Results 41 to 50 of about 7,202 (193)

CHIRON - A Fiber Fed Spectrometer for Precise Radial Velocities

, 2013
The CHIRON optical high-resolution echelle spectrometer was commissioned at the 1.5m telescope at CTIO in 2011. The instrument was designed for high throughput and stability, with the goal of monitoring radial velocities of bright stars with high ...
Bonati, Marco, Fischer, Debra A., Giguere, Matthew J., Moore, Peter, Schwab, Christian, Spronck, Julien F. P., Szymkowiak, Andrew, Tokovinin, Andrei   +7 more
core   +1 more source

EXOhSPEC folded design optimization and performance estimation [PDF]

, 2019
The EXOplanet high resolution SPECtrograph (EXOhSPEC) instrument is an echelle spectrograph dedicated to the detection of exoplanets by using the radial velocity method using 2m class telescopes.
Buisset, Christophe, Errmann, Ronny, Jones, Hugh, Lhospice, Esther, Martin, Bill   +4 more
core   +2 more sources

Reinventing henna: Enzyme‐catalysed colour release from stabilized Lawsonia inermis L. extracts

International Journal of Cosmetic Science, EarlyView.
The instability and reduced dyeing performance of a cosmetic formulation containing 2‐hydroxy‐1,4‐naphthoquinone (lawsone), derived from Lawsonia inermis L., is demonstrated in comparison to a novel two‐component system. This system comprises one formulation with naturally occurring lawsone precursors and a second containing a specific hydrolase ...
Nele Dallmann, Volkmar Vill, Fabian Straske   +2 more
wiley   +1 more source

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

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

The Kepler Giant Planet Search. I. A Decade of Kepler Planet-host Radial Velocities from W. M. Keck Observatory

The Astrophysical Journal Supplement Series, 2023
Despite the importance of Jupiter and Saturn to Earth’s formation and habitability, there has not yet been a comprehensive observational study of how giant exoplanets correlate with the architectural properties of close-in, sub-Neptune-sized exoplanets ...
Lauren M. Weiss, Howard Isaacson, Andrew W. Howard, Benjamin J. Fulton, Erik A. Petigura, Daniel Fabrycky, Daniel Jontof-Hutter, Jason H. Steffen, Hilke E. Schlichting, Jason T. Wright, Corey Beard, Casey L. Brinkman, Ashley Chontos, Steven Giacalone, Michelle L. Hill, Molly R. Kosiarek, Mason G. MacDougall, Teo Močnik, Alex S. Polanski, Emma V. Turtelboom, Dakotah Tyler, Judah Van Zandt   +21 more
doaj   +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

THE OPTICAL HIGH-RESOLUTION SPECTROSCOPY AS A METHOD OF X-RAY BINARY CYG X-1 INVESTIGATION

Odessa Astronomical Publications, 2017
Recently a lot of photometric effects were revealed during the investigation of the first can- didate to black hole Cyg X-1. Besides of orbital vari- ations different kinds of flares, so-called precession period 147/294 days and a significant correlation
E. A. Karitskaya, A. V. Bondar, N. G. Bochkarev, G. A. Galazutdinov, F. A. Musaev, A. A. Sapar   +5 more
doaj   +1 more source

A comprehensive radial velocity error budget for next generation Doppler spectrometers

, 2016
We describe a detailed radial velocity error budget for the NASA-NSF Extreme Precision Doppler Spectrometer instrument concept NEID (NN-explore Exoplanet Investigations with Doppler spectroscopy).
Bender, Chad, Blake, Cullen, Gong, Qian, Halverson, Samuel, Hearty, Fred, Levi, Eric, Mahadevan, Suvrath, McElwain, Michael, Monson, Andrew, Ramsey, Lawrence, Robertson, Paul, Roy, Arpita, Schwab, Christian, Stefánsson, Guðmundur Kári, Terrien, Ryan, Wang, Sharon, Wright, Jason   +16 more
core   +1 more source