Results 61 to 70 of about 234,306 (282)

Detection of an exoplanet around the evolved K giant HD 66141

, 2012
Aims. We have been carrying out a precise radial velocity (RV) survey for K giants to search for and study the origin of the lowamplitude and long-periodic RV variations. Methods. We present high-resolution RV measurements of the K2 giant HD 66141 from
Han, I., Kim, K. -M., Lee, B. -C., Mkrtichian, D. E., Park, M. -G.   +4 more
core   +1 more source

Low‐Symmetry Weyl Semimetals: A Path to Ideal Topological States

Advanced Functional Materials, EarlyView.
This study presents a theoretical framework for realizing ideal Weyl semimetals, where Weyl nodes are well‐isolated at the Fermi level. The approach is exemplified in the low‐symmetry material Cu2SnSe3, which exhibits tunable topological phases, current‐induced orbital magnetization, and a strong circular photogalvanic effect, making it a promising ...
Darius‐Alexandru Deaconu, Varun Shah, Rodion Vladimirovich Belosludov, Mohammad Saeed Bahramy   +3 more
wiley   +1 more source

A Review of the Characteristics of Light Pollution: Assessment Technique, Policy, and Legislation

Energies
Light pollution from the use of artificial lighting poses significant impacts on human health, traffic safety, ecological environment, astronomy, and energy use.
Ying Hao, Peiyao Wang, Zhongyao Zhang, Zhiming Xu, Dagong Jia   +4 more
doaj   +1 more source

Spectral Formation in Accreting X-Ray Pulsars: Bimodal Variation of the Cyclotron Energy with Luminosity

, 2012
Accretion-powered X-ray pulsars exhibit significant variability of the Cyclotron Resonance Scattering Feature (CRSF) centroid energy on pulse-to-pulse timescales, and also on much longer timescales. Two types of spectral variability are observed.
Araya-Góchez, Arons, Basko, Becker, Becker, Blum, Burnard, C. Ferrigno, Caballero, D. Klochkov, Davidson, Ferrigno, G. Schönherr, Giacconi, Harding, I. Caballero, Imamura, Isenberg, J. Wilms, Klochkov, Lamb, Langer, M. T. Wolff, Mihara, Mowlavi, Negueruela, Negueruela, Nelson, O. Nishimura, P. A. Becker, P. Kretschmar, Parkes, R. Staubert, Reynolds, Shakura, Staubert, Steele, Tananbaum, Trümper, Tsygankov, Tsygankov, Vasco, Wang, Yamamoto   +43 more
core   +1 more source

What Makes Some People Think Astrology Is Scientific? [PDF]

, 2010
Citizens in both North America and Europe are apt to read horoscope columns in newspapers and magazines. While some people read these casually and purely for entertainment, some believe that astrology has scientific status and can provide real insight ...
Allum, Nick
core   +1 more source

Formation of 2D Electron Gas at a Non‐Polar Perovskite Oxide Interface: SrHfO3/BaSnO3

Advanced Functional Materials, EarlyView.
Through experiments and Poisson‐Schrödinger simulations, 2D electron gas formed at the non‐polar SrHfO3/BaSnO3 interface is observed. A large conduction band offset enables modulation doping by the intrinsic deep donors in SrHfO3, resulting in carrier confinement in BaSnO3 without relying on interfacial polarization or termination‐layer engineering ...
Jongkyoung Ko, Oliver Bierwagen, Wonwoo Suh, Jeewon B. Choi, Celesta S. Chang, Kookrin Char   +5 more
wiley   +1 more source

High Angular Resolution Stellar Imaging with Occultations from the Cassini Spacecraft I: Observational Technique

, 2013
We present novel observations utilising the Cassini spacecraft to conduct an observing campaign for stellar astronomy from a vantage point in the outer solar system. By exploiting occultation events in which Mira passed behind the Saturnian ring plane as
Hedman, Matthew M., Lloyd, James P., Nicholson, Philip D., Stewart, Paul N., Tuthill, Peter G.   +4 more
core   +1 more source

Planck pre-launch status: calibration of the Low Frequency Instrument flight model radiometers [PDF]

, 2010
The Low Frequency Instrument (LFI) on-board the ESA Planck satellite carries eleven radiometer subsystems, called Radiometer Chain Assemblies (RCAs), each composed of a pair of pseudo-correlation receivers.
Leahy, John, {Aja}, B, {Artal}, E, {Balasini}, M, {Battaglia}, P, {Bernardino}, T, {Bersanelli}, M, {Blackhurst}, E, {Boschini}, L, {Butler}, R C, {Cappellini}, B, {Cavaliere}, F, {Colin}, A, {Colombo}, F, {Cuttaia}, F, {D'Arcangelo}, O, {Davis}, R J, {de La Fuente}, L, {Edgeley}, J, {Frailis}, M, {Franceschet}, C, {Franceschi}, E, {Gaier}, T, {Galeotta}, S, {Galtress}, A, {Gregorio}, A, {Hoyland}, R, {Hughes}, N, {Jukkala}, P, {Kettle}, D, {Kilpia}, V-H, {Laaninen}, M, {Lapolla}, P, {Lawrence}, C R, {Lawson}, D, {Leahy}, J P, {Leonardi}, R, {Leutenegger}, P, {Levin}, S, {Lowe}, S R, {Maino}, D, {Malaspina}, M, {Mandolesi}, N, {Maris}, M, {Mediavilla}, A, {Meinhold}, P, {Mendes}, L, {Mennella}, A, {Miccolis}, M, {Morgante}, G, {Pagan}, L, {Pascual}, J P, {Pasian}, F, {Pecora}, M, {Pospieszalski}, M, {Poutanen}, T, {Roddis}, N, {Salmon}, M J, {Sandri}, M, {Seiffert}, M, {Silvestri}, R, {Simonetto}, A, {Sjoman}, P, {Sozzi}, C, {Stringhetti}, L, {Terenzi}, L, {Tomasi}, M, {Tuovinen}, J, {Valenziano}, L, {Varis}, J, {Villa}, F, {Wilkinson}, A, {Winder}, F, {Zacchei}, A, {Zonca}, A   +74 more
core   +3 more sources

Chemo‐Mechanical Coupling in Hydrogels: Dynamics in the Diffusion‐Limited Regime

Advanced Functional Materials, EarlyView.
A time‐dependent continuum model is developed to capture the transient swelling dynamics of chemo‐mechanical hydrogels. By coupling chemical reactions, solvent transport, and polymer deformation, volume phase transitions, reaction kinetics, and transient mechanical instabilities are analyzed.
Yao Xiong, Aaveg Aggarwal, Monica Olvera de la Cruz   +2 more
wiley   +1 more source

The Colour of the Night Sky

Journal of Imaging, 2020
The measurement of night sky quality has become an important task in night sky conservation. Modern measurement techniques involve mainly a calibrated digital camera or a spectroradiometer.
Zoltán Kolláth, Dénes Száz, Kai Pong Tong, Kornél Kolláth   +3 more
doaj   +1 more source