank, Dale P., Dinerstein, Harriet L., Dunham, Edward W., Erickson, Edwin F., Fazio, Giovanni G., Gatley, Ian, Gehrz, Robert D., Genzel, Reinhard, Graf, Paul, Greenhouse, Matthew A., Harper, Doyal A., Harvey, Paul M., Harwit, Martin, Hildebrand, Roger H., Hollenbach, David J., Lane, Adair P., Larson, Harold P., Lord, Steven D., Madden, Suzanne, Melnick, Gary J., Neufeld, David A., Olkin, Catherine B., Packham, Christopher C., Roellig, Thomas L., Roeser, Hans-Peter, Sandford, Scott A., Sellgren, Kristen, Simpson, Janet P., Storey, John W. V., Telesco, Charles M., Tielens, Alexander G. G. M., Tokunaga, Alan T., Townes, Charles H., Walker, Christopher K., Werner, Michael W., Whitcomb, Stanley E., Wolf, Juergen, Woodward, Charles E., Young, Erick T., Zmuidzinas, Jonas   +49 more
core   +1 more source

Talin1 Adhesion Morphology and Colocalization With Tensin3 Are Largely Unaffected by Polyacrylamide Substrate Stiffness

Cytoskeleton, EarlyView.
ABSTRACT Cells sense the stiffness of their extracellular matrix (ECM) and adapt their behavior accordingly. We investigated how ECM stiffness affects the spatial organization of talin1, a key mechanosensitive focal adhesion protein. Using polyacrylamide (PA) hydrogels with tunable stiffnesses (0.2–188 kPa), we analyzed cell morphology, migration ...
Joanna Hajduk, Patrycja Twardawa, Sylwia Bobis‐Wozowicz, Marta Szewczyk, Zenon Rajfur, Zbigniew Baster   +5 more
wiley   +1 more source