Results 71 to 80 of about 431,245 (326)

Design and development of a learning progression about stellar structure and evolution

Physical Review Physics Education Research, 2018
[This paper is part of the Focused Collection on Astronomy Education Research.] In this paper we discuss the design and development of a learning progression (LP) to describe and interpret students’ understanding about stellar structure and evolution ...
Arturo Colantonio, Silvia Galano, Silvio Leccia, Emanuella Puddu, Italo Testa   +4 more
doaj   +1 more source

On compressive radial tidal forces

, 2007
Radial tidal forces can be compressive instead of disruptive, a possibility that is frequently overlooked in high level physics courses. For example, radial tidal compression can emerge in extended stellar systems containing a smaller stellar cluster ...
Binney J., Bondi H., Caimmi R., Combes F., Dermott S. F., Marco Masi, Misner C. W.   +6 more
core   +1 more source

Dual Optical Hyperbolicity of PdCoO2 and PdCrO2 Delafossite Single Crystals

Advanced Functional Materials, EarlyView.
In this work, the hyperbolic response of PdCoO₂ and PdCrO₂ delafossites is investigated for the first time. They exhibit dual hyperbolic regimes, one localized around a phonon absorption in the mid‐infrared spectral region, and the other extending into the visible range.
Salvatore Macis, Annalisa D'Arco, Eugenio Del Re, Lorenzo Mosesso, Maria Chiara Paolozzi, Vincenzo Stagno, Alexander McLeod, Yu Tao, Pahuni Jain, Yi Zhang, Fred Tutt, Marco Centini, Maria Cristina Larciprete, Chris Leighton, Stefano Lupi   +14 more
wiley   +1 more source

Imaging Stars by Performing Full-Stokes Optical Interferometric Polarimetry [PDF]

Journal of Astronomy and Space Sciences, 2012
Optical interferometry and polarimetry have separately provided new insights into stellar astronomy, especially in the fields of fundamental parameters and atmospheric models.
Nicholas M. Elias II, Stanislav S. Edel, Carol E. Jones, Frances E. Mackay, David Mozurkewich, Anders M. Jorgensen, Henrique R. Schmitt   +6 more
doaj   +1 more source

Ion‐Selective Microporous Membranes via One‐Step Copolymerization Enable High‐Performance Redox Flow Batteries

Advanced Functional Materials, EarlyView.
A scalable one‐step copolymerization strategy is developed to produce low‐cost microporous ion exchange membranes that boost both the efficiency and lifespan of flow batteries. When combined with organic electrolytes in aqueous systems, these membranes enable safe and cheap flow battery energy storage, supporting the widespread integration of renewable
Jiaye Liu, Chunchun Ye, Ying Ma, Rui Tan, Xiangwen Wang, Huiting Zhang, Peng Song, Quan‐Fu An   +7 more
wiley   +1 more source

Innovative practices in astronomy science education in China – A case study of BJP's science communication activities

Open Astronomy
As China’s only non-core K-12 science subject, astronomy education faces resource constraints. Beijing Planetarium (BJP), home to the Chinese Astronomical Society Popularization Committee, addresses this through tiered programs.
Chong Feng, Yan Dai, Bin Yang, Jie Meng, Yuanyuan Fang, Yilin Guo, Xiaoci Huang   +6 more
doaj   +1 more source

Higher depletion of lithium in planet host stars: no age and mass effect

, 2010
Recent observational work by Israelian et al. has shown that sun-like planet host stars in the temperature range 5700K < Teff < 5850K have lithium abundances that are significantly lower than those observed for "single" field stars. In this letter we use
Castro, Charbonnel, Chen, Chen, Claret, Cochran, Deliyannis, Dziembowski, Ecuvillon, Eggleton, Favata, Fernandes, Fischer, G. Israelian, Galeev, Garcia Lopez, Gilli, Gonzalez, Gonzalez, Israelian, Israelian, Israelian, J. Fernandes, King, Lambert, Lastennet, Luck, Mayor, Mordasini, Morel, N. C. Santos, Neves, Pasquini, Pinsonneault, Pollack, Randich, Randich, Ryan, S. G. Sousa, Santos, Santos, Santos, Santos, Sestito, Sousa, Takeda, Takeda, Udry, Valenti   +48 more
core   +1 more source

Synthesis and Electronic Structure of the Fractionally Occupied Double Perovskite EuTa2O6 with Ordered Europium Vacancies

Advanced Functional Materials, EarlyView.
Two‐dimensional electronic states are the foundation of modern semiconductor technology. Here, we report molecular‐beam epitaxy growth of fractional double perovskite, EuTa2O6. Reciprocal space mapping and transmission electron microscopy confirm a layered ordering of A‐site cations.
Tobias Schwaigert, Ali Barooni, Benjamin Gregory, Paul Malinowski, Anirudh Tenneti, Sonia Hasko, Brenan Palazzolo, Jeffrey W Hodgson, Brendan Faeth, Patrick M. Woodward, Kyle M. Shen, Andrej Singer, Maryam Ghazisaeidi, Salva Salmani‐Rezaie, Darrell G. Schlom, Kaveh Ahadi   +15 more
wiley   +1 more source

Ice Lithography: Recent Progress Opens a New Frontier of Opportunities

Advanced Functional Materials, EarlyView.
This review focuses on recent advancements in ice lithography, including breakthroughs in compatible precursors and substrates, processes and applications, hardware, and digital methods. Moreover, it offers a roadmap to uncover innovation opportunities for ice lithography in fields such as biological, nanoengineering and microsystems, biophysics and ...
Bingdong Chang, Gwendoline A. E. Anand, Rubaiyet Haque, Dylan A. Chiaro, Mona Sharma, Andrew R. Williams, Frank Niklaus, Daryl W. Yee, Gavin M. King, Anpan Han   +9 more
wiley   +1 more source

Lyα Emission from K and M Dwarfs: Intrinsic Profiles, Variability, and Flux in the Habitable Zone

The Astrophysical Journal
Lyman-alpha (Ly α ) is the most prominent ultraviolet (UV) emission line in low-mass stars, playing a crucial role in exoplanet atmospheric photochemistry, heating, and escape.
Sarah Peacock, Travis S. Barman, R. O. Parke Loyd, Adam C. Schneider, Allison Youngblood, Kenneth G. Carpenter, Evgenya L. Shkolnik   +6 more
doaj   +1 more source