On-sky speckle nulling demonstration at small angular separation with SCExAO

Abstract

This paper presents the first on-sky demonstration of speckle nulling, which was achieved at the Subaru Telescope in the context of the Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) Project. Despite the absence of a high-order high-bandwidth closed-loop AO system, observations conducted with SCExAO show that even in poor-to-moderate observing conditions, speckle nulling can be used to suppress static and slow speckles even in the presence of a brighter dynamic speckle halo, suggesting that more advanced high-contrast imaging algorithms developed in the laboratory can be applied to ground-based systems.

5 figures, accepted for publication by PASP

References in corpus (1)

• Astrometry and Photometry with Coronagraphs

Cited by in corpus (9)

• The W. M. Keck Observatory infrared vortex coronagraph and a first image of HIP79124 B
• The coronagraphic Modal Wavefront Sensor: a hybrid focal-plane sensor for the high-contrast imaging of circumstellar environments
• Speckle suppression and companion detection using coherent differential imaging
• Lessons for WFIRST CGI from ground-based high-contrast systems
• Apodized vortex coronagraph designs for segmented aperture telescopes
• A high precision technique to correct for residual atmospheric dispersion in high-contrast imaging systems
• Developing post-coronagraphic, high-resolution spectroscopy for terrestrial planet characterization on ELTs
• CHARIS Science: Performance Simulations for the Subaru Telescope's Third-Generation of Exoplanet Imaging Instrumentation
• SEEDS direct imaging of the RV-detected companion to V450 Andromedae, and characterization of the system