Results 71 to 80 of about 2,571,706 (401)
A Radial Velocity Search for Binary RR Lyrae Variables [PDF]
, 2021 We report 272 radial velocities for 19 RR Lyrae variables. For most of the stars we have radial velocities for the complete pulsation cycle. These data are used to determine robust center--of--mass radial velocities that have been compared to values from the literature in a search for evidence of binary systems.
arxiv +1 more source
The LCES HIRES/Keck Precision Radial Velocity Exoplanet Survey [PDF]
, 2017 We describe a 20 year survey carried out by the Lick-Carnegie Exoplanet Survey Team (LCES), using precision radial velocities from HIRES on the Keck I telescope to find and characterize extrasolar planetary systems orbiting nearby F, G, K, and M dwarf ...
P. Butler +10 more
semanticscholar +1 more source
GAIA Spectroscopy and Radial Velocities [PDF]
EAS Publications Series, 2002 proceedings of Les Houches 2001 summer school "GAIA, an European Space Project", published by Editions De Physique, 14 ...
openaire +3 more sources
AESTRA: Deep Learning for Precise Radial Velocity Estimation in the Presence of Stellar Activity
The Astronomical Journal, 2023 Stellar activity interferes with precise radial velocity measurements and limits our ability to detect and characterize planets, in particular Earth-like planets.
Yan Liang +2 more
doaj +1 more source
Remote Sensing, 2021 The strategy providing an estimation of both the mean velocity and the temporal and spatial spectra of radial velocity from data of the same pulse coherent Doppler lidar is proposed.
Viktor A. Banakh +3 more
doaj +1 more source
Radial Velocities with Gaia [PDF]
Proceedings of the International Astronomical Union, 2004 Gaia is a mission to map the positions and determine the velocities of 1 billion stars in the Galaxy, in order to determine how it was formed and how it has evolved. Spectroscopy provides one component of the space velocities for 200 million objects, and, in addition, astrophysical information such as temperature and metallicity for the brighter 40 ...
David Katz +4 more
openaire +2 more sources
A comprehensive radial velocity error budget for next generation Doppler spectrometers [PDF]
Astronomical Telescopes + Instrumentation, 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).
S. Halverson +16 more
semanticscholar +1 more source
The Joker: A Custom Monte Carlo Sampler for Binary-star and Exoplanet Radial Velocity Data [PDF]
, 2016 Given sparse or low-quality radial velocity measurements of a star, there are often many qualitatively different stellar or exoplanet companion orbit models that are consistent with the data.
A. Price-Whelan +3 more
semanticscholar +1 more source
Characterization of the radial velocity signal induced by rotation in late-type dwarfs [PDF]
, 2017 We investigate the activity induced signals related to rotation in late type stars (FGKM). We analyse the Ca II H&K, the H alpha and the radial velocity time-series of 55 stars using the spectra from the HARPS public database and the light-curves ...
A. Mascareno +3 more
semanticscholar +1 more source
European Physical Journal C: Particles and Fields, 2019 The significance of the radial velocity effects on the leading-order gravitational frequency shift in some special cases was reported recently. This paper investigates the gravitational shift of frequency of light propagating in the equatorial plane of a
Guansheng He, Chaohong Pan, Wenbin Lin
doaj +1 more source