Radial velocity observations of VB10 [PDF]
EPJ Web of Conferences, 2011 VB 10 is the smallest star known to harbor a planet according to the recent astrometric study of Pravdo & Shaklan [1]. Here we present near-infrared (J-band) radial velocity of VB 10 performed from high resolution (R~20,000) spectroscopy (NIRSPEC/KECK II).
M. R. Zapatero Osorio +6 more
openaire +4 more sources
Photometry as a proxy for stellar activity in radial velocity analyses [PDF]
Astronomical Journal, 2020 Stellar activity remains a limiting factor in measuring precise planet parameters from radial velocity spectroscopy, not least in the search for Earth mass planets orbiting in the habitable zones of Sun-like stars.
Crossfield, Ian J. M. +1 more
core +2 more sources
RadVel: The Radial Velocity Modeling Toolkit [PDF]
, 2018 RadVel is an open source Python package for modeling Keplerian orbits in radial velocity (RV) time series. RadVel provides a convenient framework to fit RVs using maximum a posteriori optimization and to compute robust confidence intervals by sampling ...
Blunt, Sarah +3 more
core +4 more sources
Radial-velocity fitting challenge [PDF]
, 2017 Context. Radial-velocity (RV) signals arising from stellar photospheric phenomena are the main limitation for precise RV measurements. Those signals induce RV variations an order of magnitude larger than the signal created by the orbit of Earth-twins, thus preventing their detection.
Dumusque, X. +24 more
openaire +6 more sources
Long-lived, long-period radial velocity variations in Aldebaran: A planetary companion and stellar activity [PDF]
, 2015 We investigate the nature of the long-period radial velocity variations in Alpha Tau first reported over 20 years ago. We analyzed precise stellar radial velocity measurements for Alpha Tau spanning over 30 years.
Cochran, W. D. +16 more
core +2 more sources
Signals embedded in the radial velocity noise [PDF]
EPJ Web of Conferences, 2013 Bayesian data analysis techniques, together with suitable statistical models, can be used to obtain much more information from noisy data than the traditional frequentist methods. For instance, when searching for periodic signals in noisy data, the Bayesian techniques can be used to define exact detection criteria for low-amplitude signals - the most ...
Mikko Tuomi, Mikko Tuomi
openaire +4 more sources
The California Legacy Survey. I. A Catalog of 178 Planets from Precision Radial Velocity Monitoring of 719 Nearby Stars over Three Decades [PDF]
Astrophysical Journal Supplement Series, 2021 We present a high-precision radial velocity (RV) survey of 719 FGKM stars, which host 164 known exoplanets and 14 newly discovered or revised exoplanets and substellar companions.
L. Rosenthal +22 more
semanticscholar +1 more source
orvara: An Efficient Code to Fit Orbits Using Radial Velocity, Absolute, and/or Relative Astrometry [PDF]
Astronomical Journal, 2021 We present an open-source Python package, Orbits from Radial Velocity, Absolute, and/or Relative Astrometry (orvara), to fit Keplerian orbits to any combination of radial velocity, relative astrometry, and absolute astrometry data from the Hipparcos-Gaia
Timothy D. Brandt +7 more
semanticscholar +1 more source
The Solar Neighborhood XLVIII: Nine Giant Planets Orbiting Nearby K Dwarfs, and the CHIRON Spectrograph’s Radial Velocity Performance [PDF]
Astronomical Journal, 2021 We report initial results of a large radial velocity survey of K dwarfs up to a distance of 50 pc from the solar system, to look for stellar, brown dwarf, and Jovian planets using radial velocities from the CHIRON spectrograph on the CTIO/SMARTS 1.5 m ...
L. Paredes +7 more
semanticscholar +1 more source
Public HARPS radial velocity database corrected for systematic errors [PDF]
Astronomy & Astrophysics, 2020 Context. The High Accuracy Radial velocity Planet Searcher (HARPS) spectrograph has been mounted since 2003 at the ESO 3.6 m telescope in La Silla and provides state-of-the-art stellar radial velocity (RV) measurements with a precision down to ∼1 m s−1 ...
T. Trifonov +5 more
semanticscholar +1 more source