@inproceedings{429f7921453c4f088f8a2cb09a31f49e,
title = "A new type of exoplanet direct imaging search: A SCExAO/CHARIS survey of accelerating stars",
abstract = "We present first results from a new exoplanet direct imaging survey being carried out with the Subaru Coronagraphic Extreme Adaptive Optics project coupled with the CHARIS integral field spectrograph. Our survey targeting stars showing evidence for a statistically significant astrometric acceleration from the Hipparcos and Gaia satellites implying the existence of substellar or planetary companions at sub-Arcsecond separations. JHK low-resolution spectra from CHARIS constrain newly-discovered companion spectral types, temperatures, and gravities. Relative astrometry of companions from SCExAO/CHARIS and absolute astrometry of the star from Hipparcos and Gaia together yield direct dynamical mass constraints, circumventing usual challenges in inferring the masses of imaged planets from luminosity evolution models. Even in its infancy, our survey has already yielded multiple discoveries, including at least one likely jovian planet at a moderate orbital separation and multiple other substellar companions. We describe how our small nascent survey is yielding a far higher detection rate than large blind surveys from GPI and SPHERE and the path forward for imaging and characterizing planets at lower masses and smaller orbital separations than previously possible.",
keywords = "Adaptive optics, Extrasolar planets, Infrared",
author = "Thayne Currie and Brandt, {Timothy D.} and Masayuki Kuzuhara and Jeffrey Chilcote and Edward Cashman and Liu, {R. Y.} and Kellen Lawson and Taylor Tobin and Brandt, {G. Mirek} and Olivier Guyon and Julien Lozi and Vincent Deo and Sebastien Vievard and Kyoohun Ahn and Nour Skaf",
note = "Funding Information: We thank the Subaru Time Allocation Committee for their generous support of this program. TC was supported by a NASA Senior Postdoctoral Fellowship and NASA/Keck grant LK-2663-948181. TB gratefully acknowledges support from the Heising-Simons foundation and from NASA under grant #80NSSC18K0439. Funding Information: The development of SCExAO was supported by JSPS (Grant-in-Aid for Research #23340051, #26220704 & #23103002), Astrobiology Center of NINS, Japan, the Mt Cuba Foundation, and the director{\textquoteright}s contingency fund at Subaru Telescope. CHARIS was developed under the support by the Grant-in-Aid for Scientific Research on Innovative Areas #2302. Publisher Copyright: {\textcopyright} COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.; Techniques and Instrumentation for Detection of Exoplanets X 2021 ; Conference date: 01-08-2021 Through 05-08-2021",
year = "2021",
doi = "10.1117/12.2595001",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Shaklan, {Stuart B.} and Ruane, {Garreth J.}",
booktitle = "Techniques and Instrumentation for Detection of Exoplanets X",
}