English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We present radial velocities with an accuracy of 0.1 km/s for 2046 stars ofspectral type F,G,K, and M, based on 29000 spectra taken with the Keck Itelescope. We also present 131 FGKM standard stars, all of which exhibitconstant radial velocity for at least 10 years, with an RMS less than 0.03km/s. All velocities are measured relative to the solar system barycenter.Spectra of the Sun and of asteroids pin the zero-point of our velocities,yielding a velocity accuracy of 0.01 km/s for G2V stars. This velocityzero-point agrees within 0.01 \kms with the zero-points carefully determined byNidever et al. (2002) and Latham et al. (2002). For reference we compute thedifferences in velocity zero-points between our velocities and standard starsof the IAU, the Harvard-Smithsonian Center for Astrophysics, and l'Observatoirede Geneve, finding agreement with all of them at the level of 0.1 km/s. But ourradial velocities (and those of all other groups) contain no corrections forconvective blueshift or gravitational redshifts (except for G2V stars), leavingthem vulnerable to systematic errors of 0.2 \kms for K dwarfs and ~0.3 km/s forM dwarfs due to subphotospheric convection, for which we offer velocitycorrections. The velocities here thus represent accurately the radial componentof each star's velocity vector. The radial velocity standards presented hereare designed to be useful as fundamental standards in astronomy. They may beuseful for Gaia (Crifo et al. 2010, Gilmore et al. 2012} and for dynamicalstudies of such systems as long-period binary stars, star clusters, Galacticstructure, and nearby galaxies, as will be carried out by SDSS, RAVE, APOGEE,SkyMapper, HERMES, and LSST.

Precise Radial Velocities of 2046 Nearby FGKM Stars and 131 Standards