Results 61 to 70 of about 177,797 (288)

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

A General Overview for Localizing Short Gamma-Ray Bursts with a CubeSat Mega-Constellation

Frontiers in Astronomy and Space Sciences, 2020
The gamma-ray burst monitor (GBM) on the Fermi Gamma-Ray Space Telescope, for the first time, detected a short gamma ray burst (SGRB) signal that accompanies a gravitational wave signal GW170817 in 2017.
Fadil Inceoglu, Fadil Inceoglu, Fadil Inceoglu, Néstor J. Hernández Marcano, Rune H. Jacobsen, Christoffer Karoff   +5 more
doaj   +1 more source

Anomalous Spin‐Optical Helical Effect in Ti‐Based Kagome Metal

Advanced Materials, EarlyView.
The kagome lattice hosts diverse correlated quantum states, including elusive loop currents. We report spin‐handedness selective signals in CsTi3Bi5, termed the anomalous spin‐optical helical effect, surpassing conventional spin responses. Arising from light helicity coupled to spin‐orbital correlations, this effect provides a sensitive, indirect probe
Federico Mazzola, Wojciech Brzezicki, Chiara Bigi, Armando Consiglio, Luciano Jacopo D'Onofrio, Maria Teresa Mercaldo, Adam Kłosiński, François Bertran, Patrick Le Fèvre, Oliver J. Clark, Mark T. Edmonds, Manuel Tuniz, Alessandro De Vita, Vincent Polewczyk, Jeppe B. Jacobsen, Henrik Jacobsen, Jill A. Miwa, Justin W. Wells, Anupam Jana, Ivana Vobornik, Jun Fujii, Niccolo Mignani, Narges Tarakameh Samani, Alberto Crepaldi, Giorgio Sangiovanni, Anshu Kataria, Tommaso Morresi, Samuele Sanna, Pietro Bonfá, Brenden R. Ortiz, Ganesh Pokharel, Stephen D. Wilson, Domenico Di Sante, Carmine Ortix, Mario Cuoco   +34 more
wiley   +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

Current Switching of Topological Spin Chirality in the van der Waals Antiferromagnet Co1/3TaS2

Advanced Materials, EarlyView.
Spin chirality plays a central role in quantum magnetism, governing spin winding and generating real‐space Berry phases. We propose the intriguing concept of current‐switching spin chirality and demonstrate it via unconventional intrinsic self‐spin‐orbit‐torque in pristine Co1/3TaS2, purely by electrical current and with high energy efficiency.
Kai‐Xuan Zhang, Seungbok Lee, Woonghee Cho, Je‐Geun Park   +3 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

Electric‐Current‐Assisted Nucleation of Zero‐Field Hopfion Rings

Advanced Materials, EarlyView.
This work reports a novel and efficient nucleation protocol for 3D localized topological magnetic solitons‐hopfion rings in chiral magnets using pulsed electric currents. By using Lorentz transmission electron microscopy and topological analysis, we report characteristic features and extraordinary stability of hopfion rings in zero or inverted external
Xiaowen Chen, Dongsheng Song, Filipp N. Rybakov, Nikolai S. Kiselev, Long Li, Wen Shi, Rui Wu, Xuewen Fu, Olle Eriksson, Stefan Blügel, Rafal E. Dunin‐Borkowski, Haifeng Du, Fengshan Zheng   +12 more
wiley   +1 more source

Pulsating star research from Antarctica

EPJ Web of Conferences, 2017
This invited talk discusses the pulsating star research from the heart of Antarctica and the scientific polar challenges in the extreme environment of Antarctica, and how the new polar technology could cope with unresolved stellar pulsation enigmas and ...
Chadid Merieme
doaj   +1 more source

Chemical enrichment and star formation in the Milky Way disk III. Chemodynamical constraints

, 2004
In this paper, we investigate some chemokinematical properties of the Milky Way disk, by using a sample composed by 424 late-type dwarfs. We show that the velocity dispersion of a stellar group correlates with the age of this group, according to a law ...
Asiain, Avila-Reese, Barbier-Brossat, Bassino, Berczik, Berczik, Bizyaev, Burkert, Byl, Byl, C. Flynn, Carlberg, Carlberg, Carlberg, Chiba, Cubarsí, Dehnen, Dehnen, Dehnen, Dempster, Duflot, Duflot, Edvardsson, Eggen, Elmegreen, Feast, Fehrenbach, Fehrenbach, Flynn, Font, Fridman, Friedli, Fujimoto, Fux, G. Hensler, Gerssen, Gerssen, Gilmore, Gratton, Gómez, H. J. Rocha-Pinto, Hartmann, Hilton, House, Hänninen, Ibata, J. Hänninen, J. Scalo, Jahreiß, Jeffries, Jenkins, Jenkins, Johnson, Kato, Knude, Kokubo, Kroupa, Köppen, Köppen, Lacey, Lacey, Larson, Larson, Mac Low, Maciel, Majewski, Mayor, Mayor, Mayor, Meusinger, Moreno, Mühlbauer, Nemec, Newberg, Nordström, Nordström, Núñez, Oblak, Ojha, Ostriker, Raiteri, Ratnatunga, Robin, Rocha-Pinto, Rocha-Pinto, Rocha-Pinto, Rocha-Pinto, Rocha-Pinto, Roman, Roman, Samland, Scalo, Sellwood, Semenzato, Shapiro, Skuljan, Soderblom, Sotnikova, Spitzer, Spitzer, Steinmetz, Steinmetz, Taylor, Tinsley, Velázquez, Villumsen, W. J. Maciel, Wielen, Wielen, Yanny, Yasutomi, Yasutomi, Yuan   +112 more
core   +1 more source

Photocatalytic Water Splitting on the Lunar Surface: Prospects for In Situ Resource Utilization

Advanced Materials Interfaces, EarlyView.
Water has been found in craters on the moon nearby locations which are illuminated >80% of the time. Photocatalysis uses energy from sunlight to drive chemical reactions such as water splitting to produce oxygen and hydrogen. It is a scalable technology that requires lighter equipment and utilizes resources available on the moon. ABSTRACT The discovery
Ranjani Kalyan, Thomas D. Small, Gregory F. Metha, Mahmoud Adel Hamza, Thomas J. O'Dea, Yideng Shen, Cameron J. Shearer   +6 more
wiley   +1 more source