Results 81 to 90 of about 2,851,278 (244)
VARIATIONS OF THE β CEPHEI Hα LINE PARAMETERS IN 1993 - 1998.
Odessa Astronomical Publications, 2017 We use high-dispersion CCD spectrograms obtained in 1993 - 1998 to study parameter variations of the absorption and emission components Hα line of the star β Cephei. We show that radial velocity of the emission component does not depend on star pulsation
E. A. Panko, A. E. Tarasov
doaj +1 more source
Dynamics of an ensemble of clumps embedded in a magnetized ADAF
, 2015 We investigate effects of a global magnetic field on the dynamics of an ensemble of clumps within a magnetized advection-dominated accretion flow by neglecting interactions between the clumps and then solving the collisionless Boltzman equation.
Khajenabi, Fazeleh, Rahmani, Mina
core +1 more source
Radial Velocity Fitting Challenge. I. Simulating the data set including realistic stellar radial-velocity signals [PDF]
, 2016 Stellar signals are the main limitation for precise radial-velocity (RV) measurements. These signals arise from the photosphere of the stars. The m/s perturbation created by these signals prevents the detection and mass characterization of small-mass ...
X. Dumusque, X. Dumusque
semanticscholar +1 more source
Wake Analysis of Wind Turbine Based on Scanning Images from Doppler Lidar
南方能源建设[Objective] To fully explore the data value of lidar in wind turbine wake observation, conduct an in-depth study on the three-dimensional (3D) wake structure and wind speed attenuation characteristics in wake zone, and further provide references for ...
Yanfeng CAI, Fareng YAO, Jiyan WANG
doaj +1 more source
A Young Planet Search in Visible and IR Light: DN Tau, V836 Tau, and V827 Tau
, 2008 In searches for low-mass companions to late-type stars, correlation between radial velocity variations and line bisector slope changes indicates contamination by large starspots.
Bevington +25 more
core +1 more source
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
Transactions of the International Astronomical Union, 1970 Les mesures de vitesse radiale (VR) ont été continuées par les trois techniques: prisme objectif, spectrographie à fente, interférométrie, avec des instruments en fonction à l’Observatoire de Haute Provence ainsi qu’à celui de l’ESO.Grand Nuage de Magellan: Le travail de 13 champs est pratiquement achevé et sera publié dès que les mesures de spectres ...
David S. Evans +5 more
openaire +1 more source
RADIAL VELOCITY MONITORING OF KEPLER HEARTBEAT STARS [PDF]
, 2016 Heartbeat stars (HB stars) are a class of eccentric binary stars with close periastron passages. The characteristic photometric HB signal evident in their light curves is produced by a combination of tidal distortion, heating, and Doppler boosting near ...
Avi Shporer +8 more
semanticscholar +1 more source
Radial velocity data analysis with compressed sensing techniques [PDF]
, 2016 We present a novel approach for analysing radial velocity data that combines two features: all the planets are searched at once and the algorithm is fast.
N. Hara, G. Bou'e, J. Laskar, A. Correia
semanticscholar +1 more source
Measurement of target radial velocity
Известия высших учебных заведений России: Радиоэлектроника, 2015 The multichannel and single-channel measuring instruments of target radial velocity with use multifrequency signals at presence correlated and non-correlated handicapes are synthesized.
D. I. Popov
doaj