Results 11 to 20 of about 74,003 (312)
A near-infrared frequency comb for Y+J band astronomical spectroscopy [PDF]
, 2012 Radial velocity (RV) surveys supported by high precision wavelength references (notably ThAr lamps and I2 cells) have successfully identified hundreds of exoplanets; however, as the search for exoplanets moves to cooler, lower mass stars, the optimum ...
Steve Osterman +10 more
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High-Precision Single-Photon Laser Time Transfer with Temperature Drift Post-Compensation
Sensors, 2020 Laser time transfer is of great significance in timing and global time synchronization. However, the temperature drift may occur and affect the delay of the electronics system, optic generation and detection system.
Wendong Meng +7 more
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Determining Redshift via Astronomical Spectroscopy
, 2018 The Doppler effect is a well-known physical phenomenon which results in a change of a wave’s frequency or wavelength due to the motion of its source. Celestial objects in space (stars, galaxies, etc.) also experience a Doppler effect on their emitted electromagnetic radiation called redshift. In this study, redshifts were observed in the spectrographic
Joshua Glatt
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Shock Excitation in Narrow-line Regions Powered by AGN Outflows
The Astrophysical Journal, 2023 Outflows in an active galactic nucleus (AGN) are considered to play a key role in the evolution of the host galaxy through transfer of a large amount of energy.
Misaki Mizumoto +12 more
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A Beginner’s Guide to Working with Astronomical Data
The Open Journal of Astrophysics, 2020 This elementary review covers the basics of working with astronomical data, notably with images, spectra and higher-level (catalog) data. The basic concepts and tools are presented using both application software (DS9 and TOPCAT) and Python. The level of
Markus Pössel
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An aperture of 21 cm telescope with polarized coaxial for satellite laser ranging
Frontiers in Physics, 2023 With the development of aerospace and space scientific research, satellite laser ranging (SLR) has put forward higher requirements for response speed, data density, and measurement accuracy. In coaxial common optical path laser ranging, the emitted laser
Mingliang Long +10 more
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Astronomical Applications of Multi-Core Fiber Technology [PDF]
, 2020 Optical fibers have altered astronomical instrument design by allowing for a complex, often large instrument to be mounted in a remote and stable location with respect to the telescope.
Cvetojevic, Nick +2 more
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Open questions on carbon-based molecules in space
Communications Chemistry, 2022 It has been a great joint achievement of astronomy, laboratory spectroscopy and quantum chemistry to identify interstellar molecules in various astronomical environments and piece together their origins story from the fragmented evidence.
Christopher S. Hansen +3 more
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Satellite laser ranging at ultra-high PRF of hundreds of kilohertz all day
Frontiers in Physics, 2022 Satellite laser ranging (SLR) had been operated at a pulse repetition frequency (PRF) from ∼10 Hz to 10 kHz; the ultra-high PRF of SLR (UH-SLR) is a trend of development.
Mingliang Long +9 more
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Metallicities of Classical Cepheids in the Inner Galactic Disk
The Astrophysical Journal, 2023 Metallicity gradients refer to the sloped radial profiles of the metallicities of gas and stars and are commonly seen in disk galaxies. A well-defined metallicity gradient of the Galactic disk is observed particularly well with classical Cepheids, which ...
Noriyuki Matsunaga +16 more
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