High contrast imaging testbed for the Terrestrial Planet Finder Coronagraph
. . .viability. This paper describes the current testbed design and preliminary experimental results.
Sli, Fang↗
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On Lateral Viscosity Contrast in the Mantle and the Rheology of Low Frequency Geodynamics
Recent developments in global seismic tomography provide three-dimensional views of S-wave structure throughout the mantle.
mantle↗
High accuracy coronagraph flight WFC model for WFIRST-CGI raw contrast sensitivity analysis
UNKNOWN
Poberezhskiy, Ilya↗
Sensitivity of WFIRST coronagraph broadband contrast performance to DM actuator errors
UNKNOWN
Trauger, John T.↗
High Contrast Imaging for Astrophysics
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Daniel Batcheldor↗
SCExAO/CHARIS High-contrast Imaging of Spirals and Darkening Features in the HD 34700 A Protoplanetary Disk
We present Subaru/SCExAO+Coronagraphic High Angular Resolution Imaging Spectrograph (CHARIS) broadband (JHK-band) integral field spectroscopy of HD 34700 A. CHARIS data recover HD 34700 A's disk ring and confirm multiple spirals discovered by Monnier et al. We set limits on substellar companions of ∼12 MJup at 0.″3 (in the ring gap) and ∼5 M(Jup) at 0."75 (outside the ring). The data reveal darkening effects on the ring and spiral, although we do not identify the origin of each feature such as shadows or physical features related to the outer spirals. Geometric albedos converted from the surface brightness suggest a greater scale height and/or prominently abundant submicron dust at position angles between ∼45° and 90°. Spiral fitting resulted in very large pitch angles (∼30°–50°); a stellar flyby of HD 34700 B or infall from a possible envelope is perhaps a reasonable scenario to explain the large pitch angles.
Taichi Uyama↗