Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published June 2014 | Published + Submitted
Book Section - Chapter Open

Empirical Limits on Radial Velocity - Planet Detection for Young Stars

Abstract

We report initial results from our long term search using precision radial velocities for planetary-mass companions located within a few AU of stars younger than the Sun. Based on a sample of >150 stars, we define a floor in the radial velocity scatter, σ_(RV), as a function of the chromospheric activity level R'_(HK). This lower bound to the jitter, which increases with increasing stellar activity, sets the minimum planet mass that could be detected. Adopting a median activity-age relationship reveals the astrophysical limits to planet masses discernable via radial velocity monitoring, as a function of stellar age. Considering solar-mass primaries having the mean jitter-activity level, when they are younger than 100 / 300 / 1000 Myr, the stochastic jitter component in radial velocity measurements restricts detectable companion masses to > 0.3 / 0.2 / 0.1 M_(Jupiter). These numbers require a large number — several tens — of radial velocity observations taken over a time frame longer than the orbital period. Lower companion mass limits can be achieved for stars with less than the mean jitter and/or with an increased number of observations.

Additional Information

Submitted on 15 Aug 2014.

Attached Files

Published - 092-Hillenbrand+_CS18.pdf

Submitted - 1408.3475.pdf

Files

092-Hillenbrand+_CS18.pdf
Files (784.7 kB)
Name Size Download all
md5:e15b8523b101e2557fb4c570aeeed9ab
276.6 kB Preview Download
md5:119a1a880289303bc24cc9de9c464f4e
508.0 kB Preview Download

Additional details

Created:
August 20, 2023
Modified:
October 26, 2023