Results 31 to 40 of about 1,141 (166)
Overview of the Instrumentation for the Dark Energy Spectroscopic Instrument
The Astronomical Journal, 2022 The Dark Energy Spectroscopic Instrument (DESI) embarked on an ambitious 5 yr survey in 2021 May to explore the nature of dark energy with spectroscopic measurements of 40 million galaxies and quasars. DESI will determine precise redshifts and employ the
DESI Collaboration +269 more
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Open Astronomy, 2021 We present intensity curves of solar flares obtained in the Hα hydrogen line and CaII H, CaIR 8542Å lines using multichannel spectrographs of Ondřejov Observatory (Czech Republic) for the period 2000–2012.
Kupryakov Yurij Alekseevich +5 more
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STRONTIUM ABUNDANCES IN COOL DWARF STARS OF GALACTIC THIN AND THICK DISKS
Odessa Astronomical Publications, 2016 We revise the strontium abundances in FGK stars with metallicities ranging from −1.0 < [Fe/H] < +0.3. The observed stars belong to the substructures of the Galaxy thick and thin discs.
T. I. Gorbaneva, T. V. Mishenina
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The SDSS-V Local Volume Mapper Telescope System
The Astronomical JournalThis paper presents the Local Volume Mapper (LVM) telescope system. LVM is one of three surveys that form the fifth generation of the Sloan Digital Sky Survey (SDSS-V), and it employs a coordinated network of four, 16 cm diameter telescopes feeding ...
T. M. Herbst +28 more
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Alpha-Particle Spectrograph [PDF]
Review of Scientific Instruments, 1951 An alpha-particle spectrometer, using a 60° sector magnet capable of focusing alpha-particles of energies up to 14 Mev, is described. Description of the instrument, sample technique, focusing properties, and current supplies are discussed. Transmission is about 0.01 percent of the total solid angle of the sample and with a resolution of 8 kev.
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MOLYBDENUM AND RUTHENIUM ABUNDANCES IN COOL STARS OF THE GALACTIC DISC
Odessa Astronomical Publications, 2017 We revise the molybdenum and ruthenium abundances in FGK stars with metallicities ranging from −1.0 < [Fe/H] < +0.3. The observed stars belong to the substructures of the Galaxy. The observations were conducted using the 1.93 m telescope at
T. I. Gorbaneva, T. V. Mishenina
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, 2014 Citation: 'spectrograph' in the IUPAC Compendium of Chemical Terminology, 3rd ed.; International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. 10.1351/goldbook.S05836 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms.
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Spectroscopy of Planetary Nebulae with Herschel: A Beginners Guide
Galaxies, 2018 A brief overview of the Herschel Space Telescope PACS and SPIRE spectrographs is given, pointing out aspects of working with the data products that should be considered by anyone using them.
Katrina Exter
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Replicated spectrographs in astronomy [PDF]
Advanced Optical Technologies, 2014 Abstract As telescope apertures increase, the challenge of scaling spectrographic astronomical instruments becomes acute. The next generation of extremely large telescopes (ELTs) strain the availability of glass blanks for optics and engineering to provide sufficient mechanical stability. While breaking the relationship between telescope
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Low-amplitude Solar-like Oscillations in the K5 V Star ϵ Indi A
The Astrophysical JournalWe have detected solar-like oscillations in the mid-K-dwarf ϵ Indi A, making it the coolest dwarf to have measured oscillations. The star is noteworthy for harboring a pair of brown dwarf companions and a Jupiter-type planet.
Mia S. Lundkvist +19 more
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