Results 11 to 20 of about 502,910 (303)
Alexandria Engineering Journal, 2023 This paper presents a study on the influence of inlet radial angle in a multi-inlet cyclone separator using Eulerian-Lagrangian (EL) fluid dynamics approach. The investigation focuses on the behavior of air and solid particles within the cyclone.
Ibrahim Ademola Fetuga +9 more
doaj +1 more source
Turbulence characterization from a forward-looking nacelle lidar [PDF]
Wind Energy Science, 2017 We present two methods to characterize turbulence in the turbine inflow using radial velocity measurements from nacelle-mounted lidars. The first uses a model of the three-dimensional spectral velocity tensor combined with a model of the spatial ...
A. Peña, J. Mann, N. Dimitrov
doaj +1 more source
An Extreme-precision Radial-velocity Pipeline: First Radial Velocities from EXPRES [PDF]
The Astronomical Journal, 2020 Abstract The EXtreme-PREcision Spectrograph (EXPRES) is an environmentally stabilized, fiber-fed, R = 137,500, optical spectrograph. It was recently commissioned at the 4.3 m Lowell Discovery Telescope near Flagstaff, Arizona. The spectrograph was designed with a target radial-velocity (RV) precision of 30 cm s−1.
Ryan R. Petersburg +15 more
openaire +3 more sources
First radial velocity results from the MINiature Exoplanet Radial Velocity Array (MINERVA) [PDF]
, 2019 The MINiature Exoplanet Radial Velocity Array (MINERVA) is a dedicated observatory of four 0.7m robotic telescopes fiber-fed to a KiwiSpec spectrograph. The MINERVA mission is to discover super-Earths in the habitable zones of nearby stars.
Baker, Ashley D. +54 more
core +1 more source
The TESS-Keck Survey. XVI. Mass Measurements for 12 Planets in Eight Systems
The Astronomical Journal, 2023 With JWST’s successful deployment and unexpectedly high fuel reserves, measuring the masses of sub-Neptunes transiting bright, nearby stars will soon become the bottleneck for characterizing the atmospheres of small exoplanets via transmission ...
Joseph M. Akana Murphy +47 more
doaj +1 more source
COMMISSION 30: RADIAL VELOCITIES [PDF]
Proceedings of the International Astronomical Union, 2008 The past three-year period has seen steady efforts to collect large numbers of radial-velocity (RV) measurements, as well as important applications of radial velocities to astrophysics. Improvements in precision continue to be driven largely by exoplanet research.
Stephane Udry +11 more
openaire +6 more sources
Activity-induced radial velocity jitter in a flaring M dwarf [PDF]
, 2008 We investigate the effect of stellar activity and flares on short-term radial velocity measurements in the mid-M flare star CN Leo. Radial velocity variations are calculated from 181 UVES spectra obtained during three nights.
A. Reiners +17 more
core +2 more sources
Extrasolar planets and brown dwarfs around A-F type stars - VII. Theta Cygni radial velocity variations: planets or stellar phenomenon? [PDF]
, 2009 (abridged) In the frame of the search for extrasolar planets and brown dwarfs around early-type main-sequence stars, we present the results obtained on the early F-type star Theta Cygni. Elodie and Sophie at OHP were used to obtain the spectra.
A. Eggenberger +61 more
core +4 more sources
Journal of Fluid Science and Technology, 2014 In this study, the Schmidt number dependence of the scalar statistics and velocity-scalar joint statistics is investigated experimentally in a liquid axisymmetric jet.
Toshiki TAKEICHI +5 more
doaj +1 more source
Precise radial velocities of giant stars VIII. Testing for the presence of planets with CRIRES Infrared Radial Velocities [PDF]
, 2015 We have been monitoring 373 very bright (V < 6 mag) G and K giants with high precision optical Doppler spectroscopy for more than a decade at Lick Observatory.
Quirrenbach, Andreas +4 more
core +2 more sources