Solar image analysis shows typical astrometric jitter of 0.342 μas pc from activity, below the ~3 μas Earth-planet signal at 1 pc, so stellar contamination does not prevent Earth-like exoplanet astrometry around Sun-like stars.
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A 1-norm robust periodogram is introduced for non-Gaussian irregular time series and applied to 259 quasars, identifying 49 with quasi-periodic signals above 3σ.
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Astrometric exoplanet detection survives solar-like stellar contamination
Solar image analysis shows typical astrometric jitter of 0.342 μas pc from activity, below the ~3 μas Earth-planet signal at 1 pc, so stellar contamination does not prevent Earth-like exoplanet astrometry around Sun-like stars.
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Robust 1-norm periodograms for analysis of noisy non-Gaussian time series with irregular cadences: Application to VLBI astrometry of quasars
A 1-norm robust periodogram is introduced for non-Gaussian irregular time series and applied to 259 quasars, identifying 49 with quasi-periodic signals above 3σ.