Results 61 to 70 of about 1,574,076 (309)

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

RVSNUpy: A Python Package for Spectroscopic Redshift Measurement Based on Cross Correlation

The Astronomical Journal
We introduce RVSNUpy , a new Python package designed to measure spectroscopic redshifts. Based on inverse-variance-weighted cross correlation, RVSNUpy determines redshifts by comparing observed spectra with various rest-frame template spectra.
Taewan Kim, Jubee Sohn, Ho Seong Hwang
doaj   +1 more source

Experimental Phase Function and Degree of Linear Polarization of Light Scattered by Hydrogenated Amorphous Carbon Circumstellar Dust Analogs

The Astrophysical Journal Supplement Series, 2023
Astronomical observations of the polarized intensity of scattered visible light have revealed the presence of dust envelopes around different types of evolved stars.
Juan Carlos Gómez Martín, Olga Muñoz, Julia Martikainen, Daniel Guirado, Isabel Tanarro, Ramón J. Peláez, Belén Maté, Miguel Jiménez-Redondo, Víctor J. Herrero, Marco Peiteado, Teresa Jardiel   +10 more
doaj   +1 more source

Advances in optical engineering for future telescopes

Opto-Electronic Advances, 2021
Significant optical engineering advances at the University of Arizona are being made for design, fabrication, and construction of next generation astronomical telescopes. This summary review paper focuses on the technological advances in three key areas.
Daewook Kim, Heejoo Choi, Trenton Brendel, Henry Quach, Marcos Esparza, Hyukmo Kang, Yi-Ting Feng, Jaren N. Ashcraft, Xiaolong Ke, Tianyi Wang, Ewan S. Douglas   +10 more
doaj   +1 more source

Nitrogen‐Vacancy Magnetometry of Edge Magnetism in WS2 Flakes

Advanced Functional Materials, EarlyView.
Using nitrogen‐vacancy magnetometry, the authors visualize room‐temperature stray magnetic fields localized at the edges of WS2 flakes. Their measurements reveal edge‐specific magnetization consistent with spin canting in antiferromagnetically coupled edge states.
Ilja Fescenko, Raman Kumar, Thitinun Gas‐Osoth, Yifei Wang, Suvechhya Lamichhane, Tianlin Li, Adam Erickson, Nina Raghavan, Tom Delord, Cory D. Cress, Nicholas Proscia, Samuel W. LaGasse, Sy‐Hwang Liou, Xia Hong, Jose J. Fonesca, Toshu An, Carlos A. Meriles, Abdelghani Laraoui   +17 more
wiley   +1 more source

Ultra Low Dispersion Spectroscopy with Gaia and Astronomical Slitless Surveys

Acta Polytechnica, 2012
The ultra-low dispersion spectroscopy to be applied in the ESA Gaia space observatory and the ground-based objective-prism plate surveys represent a similar type of astrophysical data.
R. Hudec, L. Hudec, M. Klíma
doaj  

Simulating Continuum-based Redshift Measurement in the Roman’s High Latitude Spectroscopic Survey

The Astronomical Journal
We investigate the capability of the Nancy Grace Roman Space Telescope’s (Roman) Wide-Field Instrument G150 slitless grism to detect red, quiescent galaxies based on the current reference survey.
Zhiyuan Guo, Bhavin Joshi, C. W. Walter, M. A. Troxel   +3 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, P. Novák, R. Hudec, M. Novotná   +3 more
doaj   +1 more source

Spectral Deconvolution With Deep Learning: Removing the Effects of Spectral PSF Broadening

Frontiers in Astronomy and Space Sciences, 2020
We explore novel methods of recovering the original spectral line profiles from data obtained by instruments that sample those profiles with an extended or multipeaked spectral transmission profile.
Momchil Molnar, Momchil Molnar, Kevin P. Reardon, Kevin P. Reardon, Christopher Osborne, Ivan Milić, Ivan Milić   +6 more
doaj   +1 more source

LOTUS: A (Non-) LTE Optimization Tool for Uniform Derivation of Stellar Atmospheric Parameters

The Astronomical Journal, 2023
Precise fundamental atmospheric stellar parameters and abundance determination of individual elements in stars are important for all stellar population studies.
Yangyang Li, Rana Ezzeddine
doaj   +1 more source