Results 51 to 60 of about 1,141 (166)

Stark Broadening of Se IV, Sn IV, Sb IV and Te IV Spectral Lines

open access: yesAtoms, 2018
Stark broadening parameters, line width and shift, are needed for investigations, analysis and modelling of astrophysical, laboratory, laser produced and technological plasmas.
Milan S. Dimitrijević   +5 more
doaj   +1 more source

A near infrared laser frequency comb for high precision Doppler planet surveys

open access: yesEPJ Web of Conferences, 2011
Perhaps the most exciting area of astronomical research today is the study of exoplanets and exoplanetary systems, engaging the imagination not just of the astronomical community, but of the general population. Astronomical instrumentation has matured to
Bally J.   +5 more
doaj   +1 more source

GRASS. II. Simulations of Potential Granulation Noise Mitigation Methods

open access: yesThe Astronomical Journal
We present an updated version of the GRanulation And Spectrum Simulator (GRASS) which now uses an expanded library of 22 solar lines to empirically model time-resolved spectral variations arising from solar granulation.
Michael L. Palumbo III   +5 more
doaj   +1 more source

The Mitchell Spectrograph: Studying Nearby Galaxies with the VIRUS Prototype

open access: yesAdvances in Astronomy, 2013
The Mitchell Spectrograph (a.k.a. VIRUS-P) on the 2.7 m Harlan J. Smith telescope at McDonald Observatory is currently the largest field of view (FOV) integral field unit (IFU) spectrograph in the world (1.7′×1.7′). It was designed as a prototype for the
Guillermo A. Blanc
doaj   +1 more source

Spectrographs Speech Measures and Audiologic Findings of Young Children with Unilateral Cleft Lip and Palate

open access: yesTurkish Journal of Orthodontics, 2008
The aim of the study was to assess the audiologic and the speech status of operated unilateral cleft preschooler patients who have no orthodontic, otologic, and speech therapy.
Fatih Ögüt   +4 more
doaj   +1 more source

Hamilton’s Object revisited: A challenging source redshift of a strong lensing configuration

open access: yesAstronomy & Astrophysics
Low-resolution spectrographs used to have difficulties in determining redshifts of galaxies at z ≈ 1 and z ≈ 3. Spectral emission and absorption lines of magnesium and iron redshifted to z ≈ 1 fall close to hydrogen, silicon, and oxygen lines at z ≈ 3 ...
Wagner Jenny, Falco Emilio E.
doaj   +1 more source

Spectral Imager of the Solar Atmosphere: The First Extreme-Ultraviolet Solar Integral Field Spectrograph Using Slicers

open access: yesAerospace
Particle acceleration, and the thermalisation of energetic particles, are fundamental processes across the universe. Whilst the Sun is an excellent object to study this phenomenon, since it is the most energetic particle accelerator in the Solar System ...
Ariadna Calcines Rosario   +14 more
doaj   +1 more source

Transiting Sub-stellar companions of Intermediate-mass stars

open access: yesEPJ Web of Conferences, 2015
We use the CoRoT-survey to search for transiting close-in planets of intermediate-mass stars (M* = 1.3 − 2.1 M⊙). We present recent results of our survey.
Sebastian Daniel   +4 more
doaj   +1 more source

Design and Commissioning of an Iodine Cell for the ESPRESSO Spectrograph

open access: yesThe Astronomical Journal
High-resolution echelle spectrographs remain the backbone of precision Doppler radial velocity (RV) programs, detecting almost all known exoplanets within 50 pc. Precision Doppler RV spectrographs have traditionally fallen into two camps.
Gillian Nave, R. Paul Butler
doaj   +1 more source

Radial velocity follow-up of CoRoT transiting exoplanets

open access: yesEPJ Web of Conferences, 2011
We report on the results from the radial-velocity follow-up program performed to establish the planetary nature and to characterize the transiting candidates discovered by the space mission CoRoT.
Deleuil M.   +5 more
doaj   +1 more source

Home - About - Disclaimer - Privacy