Results 31 to 40 of about 141,058 (288)

PROTOCALC, a W-band Polarized Calibrator for Cosmic Microwave Background Telescopes: Application to Simons Observatory and CLASS

The Astrophysical Journal Supplement Series
Current- and next-generation cosmic microwave background (CMB) experiments will measure polarization anisotropies with unprecedented sensitivities. The need for high precision in these measurements underscores the importance of gaining a comprehensive ...
Gabriele Coppi, Nadia Dachlythra, Federico Nati, Rolando Dünner-Planella, Alexandre E. Adler, Josquin Errard, Nicholas Galitzki, Yunyang Li, Matthew A. Petroff, Sara M. Simon, Ema Tsang King Sang, Amalia Villarrubia Aguilar, Edward J. Wollack, Mario Zannoni   +13 more
doaj   +1 more source

Nearly a decade of groundbreaking speckle interferometry at the international Gemini observatory

Frontiers in Astronomy and Space Sciences
Since its inception, speckle interferometry has revolutionized high-resolution astronomical imaging, overcoming atmospheric challenges to achieve the diffraction limits of telescopes. Almost a decade ago, in 2018, a pair of speckle cameras – ‘Alopeke and
Steve B. Howell, Clara E. Martínez-Vázquez, Elise Furlan, Nicholas J. Scott, Rachel A. Matson, Colin Littlefield, Colin Littlefield, Catherine A. Clark, Kathryn V. Lester, Zachary D. Hartman, David R. Ciardi, Sarah J. Deveny, Sarah J. Deveny   +12 more
doaj   +1 more source

Linking the Variation of Sediment Accumulation Rate to Short Term Sea-Level Change Using Cyclostratigraphy: Case Study of the Lower Berriasian Hemipelagic Sediments in Central Tunisia (Southern Tethys)

Frontiers in Earth Science, 2021
High-resolution magnetic susceptibility and % CaCO3 records (5 to 10 cm sampling interval) are used to track astronomical cycles from a Lower Berriasian record from central Tunisia.
Hamdi Omar, Hamdi Omar, Anne-Christine Da Silva, Chokri Yaich, Chokri Yaich   +4 more
doaj   +1 more source

Near-infrared integral-field spectroscopy of HD209458b [PDF]

, 2006
We present first results of an exploratory study to use integral field spectroscopy to observe extrasolar planets. We focus on transiting "Hot Jupiters" and emphasize the importance of observing strategy and exact timing.
Angerhausen, Daniel, Iserlohe, Christof, Krabbe, Alfred   +2 more
core   +2 more sources

Nanoscale Mapping of Plasmonic Charge Transport in Nano‐Resonators Based on Resistive Switching Materials

Advanced Functional Materials, EarlyView.
In this strategy, a conductive nano‐probe is employed to induce nanoscale phase transitions and map the nanoscale conductivity and trap density of GST films. By utilizing the contrasting properties of phase‐change states, nano‐resonators are fabricated that exhibit plasmonic conduction and dramatically different transport characteristics.
Sunwoo Bang, Seunghyo Park, Shashank Shekhar, Yuhyeon Oh, Seunghun Hong   +4 more
wiley   +1 more source

Back-illuminated Light-spot-mapping Algorithm for Dual Rotation Robotic Fiber Positioners Based on an Artificial Probability Potential Field Method

The Astronomical Journal
Back-illuminated spot mapping is essential for observations with modern spectroscopic survey telescopes. In the fiber position detection system, after the fiber view camera (FVC) detects the positions of the light spots from the robotic fiber positioners
Yingfu Wang, Jiahao Zhou, Ziming Liu, Rongfeng Chen, Jiacheng Xie, Hongzhuan Hu, Jianping Wang, Zhigang Liu, Jiaru Chu, Feifan Zhang, Haotong Zhang, Yong Zhang, Zengxiang Zhou   +12 more
doaj   +1 more source

Uncovering the Origin of Efficiency Roll‐Off in TADF OLEDs

Advanced Functional Materials, EarlyView.
OLEDs based on thermally activated delayed fluorescent (TADF) materials often suffer from a severe drop in efficiency at high brightness levels. This work presents a technique to uncover the source of this efficiency drop, and quantifies the exciton‐exciton and exciton‐polaron annihilation processes responsible for efficiency losses in our TADF OLEDs ...
Liam G. King, Kou Yoshida, Arvydas Ruseckas, Ifor D. W. Samuel   +3 more
wiley   +1 more source

Modeling the Wavelength Dependence of Pixel Response Nonuniformity of a CCD Sensor

The Astronomical Journal
Precision measurements in astronomy require stringent control of systematics such as those arising from imperfect correction of sensor effects.
Zun Luo, Wei Du, Baocun Chen, Xianmin Meng, Hu Zhan   +4 more
doaj   +1 more source

Adaptive Optics Simulations for Siding Spring

, 2012
Using an observational derived model optical turbulence profile (model-OTP) we have investigated the performance of Adaptive Optics (AO) at Siding Spring Observatory (SSO), Australia.
Goodwin, Michael, Jenkins, Charles, Lambert, Andrew   +2 more
core   +1 more source

Halide‐Dependent Photoluminescence and Heavy‐Atom Effects in Low‐Melting Organic–Inorganic Manganese Halides

Advanced Functional Materials, EarlyView.
Two pyridinium‐based ionic liquid templated hybrid manganese halides, (C4Py)2[MnCl4] and (C4Py)2[MnBr4], display similar bulk structures but show significantly different photoluminescence behaviors due to the bromine heavy‐atom effect. Their stable local Mn environments remain intact even in the molten state, allowing applications such as luminescence ...
Biswajit Bhattacharyya, Christian Balischewski, Jiyong Kim, Tiago Duarte, Lianshe Fu, Rute A.S. Ferreira, Alkit Beqiraj, Iuliia Mikulska, Diego Gianolio, Eric Sperlich, Felix Stete, Wouter Koopman, Christina Günter, Katlen Brennenstuhl, Daniel Van Opdenbosch, Cordt Zollfrank, Armin Wedel, Beth J. Murray, Małgorzata Swadźba‐Kwaśny, Tillmann Klamroth, Michael U. Kumke, Verónica de Zea Bermudez, Andreas Taubert   +22 more
wiley   +1 more source