CRIRES (VLT) Radial Velocity Sensitivity

Click For Summary
SUMMARY

CRIRES (Cryogenic Infrared Echelle Spectrograph) is currently unstable but is expected to resume full operation next year. The sensitivity limit for radial velocity measurements is a key concern, particularly for late-type stars (late F, G, K, and M). Early-type stars exhibit faster rotation, leading to rotational broadening of spectral lines, which complicates accurate radial velocity measurements. This discussion highlights the challenges associated with measuring radial velocity in different stellar types.

PREREQUISITES
  • Understanding of CRIRES functionality and specifications
  • Knowledge of radial velocity measurement techniques
  • Familiarity with stellar classification, particularly late-type stars
  • Basic principles of spectral line broadening
NEXT STEPS
  • Research CRIRES operational specifications and updates
  • Study techniques for improving radial velocity measurements
  • Explore the effects of rotational broadening on spectral analysis
  • Investigate the characteristics of late-type stars in astrophysics
USEFUL FOR

Astronomers, astrophysicists, and researchers focused on stellar dynamics and radial velocity measurements, particularly those working with CRIRES and late-type stars.

natski
Messages
262
Reaction score
2
I know CRIRES is unstable right now but it should be back to full operation next year I hear. Does anyone know what it's limit of sensitivity will be for radial velcoity measurements (in m/s)?
 
Astronomy news on Phys.org
Just as a follow-up question, am I correct in saying that radial velcoity measurements are usually limited to late type stars (late F, G, K and M)?
 
Usually, yes. Earlier stars typically spin faster, and this causes rotational broadening of the spectral lines. This makes it more difficult to fit to template spectra, and therefore more difficult to get accurate radial velocity measurements.
 

Similar threads

Graduate New Radial Velocity Experiment (RAVE) Data Release
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad NANOGrav results on Thursday (June 29)
  • · Replies 8 ·
Replies
8
Views
3K
Graduate Proper Motion, Radial Velocity
  • · Replies 4 ·
Replies
4
Views
5K
Undergrad How feasible is home radio astronomy?
  • · Replies 93 ·
4
Replies
93
Views
14K
EMF (Electromagnetic Field) & EHS (Electromagnetic Hyper Sensitivity)
  • · Replies 3 ·
Replies
3
Views
1K
Graduate Average value of sin(i) in radial velocities (exoplanets)
  • · Replies 1 ·
Replies
1
Views
3K
Undergrad Orbital maneuver by applying a thrust in the radial direction
  • · Replies 62 ·
3
Replies
62
Views
8K
Undergrad Back of the envelope estimate, energy flow in a box of plasma
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Centrifuge and Radial Bouyancy in space
  • · Replies 6 ·
Replies
6
Views
3K
Graduate Find radial velocity of star from orbiting body
  • · Replies 2 ·
Replies
2
Views
5K