Stellar jitter from variable gravitational redshift: implications for radial velocity confirmation of habitable exoplanets
Stellar jitter from variable gravitational redshift: implications for radial velocity confirmation of habitable exoplanets
A variation of gravitational redshift, arising from stellar radius fluctuations, will introduce astrophysical noise into radial velocity measurements by shifting the centroid of the observed spectral lines. Shifting the centroid does not necessarily introduce line asymmetries. This is fundamentally different from other types of stellar jitter so far identified, which …