Results 71 to 80 of about 74,003 (312)
ZAP -- Enhanced PCA Sky Subtraction for Integral Field Spectroscopy
, 2016 We introduce Zurich Atmosphere Purge (ZAP), an approach to sky subtraction based on principal component analysis (PCA) that we have developed for the Multi Unit Spectrographic Explorer (MUSE) integral field spectrograph.
Bacon, Roland +4 more
core +3 more sources
Survival of Massive Star-forming Galaxies in Cluster Cores Drives Gas-Phase Metallicity Gradients : The Effects of Ram Pressure Stripping [PDF]
, 2017 Recent observations of galaxies in a cluster at z=0.35 show that their integrated gas-phase metallicities increase with decreasing cluster-centric distance.
Gupta, Anshu +4 more
core +3 more sources
Why Machine Learning Models Systematically Underestimate Extreme Values
The Open Journal of AstrophysicsA persistent challenge in astronomical machine learning is a systematic bias where predictions compress the dynamic range of true values---high values are consistently predicted too low while low values are predicted too high. Understanding this bias has
Yuan-Sen Ting
doaj +1 more source
Spectrally Tunable 2D Material‐Based Infrared Photodetectors for Intelligent Optoelectronics
Advanced Functional Materials, EarlyView.Intelligent optoelectronics through spectral engineering of 2D material‐based infrared photodetectors. Abstract The evolution of intelligent optoelectronic systems is driven by artificial intelligence (AI). However, their practical realization hinges on the ability to dynamically capture and process optical signals across a broad infrared (IR) spectrum.
Junheon Ha +18 more
wiley +1 more source
The Astrophysical Journal LettersThe recent discovery of “ultrahot” ( P < 1 day) Neptunes has come as a surprise: some of these planets have managed to retain gaseous envelopes despite being close enough to their host stars to trigger strong photoevaporation and/or Roche lobe overflow ...
Shreyas Vissapragada +18 more
doaj +1 more source
ASTRONOMICAL GLASS PLATE NEGATIVES: MONITORING OF EMULSION LAYER DETERIORATION
Acta Polytechnica, 2016 One of the techniques for making photographic negatives most used in the history of photography were gelatin glass plates. This technique was used not only in the artistic field but also and mainly in the scientific field.
L. Miskova +3 more
doaj +1 more source
Advanced Functional Materials, EarlyView.It is shown that interfaces between organic and inorganic layers govern long‐range stacking disorder and in‐plane anisotropy in 2D metal‐halide perovskites. By comparing single‐cation AB‐AB and ordered mixed‐cation ABCD‐ABCD stackings, SCXRD reveals enhanced mosaicity, while optics confirm high birefringence.
Yixuan Dou +6 more
wiley +1 more source
Infrared spectroscopy of circumstellar dust: signs of differentiated materials? [PDF]
, 2006 Mid-infrared absorption spectra of powdered achondrites are compared with the astronomical spectra of dust around young, evolving stars, to find evidence (or not) of dust formed in collisional cascades of material from ...
Grady, M. M., Köhler, M., Morlok, A.
core
The growth of interest for astronomical X-ray polarimetry
, 2018 Astronomical X-ray polarimetry was first explored in the end of the 60's by pioneering rocket instruments. The craze arising from the first discoveries on stellar and supernova remnant X-ray polarization led to the addition of X-ray polarimeters on-board
Marin, F.
core +1 more source
Overview of the Fiber System for the Dark Energy Spectroscopic Instrument
The Astronomical JournalThe Dark Energy Spectroscopic Instrument (DESI) is a revolutionary instrument designed for precise measurements of cosmic distances and the investigation of dark energy.
Claire Poppett +68 more
doaj +1 more source