Results 71 to 80 of about 234,306 (282)

Diurnal and Seasonal Variations in Mid-Latitude Geomagnetic Field During International Quiet Days: BOH Magnetometer [PDF]

Journal of Astronomy and Space Sciences, 2012
Korea Astronomy and Space Science Institute researchers have installed and operated magnetometers at Bohyunsan Observatory to measure the Earth's magnetic field variations in South Korea.
Junga Hwang, Hyang-Pyo Kim, Young-Deuk Park   +2 more
doaj   +1 more source

The column density towards LMC X-1

, 2009
We measure the neutral absorption towards the black hole X-ray binary system LMC X-1 from six archival soft X-ray spectra obtained with the gratings and/or CCD detectors on Chandra, XMM-Newton, and Swift.
Barragan, Laura, Hanke, Manfred, Nowak, Michael A., Schulz, Norbert S., Wilms, Joern   +4 more
core   +1 more source

Scales of the magnetic fields in the quiet Sun [PDF]

, 2012
Context: The presence of a turbulent magnetic field in the quiet Sun has been unveiled observationally using different techniques. The magnetic field is quasi-isotropic and has field strengths weaker than 100G. It is pervasive and may host a local dynamo.
A. López Ariste, A. Sainz Dalda, Asensio Ramos, Auvergne, Carroll, Carroll, Domínguez Cerdeña, Frisch, Frisch, Frisch, Graham, Knobloch, Kosugi, Lites, López Ariste, Martínez González, Martínez González, Martínez González, Martínez Pillet, Nakagawa, Nordlund, Parker, Petrovay, Sainz Dalda, Sampoorna, Sanchez Almeida, Solanki, Solanki, Stenflo, Stenflo, Sánchez Almeida, Sánchez Almeida, Trujillo Bueno, Tsuneta, Viticchié   +34 more
core   +1 more source

Ferroelectricity in Single‐Crystalline BaTiO3 Nanodisks on Silicon

Advanced Functional Materials, EarlyView.
Ferroelectricity is studied in 20 nm thick single crystalline BaTiO3 nanodisks when scaling their diameter from ≈ 400 down to 100 nm. For 100 nm diameter, the vertical polarization component adopts three distinct patterns, and the lateral one shows a rotational invariance in‐plane, suggesting a combination of center‐type and flux‐closure domains.
Ibukun Olaniyan, Jürgen Albert, Beatriz Canabarro, Haidong Lu, Sven Wiesner, Nikolay Cherkashin, Alexei Gruverman, Sylvie Schamm‐Chardon, Dong‐Jik Kim, Catherine Dubourdieu   +9 more
wiley   +1 more source

Integrated Study of X-Ray Spectrum and Time Lags for HBL Mrk 421 within the Framework of the Multiple-zone Leptonic Model

The Astrophysical Journal
We present the timing analysis of 10 archived XMM-Newton observations with an exposure of >40 ks of Markarian 421. Mrk 421 is the brightest high-frequency-peaked BL Lac object emitting in X-rays produced by electrons accelerated in the innermost regions ...
Wen Hu, Jia-Lai Kang, Zhen-Yi Cai, Jun-Xian Wang, Zhen-Bo Su, Guang-Cheng Xiao   +5 more
doaj   +1 more source

Intranight optical variability of radio-quiet BL Lacertae objects

, 2015
Aims: Intranight variation (or microvariation) is a common phenomenon of radio-loud BL Lac objects. However, it is not clear whether the recently found radio-quiet BL Lac objects have the same properties.
Liu, Yuan, Zhang, Jin, Zhang, Shuang Nan
core   +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

Statistics of Ionospheric Storms Using GPS TEC Measurements Between 2002 and 2014 in Jeju, Korea [PDF]

Journal of Astronomy and Space Sciences, 2015
Using the Total Electron Content (TEC) data from the Global Navigation Service System (GNSS) site in Jeju, operated by the Korea Astronomy and Space Science Institute (geographic location: 33.3° N, 126.5° E; geomagnetic location: 23.6° N) for 2002 ...
Jong-Kyun Chung, Byung-Kyu Choi
doaj   +1 more source

Measuring space-time variation of the fundamental constants with redshifted submillimetre transitions of neutral carbon

, 2011
We compare the redshifts of neutral carbon and carbon monoxide in the redshifted sources in which the fine structure transition of neutral carbon, [CI], has been detected, in order to measure space-time variation of the fundamental constants.
A. A. Stark, A. Tanna, Ao, Barvainis, Berengut, Bertoldi, Blain, Blain, Bothwell, Casey, Cooksy, Coppin, Cowie, Cox, Curran, Curran, Daddi, Daddi, Danielson, De Breuck, De Breuck, Downes, Downes, Emonts, Engargiola, F. E. Koch, Frayer, Frayer, Frayer, Garrett, Genzel, Gerin, Greve, Hainline, Henkel, Ikeda, Iono, Iono, Israel, Ivison, J. C. Berengut, J. K. Webb, Kanekar, Klamer, Klein, Kneib, Lestrade, Lestrade, Levshakov, Levshakov, Maiolino, Maiolino, Murphy, Murphy, Ofek, Ohta, Ojha, Omont, Papadopoulos, Papadopoulos, Papadopoulos, Pety, Riechers, Riechers, Riechers, S. J. Curran, Scoville, Sheth, Solomon, Spergel, Stutzki, Tacconi, Tacconi, Uzan, V. V. Flambaum, Walter, Walter, Weiß, Weiß, Weiß, White, Willott, Yamamoto, Yan   +83 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