Results 11 to 20 of about 1,548 (142)

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, Els Peeters, Jan Cami, Timothy W. Schmidt   +3 more
doaj   +1 more source

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, Haifeng Zhang, Haifeng Zhang, Rong Zong Yu, Zhibo Wu, Zhibo Wu, Si Qin, Zhongping Zhang, Zhongping Zhang, Zhongping Zhang   +9 more
doaj   +1 more source

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, Daisuke Taniguchi, Scarlet S. Elgueta, Takuji Tsujimoto, Junichi Baba, Andrew McWilliam, Shogo Otsubo, Yuki Sarugaku, Tomomi Takeuchi, Haruki Katoh, Satoshi Hamano, Yuji Ikeda, Hideyo Kawakita, Charlie Hull, Rogelio Albarracín, Giuseppe Bono, Valentina D’Orazi   +16 more
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EXPLANATION: Exoplanet and Transient Event Investigation Project—Optical Facilities and Solutions

Photonics, 2022
Over the past decades, the achievements in astronomical instrumentation have given rise to a number of novel advanced studies related to the analysis of large arrays of observational data.
Gennady Valyavin, Grigory Beskin, Azamat Valeev, Gazinur Galazutdinov, Sergei Fabrika, Iosif Romanyuk, Vitaly Aitov, Oleg Yakovlev, Anastasia Ivanova, Roman Baluev, Valery Vlasyuk, Inwoo Han, Sergei Karpov, Vyacheslav Sasyuk, Alexei Perkov, Sergei Bondar, Faig Musaev, Eduard Emelianov, Timur Fatkhullin, Sergei Drabek, Vladimir Shergin, Byeong-Cheol Lee, Guram Mitiani, Tatiana Burlakova, Maksim Yushkin, Eugene Sendzikas, Damir Gadelshin, Lisa Chmyreva, Anatoly Beskakotov, Vladimir Dyachenko, Denis Rastegaev, Arina Mitrofanova, Ilia Yakunin, Kirill Antonyuk, Vladimir Plokhotnichenko, Alexei Gutaev, Nadezhda Lyapsina, Vladimir Chernenkov, Anton Biryukov, Evgenij Ivanov, Elena Katkova, Alexander Belinski, Eugene Sokov, Alexander Tavrov, Oleg Korablev, Myeong-Gu Park, Vladislav Stolyarov, Victor Bychkov, Stanislav Gorda, A. A. Popov, A. M. Sobolev   +50 more
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Astrophotonic Spectrographs

Applied Sciences, 2019
Astrophotonics is the application of photonic technologies to channel, manipulate, and disperse light from one or more telescopes to achieve scientific objectives in astronomy in an efficient and cost-effective way.
Pradip Gatkine, Sylvain Veilleux, Mario Dagenais   +2 more
doaj   +1 more source

The Robotic Multiobject Focal Plane System of the Dark Energy Spectroscopic Instrument (DESI)

The Astronomical Journal, 2022
A system of 5020 robotic fiber positioners was installed in 2019 on the Mayall Telescope, at Kitt Peak National Observatory. The robots automatically retarget their optical fibers every 10–20 minutes, each to a precision of several microns, with a ...
Joseph Harry Silber, Parker Fagrelius, Kevin Fanning, Michael Schubnell, Jessica Nicole Aguilar, Steven Ahlen, Jon Ameel, Otger Ballester, Charles Baltay, Chris Bebek, Dominic Benton Beard, Robert Besuner, Laia Cardiel-Sas, Ricard Casas, Francisco Javier Castander, Todd Claybaugh, Carl Dobson, Yutong Duan, Patrick Dunlop, Jerry Edelstein, William T. Emmet, Ann Elliott, Matthew Evatt, Irena Gershkovich, Julien Guy, Stu Harris, Henry Heetderks, Ian Heetderks, Klaus Honscheid, Jose Maria Illa, Patrick Jelinsky, Sharon R. Jelinsky, Jorge Jimenez, Armin Karcher, Stephen Kent, David Kirkby, Jean-Paul Kneib, Andrew Lambert, Mike Lampton, Daniela Leitner, Michael Levi, Jeremy McCauley, Aaron Meisner, Timothy N. Miller, Ramon Miquel, Juliá Mundet, Claire Poppett, David Rabinowitz, Kevin Reil, David Roman, David Schlegel, Santiago Serrano, William Van Shourt, David Sprayberry, Gregory Tarlé, Suk Sien Tie, Curtis Weaverdyck, Kai Zhang, Marco Azzaro, Stephen Bailey, Santiago Becerril, Tami Blackwell, Mohamed Bouri, David Brooks, Elizabeth Buckley-Geer, Jose Peñate Castro, Mark Derwent, Arjun Dey, Govinda Dhungana, Peter Doel, Daniel J. Eisenstein, Nasib Fahim, Juan Garcia-Bellido, Enrique Gaztañaga, Satya Gontcho A Gontcho, Gaston Gutierrez, Philipp Hörler, Robert Kehoe, Theodore Kisner, Anthony Kremin, Luzius Kronig, Martin Landriau, Laurent Le Guillou, Paul Martini, John Moustakas, Nathalie Palanque-Delabrouille, Xiyan Peng, Will Percival, Francisco Prada, Carlos Allende Prieto, Guillermo Gonzalez de Rivera, Eusebio Sanchez, Justo Sanchez, Ray Sharples, Marcelle Soares-Santos, Edward Schlafly, Benjamin Alan Weaver, Zhimin Zhou, Yaling Zhu, Hu Zou, (DESI Collaboration)   +100 more
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X-RAY ASTRONOMICAL SPECTROSCOPY [PDF]

Exploring the Universe, 1980
The current status of the X-ray spectroscopy of celestial X-ray sources, ranging from nearby stars to distant quasars, is reviewed. Particular emphasis is placed on the role of such spectroscopy as a useful and unique tool in the elucidation of the physical parameters of the sources.
openaire   +1 more source

Kinematical and dynamical properties of recently discovered bulge and disc star clusters with WINERED

Astronomy & Astrophysics
Context. Galactic globular clusters are a very important tool in explaining the characteristics of the Milky Way. Therefore it is essential to determine the kinematical and dynamical properties of the new star cluster candidates, especially at the low ...
Petralia Ilaria, Minniti Dante, Fernández-Trincado José G., Matsunaga Noriyuki, Taniguchi Daisuke, Saroon Sasi, Garro Elisa R., Sameshima Hiroaki, Otsubo Shogo, Sarugaku Yuki, Takeuchi Tomomi   +10 more
doaj   +1 more source

CUBESPEC: low-cost space-based astronomical spectroscopy [PDF]

Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave, 2018
CubeSats are routinely used for low-cost photometry from space. Space-borne spectroscopy, however, is still the exclusive domain of much larger platforms. Key astrophysical questions in e.g. stellar physics and exoplanet research require uninterrupted spectral monitoring from space over weeks or months.
Raskin, G., Delabie, T., De Munter, W., Sana, H., Vandenbussche, B., Vandoren, B., Antoci, V., Kjeldsen, H., Karoff, C., de Koter, A., Désert, J.-M., Mladenov, T., Vandepitte, D.   +12 more
openaire   +3 more sources

Constrained deconvolution by explicit correction of fourier components of the unknown distribution [PDF]

Serbian Astronomical Journal, 1999
The physical constraints were applied in the problem of deconvolution by explicitly correcting noise affected Fourier components of the unknown distribution. The method gives the constrained estimate optimal in the quadratic sense, i.e.
Jankov S.
doaj   +1 more source