Results 21 to 30 of about 6,825 (205)
IEEE Photonics Journal, 2013 We demonstrate an integrated spectrometer-on-a-chip composed of an echelle diffraction grating (EDG) and metal-semiconductor-metal (MSM) waveguide photodetector array based on silicon-on-insulator (SOI).
Xiao Ma, Mingyu Li, Jian-Jun He
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Broadband near-infrared astronomical spectrometer calibration and on-sky validation with an electro-optic laser frequency comb [PDF]
, 2018 The quest for extrasolar planets and their characterisation as well as studies of fundamental physics on cosmological scales rely on capabilities of high-resolution astronomical spectroscopy.
Bouchy, François +12 more
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The promise of recent and future observatories and instruments [PDF]
, 2013 The identification of the carrier(s) of diffuse interstellar bands (DIBs) is one of the oldest mysteries in stellar spectroscopy. With the advent of 8-10m-class telescopes substantial progress has been made in measuring the properties of DIBs in the ...
Kaper, Lex
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Solar Contamination in Extreme-precision Radial-velocity Measurements: Deleterious Effects and Prospects for Mitigation [PDF]
, 2020 Solar contamination, due to moonlight and atmospheric scattering of sunlight, can cause systematic errors in stellar radial velocity (RV) measurements that significantly detract from the ~10 cm s−1 sensitivity required for the detection and ...
Bender, Chad F. +21 more
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Nuclear Materials and Energy, 2023 Plasma-facing materials in tokamak nuclear reactors are subject to intense heat and radiation. The design of liquid metal (LM) divertor walls has several advantages over the solid counterparts.
Sanath J. Shetty +6 more
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Demonstration of a Near-IR Laser Comb for Precision Radial Velocity Measurements in Astronomy [PDF]
, 2015 We describe a successful effort to produce a laser comb around 1.55 $\mu$m in the astronomical H band using a method based on a line-referenced, electro-optical-modulation frequency comb.
C. Beichman +17 more
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AIRES: an airborne infrared echelle spectrometer for SOFIA [PDF]
SPIE Proceedings, 2007 The Stratospheric Observatory for Infrared Astronomy (SOFIA) will enable unique astronomical observations from visible to millimeter wavelengths. AIRES, a long-slit spectrograph with a mid-infrared slit viewing camera, would enable spectral imaging of gas-phase spectral features between 17 and 210 μm with resolving powers from ~60,000 to 5000.
Edwin F. Erickson +5 more
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High-Fidelity Spectroscopy at the Highest Resolutions [PDF]
, 2010 High-fidelity spectroscopy presents challenges for both observations and in designing instruments. High-resolution and high-accuracy spectra are required for verifying hydrodynamic stellar atmospheres and for resolving intergalactic absorption-line ...
Allende Prieto +29 more
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The Lick Observatory Hamilton Echelle Spectrometer [PDF]
Publications of the Astronomical Society of the Pacific, 1987 The Hamilton Echelle Spectrometer, recently installed at the coudé focus of the Shane 3-m telescope, is a high dispersion spectrograph optimized for use with large format CCD's. It was designed primarily for high resolution (R=50,000) wide bandpass spectroscopy of point-like sources down to a limiting magnitude of about V=16.5, over the 0.34 μm to 1.1 ...
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Spectroscopic Studies of Early-type Stars with the Kourovka 1.2-m Telescope
Open Astronomy, 2016 We briey describe the characteristics of the 1.2-m telescope of Kourovka Observatory of the Ural Federal University, equipped with a fiber-optic echelle spectrometer, and report the results of spectroscopic studies of several early-type stars (CC Cas ...
Gorda S. Yu. +4 more
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