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Astrophysics Research Centre

School of Mathematics and Physics


Astrophysical noise reduction

Link to Leverhulme grant research.

Some simulation results. Click on images for full size versions.

1. simulated radial velocity measurements of a planet-hosting star with radial-velocity jitter induced by the presence of multiple star-spots. Simulations include macro-turbulence, rotational broadening and instrumental broadening. Currently these simulations are limited to a handful of rotation rates and spectral-types and are very much a work-in-progress.

2. the recovered planet signature after applying stellar jitter reduction algorithms. Please note the change in the radial velocity scale from Fig. 1.

3. the 'injected' planet radial velocity curve for comparison (on the same scale as Fig. 2).

4. the O-C of 'injected' (C=Calculated) planet radial velocities in our simulation versus 'recovered' (O=Observed) planet velocities extracted from data severely contaminated by astrophysical noise. Please note the vastly reduced radial velocity scale. Radial velocity jitter due to astrophysical noise has been reduced from the 100 m/s level in places to typically only a few m/s in this simulation.

users/cawatson/astrophysical_noise_reduction.txt · Last modified: 2014/06/12 10:13 by Chris Watson


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