Results 41 to 50 of about 534 (173)

Commissioning an Inexpensive Off‐The‐Shelf Spectrograph for Radial‐Velocity Studies

Astronomische Nachrichten, Volume 347, Issue 2, February 2026.
ABSTRACT We present a way to set up an inexpensive out of the shelf spectrograph at a local observatory. Stability and resolution of the spectrograph are high enough for radial velocity determination of binary stars or determination of stellar characteristics. Even some exoplanets might be detectable via the radial velocity method.
Lukas Stock, Andreas Schrimpf
wiley   +1 more source

The planet search program at the ESO Coudé Echelle spectrometer [PDF]

Astronomy & Astrophysics, 2001
In this article we present the results of the planet search program carried out at the ESO Coude Echelle Spectrometer (CES) for components A and B of the α Centauri system. Since November 1992 we have obtained high precision differential radial velocities (RV s) for both stars.
M. Endl, M. Kürster, S. Els, A. P. Hatzes, W. D. Cochran   +4 more
openaire   +1 more source

Differentiation of Ecological Niches in Trophic Specialists From a Disturbed Lacustrine Ecosystem: Insights from the Sympatric Lake Tana Labeobarbs (Cyprinidae)

Ecology and Evolution, Volume 16, Issue 2, February 2026.
Lake Tana harbors the world's most complex adaptive radiation of cyprinids in the world. Although trophic specialization has been proven to drive this diversification, the diet of endemics has been studied using only traditional stomach content analysis.
Evgeny V. Esin, Anastasia D. Kudryavtseva, Boris A. Levin, Belay Abdissa, Benyam Hailu, Fedor N. Shkil, Axel Meyer   +6 more
wiley   +1 more source

Water Vapor Vertical Distribution on Mars After Six Years of TGO/NOMAD Solar Occultations: 1. Global Climatology

Journal of Geophysical Research: Planets, Volume 131, Issue 2, February 2026.
Abstract We present vertical profiles of water vapor obtained during six continuous years of solar occultation observations in the infrared by the Nadir and Occultation for MArs Discovery (NOMAD) instrument on board Trace Gas Orbiter. The retrievals have been performed with an inversion code previously applied to smaller samples of this data set, but ...
A. Brines, M. A. López‐Valverde, B. Funke, F. González‐Galindo, S. Aoki, I. R. Thomas, G. L. Villanueva, G. Liuzzi, J. T. Erwin, U. Grabowski, F. Forget, J. J. Lopez‐Moreno, J. Rodriguez‐Gomez, F. Daerden, L. Trompet, B. Ristic, M. R. Patel, J. A. Holmes, G. Bellucci, A. Modak, A. C. Vandaele   +20 more
wiley   +1 more source

Water Vapor Vertical Distribution on Mars After Six Years of TGO/NOMAD Solar Occultations: 2. Cross‐Validation Within TGO and Comparison With MPCM

Journal of Geophysical Research: Planets, Volume 131, Issue 2, February 2026.
Abstract This is the second part of an investigation of water vapor in the Martian atmosphere using solar occultation observations by the Nadir and Occultation for MArs Discovery (NOMAD) spectrometer on board the ExoMars Trace Gas Orbiter. Following the analysis of six Earth years of NOMAD observations performed in the first part, a cross‐validation ...
A. Brines, M. A. López‐Valverde, F. González‐Galindo, S. Aoki, A. Fedorova, D. Belyaev, F. Forget, E. Vos, F. Montmessin, B. Funke, J. J. Lopez‐Moreno, J. Rodriguez‐Gomez, F. Daerden, I. R. Thomas, L. Trompet, A. Modak, G. L. Villanueva, M. R. Patel, G. Bellucci, A. C. Vandaele   +19 more
wiley   +1 more source

An arbuscular mycorrhiza from the 407‐million‐year‐old Windyfield Chert identified through advanced fluorescence and Raman imaging

New Phytologist, Volume 249, Issue 1, Page 448-459, January 2026.
Summary Mycorrhizal associations between fungi and plants are a fundamental aspect of terrestrial ecosystems. Mycorrhizas occur in c. 85% of extant plants, yet their geological record remains sparse. Rare fossil evidence from early terrestrial environments offers crucial insights into these ancient symbioses, but visualizing fossil fungi at the ...
Christine Strullu‐Derrien, Raymond Wightman, Liam Patrick McDonnell, Gareth Evans, Frédéric A. Fercoq, Paul Kenrick, Andrea C. Ferrari, Sebastian Schornack   +7 more
wiley   +1 more source

Dry Reforming of Methane Over Ceria Supported Catalysts Produced by Direct Impregnation with Leachate Solution from Spent Diesel Auto‐Catalysts

ChemCatChem, Volume 17, Issue 22, November 24, 2025.
The Pt‐containing leachate solution obtained by a hydrometallurgical recovery route of spent diesel oxidation catalysts was successfully used to fabricate Pt/CeO2 catalysts. Dry reforming of methane and reverse water gas shift tests showed good conversion efficiencies, with negligible carbon deposition after ToS experiments of several hours.
Alessio Varotto, Umberto Pasqual Laverdura, Silvano Del Gobbo, Nicola Lisi, Francesco Bozza, Laura Silvestri, Anastasia Maria Moschovi, Iakovos Yakoumis, Zara Cherkezova‐Zheleva, Marta Feroci, Maria Luisa Grilli   +10 more
wiley   +1 more source

Monitoring the lowermost tropospheric ozone with thermal infrared observations from a geostationary platform: performance analyses for a future dedicated instrument [PDF]

Atmospheric Measurement Techniques, 2014
In this paper, we present performance analyses for a concept geostationary observing system called MAGEAQ (Monitoring the Atmosphere from Geostationary orbit for European Air Quality).
P. Sellitto, G. Dufour, M. Eremenko, J. Cuesta, G. Forêt, B. Gaubert, M. Beekmann, V.-H. Peuch, J.-M. Flaud   +8 more
doaj   +1 more source

Elemental Analysis of Catalysts in a Fixed‐Bed Reactor by Laser‐Induced Breakdown Spectroscopy

ChemCatChem, Volume 17, Issue 21, November 10, 2025.
The “Elemental Composition” provides information about promoters and poisons found in heterogeneous catalysts. Access to this piece of information under reaction conditions remains yet an unsolved challenge. This work explores the potential and limitations of laser‐induced breakdown spectroscopy (LIBS) as an in situ reactor diagnostic technique ...
Diego Espinoza, Hemanth Appala, Oliver Korup, Raimund Horn   +3 more
wiley   +1 more source

Development of a spatial heterodyne Raman spectrometer with echelle-mirror structure

Optics Express, 2018
Spatial heterodyne Raman spectroscopy is a spectroscopic detection technique that is particularly suitable for Raman measurements. The spectral range of traditional spatial heterodyne Raman spectrometer (SHRS) is limited by its spectral resolution and the number of detector elements.
Jun Qiu, Xiangdong Qi, Xiaotian Li, Zhenyu Ma, null Jirigalantu, Yuguo Tang, Xiaotao Mi, Xiaoming Zheng, Rui Zhang, null Bayanheshig   +9 more
openaire   +2 more sources