Results 1 to 10 of about 1,548 (142)

Random Access Addressing of MEMS Electrostatic Shutter Array for Multi-Object Astronomical Spectroscopy [PDF]

Micromachines, 2020
An extended version of cross-bar type addressing technique is developed for three-port electrostatic micro shutters arranged in an arrayed format. A microelectromechanical systems (MEMS) shutter blade suspended by a pair of torsion beams works as a ...
Xufeng Liu, Takuya Takahashi, Masahiro Konishi, Kentaro Motohara, Hiroshi Toshiyoshi   +4 more
doaj   +2 more sources

Laboratory detection and rotational spectroscopy of trans-HNSO: implications for astronomical observations [PDF]

Frontiers in Chemistry
Sulfur-bearing molecules are central to interstellar chemistry, yet their observed abundances in the gas phase remain far below cosmic expectations in dense interstellar regions.
Valerio Lattanzi, Miguel Sanz-Novo, Víctor M. Rivilla, Izaskun Jiménez-Serra, Paola Caselli   +4 more
doaj   +2 more sources

Ultraviolet astronomical spectrograph calibration with laser frequency combs from nanophotonic lithium niobate waveguides [PDF]

Nature Communications
Astronomical precision spectroscopy underpins searches for life beyond Earth, direct observation of the expanding Universe and constraining the potential variability of physical constants on cosmological scales.
Markus Ludwig, Furkan Ayhan, Tobias M. Schmidt, Thibault Wildi, Thibault Voumard, Roman Blum, Zhichao Ye, Fuchuan Lei, François Wildi, Francesco Pepe, Mahmoud A. Gaafar, Ewelina Obrzud, Davide Grassani, Olivia Hefti, Sylvain Karlen, Steve Lecomte, François Moreau, Bruno Chazelas, Rico Sottile, Victor Torres-Company, Victor Brasch, Luis G. Villanueva, François Bouchy, Tobias Herr   +23 more
doaj   +2 more sources

Comprehensive Analysis of a Symbiotic Candidate V503 Her

The Astronomical Journal, 2023
V503 Her was previously proposed as an eclipsing symbiotic candidate based on photometric behavior and spectroscopic appearance indicating the composite optical spectrum.
Jaroslav Merc, Rudolf Gális, Marek Wolf, Pavol A. Dubovský, Jan Kára, Forrest Sims, James R. Foster, Tomáš Medulka, Christophe Boussin, John P. Coffin, Christian Buil, David Boyd, Jacques Montier   +12 more
doaj   +1 more source

Dispersion Characteristics of the Multi-mode Fiber-fed VIPA Spectrograph

The Astronomical Journal, 2023
A high-resolution ( ${ \mathcal R }\gt {10}^{5}$ ), multi-mode fiber-fed spectrograph on large telescopes with a reasonable size is desirable in astronomy.
Xiaoming Zhu, Dong Lin, Zhongnan Zhang, Xintong Xie, Jinping He   +4 more
doaj   +1 more source

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, Yurong Wang, Kai Tang, Zhijie Zhang, Shuanggen Jin, Ivan Procházka, Zhongping Zhang, Guang Wu   +7 more
doaj   +1 more source

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
doaj   +1 more source

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, Hiroaki Sameshima, Naoto Kobayashi, Noriyuki Matsunaga, Sohei Kondo, Satoshi Hamano, Chikako Yasui, Kei Fukue, Akira Arai, Hideyo Kawakita, Shogo Otsubo, Giuseppe Bono, Ivo Saviane   +12 more
doaj   +1 more source

Astronomical Spectroscopy [PDF]

, 2013
Spectroscopy is one of the most important tools that an astronomer has for studying the universe. This chapter begins by discussing the basics, including the different types of optical spectrographs, with extension to the ultraviolet and the near-infrared.
Massey, Philip, Hanson, Margaret M.
openaire   +2 more sources

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, Huarong Deng, Haifeng Zhang, Haifeng Zhang, Kai Tan, Hai sheng Lin, Zhibo Wu, Zhibo Wu, Zhongping Zhang, Zhongping Zhang, Zhongping Zhang   +10 more
doaj   +1 more source