Planet Detection Limits for Barnard's Star


A 0.0010 arcsec amplitude perturbation would be found in the these data at a 1% false positive level with a 5% miss rate. Assuming MBarn = 0.12 M(solar) yields

 

 Freq (days^(-1))

 P (days)

  MJup

 0.0016

 600

 0.3

 0.003

 400

 0.45
 0.005

 200

 0.7
 0.007

 150

 0.8
 0.010

 100

 1.0
 0.020

 50

 1.7

 

We confirm and somewhat extend the limits obtained by Gatewood (1995, Ap&SS, 223, 91). Having removed power at ~ 0.006 day^-1, we have no detection capability at that frequency. Note that even though Barnard's Star is more distant and observed fewer times, we obtain detection limits similar to those for Proxima Cen.