The astronomical significance of the clockwise misalignment from cardinal directions in the Maya lowlands [PDF]
Archaeoastronomy and Ancient Technologies, 2014 In this paper we outline the results of our archaeoastronomical study dealing with a number of Mayan settlements located in the lowlands of Campeche, Yucatan and Quintana Roo (Mexico), in order to try to explain the well- known clockwise misalignments ...
Motta, S., Gaspani, A.
doaj +1 more source
Large Anomalous and Topological Hall Effect and Nernst Effect in a Dirac Kagome Magnet Fe3Ge
Advanced Functional Materials, EarlyView.Fe3Ge, a Kagome‐lattice magnet, exhibits remarkable anomalous Hall and Nernst effects, with transverse thermoelectric conductivity surpassing or comaprable to some well‐known ferromagnets. First‐principles calculations attribute these to Berry curvature from massive Dirac gaps. Additionally, topological Hall and Nernst signals emerge from field‐induced
Chunqiang Xu +11 more
wiley +1 more source
Point Spread Functions in Identification of Astronomical Objects from Poisson Noised Image [PDF]
Radioengineering, 2016 This article deals with modeling of astronomical objects, which is one of the most fundamental topics in astronomical science. Introduction part is focused on problem description and used methods.
F. Mojzis, J. Kukal, J. Svihlik
doaj
Relativistic Astronomy. III. Test of Special Relativity via Doppler Effect
, 2019 The Breakthrough Starshot program is planning to send transrelativistic probes to travel to nearby stellar systems within decades. Because the probe velocity is designed to be a good fraction of the light speed, Zhang & Li recently proposed that these ...
Yang, Yuan-Pei +2 more
core +2 more sources
Cleaning sky survey databases using Hough Transform and Renewal String approaches [PDF]
, 2003 Large astronomical databases obtained from sky surveys such as the SuperCOSMOS Sky Survey (SSS) invariably suffer from spurious records coming from artefactual effects of the telescope, satellites and junk objects in orbit around earth and physical ...
A. J. Storkey +24 more
core +2 more sources
Defects Dynamic in Photo‐Excited CeO2 and their Influence on CO2 Photoreduction
Advanced Functional Materials, EarlyView.X‐ray photoelectron spectroscopy study under light excitation is presented to track the defect dynamic (Ce4+ to Ce3+) in CeO2. Surface enhanced Raman spectroscopy confirmed the key role of Ce3+ states in controlling charge and energy transfer across the CeO2‐dye molecule interface.
Rambabu Yalavarthi +3 more
wiley +1 more source
Automated Scheduling of Doppler Exoplanet Observations at Keck Observatory
The Astronomical JournalPrecise Doppler studies of extrasolar planets require fine-grained control of observational cadence, i.e., the timing of and spacing between observations.
Luke B. Handley +4 more
doaj +1 more source
In-flight calibration of the Herschel-SPIRE instrument [PDF]
, 2010 SPIRE, the Spectral and Photometric Imaging REceiver, is the Herschel Space Observatory's submillimetre camera and spectrometer. It contains a three-band imaging photometer operating at 250, 350 and 500 μm, and an imaging Fourier-transform spectrometer (
Levenson, L. +7 more
core
Automated data reduction workflows for astronomy
, 2013 Data from complex modern astronomical instruments often consist of a large number of different science and calibration files, and their reduction requires a variety of software tools.
Ballester, P. +7 more
core +1 more source
Photonic Engineering Enables All‐Passive Upconversion Imaging with Low‐Intensity Near‐Infrared Light
Advanced Functional Materials, EarlyView.A passive upconversion imaging system enables the observation of scenes illuminated by low‐intensity incoherent near‐infrared light from 750 to 930 nm, by converting it into the visible without the use of external power. The upconverter is enabled by triplet–triplet annihilation in a bulk heterojunction, with absorption enhanced by plasmonic resonators
Rabeeya Hamid +13 more
wiley +1 more source