No significant correlation between radial velocity planet presence and debris disc properties

A correlation between surface gravity and radial velocity variation and a statistical investigation of companion properties

Context. Since 1999, we have been conducting a radial velocity survey of 179 K giants using the Coudé Auxiliary Telescope at UCO/Lick observatory. At present ∼20−100 measurements have been collected per star with a precision of 5 to 8 m s−1. Of the stars monitored, 145 (80%) show radial velocity (RV) variations at a level >20 m s−1, of which 43 exhibit significant periodicities. Aims. Our aim i...

Recovering planet radial velocity signals in the presence of starspot activity in fully convective stars

Accounting for stellar activity is a crucial component of the search for ever-smaller planets orbiting stars of all spectral types. We use Doppler imaging methods to demonstrate that starspot-induced radial velocity variability can be effectively reduced for moderately rotating, fully convective stars. Using starspot distributions extrapolated from sunspot observations, we adopt typical M dwarf...

incidence of microscopic lumbar intervertebral disc calcification and its correlation to endplate degeneration type and disc histopathologic angiogensis

چکیده ندارد.

Is there a planet in my radial-velocity data?

Optimal strategies of radial velocity observations in planet search surveys

Applications of the theory of optimal design of experiments to radial velocity planet search surveys are considered. Different optimality criteria are discussed, basing on the Fisher, Shannon, and Kullback-Leibler informations. Algorithms of optimal scheduling of RV observations for two important practical problems are considered. The first problem is finding the time for future observations to...