Performance and early science with the Subaru Coronagraphic Extreme Adaptive Optics project

We describe the current performance of the Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) instrument on the Subaru telescope on Maunakea, Hawaii and present early science results for SCExAO coupled with the CHARIS integral field spectrograph. SCExAO now delivers H band Strehl ratios up to ~0.92, extreme AO corrections for optically faint stars, and planet-to-star contrasts rivaling that of GPI and SPHERE. CHARIS yield high signal-to-noise detections and 1.1—2.4 micron spectra of benchmark directly-imaged companions like HR 8799 cde and kappa And b that clarify their atmospheric properties. We show how spectra and astrometry for kappa And b lead to a reevaluation of this object's nature. Finally, we briefly describe plans for a SCExAO-focused direct imaging campaign to directly image and characterize young exoplanets, planet-forming disks, and (later) mature planets in reflected light.

[1]  Timothy D. Brandt.  The Hipparcos–Gaia Catalog of Accelerations , 2018, The Astrophysical Journal Supplement Series.

[2]  Tae-Soo Pyo,et al.  A COMBINED SUBARU/VLT/MMT 1–5 μm STUDY OF PLANETS ORBITING HR 8799: IMPLICATIONS FOR ATMOSPHERIC PROPERTIES, MASSES, AND FORMATION , 2011, 1101.1973.

[3]  Timothy D. Brandt,et al.  SCExAO/CHARIS Near-IR High-contrast Imaging and Integral Field Spectroscopy of the HIP 79977 Debris Disk , 2018, The Astronomical Journal.

[4]  Gautam Vasisht,et al.  THE κ ANDROMEDAE SYSTEM: NEW CONSTRAINTS ON THE COMPANION MASS, SYSTEM AGE, AND FURTHER MULTIPLICITY , 2013, 1309.3372.

[5]  A. Burrows,et al.  RESOLVING THE HD 100546 PROTOPLANETARY SYSTEM WITH THE GEMINI PLANET IMAGER: EVIDENCE FOR MULTIPLE FORMING, ACCRETING PLANETS , 2015, 1511.02526.

[6]  Andrew W. Serio,et al.  First light of the Gemini Planet Imager , 2014, Proceedings of the National Academy of Sciences.

[7]  Julien H. Girard,et al.  Discovery of a warm, dusty giant planet around HIP 65426 , 2017, 1707.01413.

[8]  Olivier Guyon,et al.  Spatial linear dark field control: stabilizing deep contrast for exoplanet imaging using bright speckles , 2017 .

[9]  B. Macintosh,et al.  Images of a fourth planet orbiting HR 8799 , 2010, Nature.

[10]  A. Skemer,et al.  Accreting protoplanets in the LkCa 15 transition disk , 2015, Nature.

[11]  L. Hartmann,et al.  On the Diversity of the Taurus Transitional Disks: UX Tauri A and LkCa 15 , 2007, 0710.2892.

[12]  D. Fantinel,et al.  Blobs, spiral arms, and a possible planet around HD 169142 , 2019, Astronomy & Astrophysics.

[13]  B. Macintosh,et al.  Clouds and Chemistry in the Atmosphere of Extrasolar Planet HR8799b , 2011, 1103.3895.

[14]  Timothy D. Brandt,et al.  DIRECT IMAGING DISCOVERY OF A “SUPER-JUPITER” AROUND THE LATE B-TYPE STAR κ And , 2012, 1211.3744.

[15]  B. Macintosh,et al.  Angular Differential Imaging: A Powerful High-Contrast Imaging Technique , 2005, astro-ph/0512335.

[16]  Jason J. Wang,et al.  Discovery and spectroscopy of the young jovian planet 51 Eri b with the Gemini Planet Imager , 2015, Science.

[17]  Dmitry Savransky,et al.  The Gemini Planet Imager Exoplanet Survey: Giant Planet and Brown Dwarf Demographics from 10 to 100 au , 2019, The Astronomical Journal.

[18]  Julien Lozi,et al.  Wavefront control architecture and expected performance for the TMT Planetary Systems Imager , 2018, Astronomical Telescopes + Instrumentation.

[19]  Julien H. Girard,et al.  CONFIRMATION OF THE PLANET AROUND HD 95086 BY DIRECT IMAGING , 2013, 1310.7483.

[20]  Frantz Martinache,et al.  Isochronal age-mass discrepancy of young stars: SCExAO/CHARIS integral field spectroscopy of the HIP 79124 triple system , 2018, Astronomy & Astrophysics.

[21]  D. Fantinel,et al.  Discovery of a planetary-mass companion within the gap of the transition disk around PDS 70 , 2018, Astronomy & Astrophysics.

[22]  Frantz Martinache,et al.  A Chromaticity Analysis and PSF Subtraction Techniques for SCExAO/CHARIS Data , 2019, The Astronomical Journal.

[23]  Lunar,et al.  1–2.4 μm Near-IR Spectrum of the Giant Planet β Pictoris b Obtained with the Gemini Planet Imager , 2017, 1703.00011.

[24]  Julien Lozi,et al.  MagAO-X: project status and first laboratory results , 2018, Astronomical Telescopes + Instrumentation.

[25]  D. Wilner,et al.  A CLOSER LOOK AT THE LkCa 15 PROTOPLANETARY DISK , 2011, 1110.3865.

[26]  Bruce Macintosh,et al.  GPI PSF subtraction with TLOCI: the next evolution in exoplanet/disk high-contrast imaging , 2014, Astronomical Telescopes and Instrumentation.

[27]  Timothy D. Brandt,et al.  THE MOVING GROUP TARGETS OF THE SEEDS HIGH-CONTRAST IMAGING SURVEY OF EXOPLANETS AND DISKS: RESULTS AND OBSERVATIONS FROM THE FIRST THREE YEARS , 2013, 1305.7264.

[28]  Julien H. Girard,et al.  SPHERE: the exoplanet imager for the Very Large Telescope , 2019, Astronomy & Astrophysics.

[29]  B. Macintosh,et al.  Direct Imaging of Multiple Planets Orbiting the Star HR 8799 , 2008, Science.

[30]  Frantz Martinache,et al.  SCExAO/CHARIS Near-infrared Direct Imaging, Spectroscopy, and Forward-Modeling of κ And b: A Likely Young, Low-gravity Superjovian Companion , 2018, The Astronomical Journal.

[31]  David Mouillet,et al.  Discovery of a low-mass companion inside the debris ring surrounding the F5V star HD 206893 , 2016, 1612.00333.

[32]  Christoph Mordasini,et al.  Hints for a Turnover at the Snow Line in the Giant Planet Occurrence Rate , 2018, The Astrophysical Journal.

[33]  A. Boccaletti,et al.  A Giant Planet Imaged in the Disk of the Young Star β Pictoris , 2010, Science.

[34]  C. Moutou,et al.  High-contrast imaging of Sirius A with VLT/SPHERE: looking for giant planets down to one astronomical unit , 2015, 1509.00015.

[35]  Jeremy Jones,et al.  THE AGE OF THE DIRECTLY IMAGED PLANET HOST STAR κ ANDROMEDAE DETERMINED FROM INTERFEROMETRIC OBSERVATIONS , 2016, 1604.02176.

[36]  Alan P. Boss,et al.  Giant Planet Formation by Gravitational Instability , 1997 .

[37]  C. A. Grady,et al.  A STATISTICAL ANALYSIS OF SEEDS AND OTHER HIGH-CONTRAST EXOPLANET SURVEYS: MASSIVE PLANETS OR LOW-MASS BROWN DWARFS? , 2014, 1404.5335.

[38]  Craig Loomis,et al.  Data reduction pipeline for the CHARIS integral-field spectrograph I: detector readout calibration and data cube extraction , 2017, 1706.03067.

[39]  Timothy D. Brandt,et al.  Laboratory and On-sky Validation of the Shaped Pupil Coronagraph’s Sensitivity to Low-order Aberrations With Active Wavefront Control , 2018, 1801.09760.

[40]  Gautam Vasisht,et al.  Characterizing 51 Eri b from 1 to 5 μm: A Partly Cloudy Exoplanet , 2017, 1705.03887.

[41]  Frantz Martinache,et al.  SCExAO, an instrument with a dual purpose: perform cutting-edge science and develop new technologies , 2018, Astronomical Telescopes + Instrumentation.

[42]  D. Fantinel,et al.  First light of the VLT planet finder SPHERE IV : Physical and chemical properties of the planets around HR8799 , 2015, 1511.04082.

[43]  M. Ireland,et al.  LkCa 15: A YOUNG EXOPLANET CAUGHT AT FORMATION? , 2011, 1110.3808.

[44]  Eugene Pluzhnik,et al.  Developing linear dark-field control for exoplanet direct imaging in the laboratory and on ground-based telescopes , 2019, Optical Engineering + Applications.

[45]  Serge Correia,et al.  DIRECT IMAGING AND SPECTROSCOPY OF A CANDIDATE COMPANION BELOW/NEAR THE DEUTERIUM-BURNING LIMIT IN THE YOUNG BINARY STAR SYSTEM, ROXs 42B , 2013, 1310.4825.

[46]  Laurent Pueyo,et al.  pyKLIP: PSF Subtraction for Exoplanets and Disks , 2015 .

[47]  Frantz Martinache,et al.  Multi-epoch Direct Imaging and Time-variable Scattered Light Morphology of the HD 163296 Protoplanetary Disk , 2018, The Astrophysical Journal.

[48]  B. Macintosh,et al.  M-BAND IMAGING OF THE HR 8799 PLANETARY SYSTEM USING AN INNOVATIVE LOCI-BASED BACKGROUND SUBTRACTION TECHNIQUE , 2011, 1107.0967.

[49]  G. Perrin,et al.  The Subaru Coronagraphic Extreme Adaptive Optics System: Enabling High-Contrast Imaging on Solar-System Scales , 2015, 1507.00017.

[50]  Adam Burrows,et al.  DIRECT IMAGING CONFIRMATION AND CHARACTERIZATION OF A DUST-ENSHROUDED CANDIDATE EXOPLANET ORBITING FOMALHAUT , 2012, 1210.6620.

[51]  Frantz Martinache,et al.  No Clear, Direct Evidence for Multiple Protoplanets Orbiting LkCa 15: LkCa 15 bcd are Likely Inner Disk Signals , 2019, The Astrophysical Journal.