No Clear, Direct Evidence for Multiple Protoplanets Orbiting LkCa 15: LkCa 15 bcd are Likely Inner Disk Signals

NASA Senior Postdoctoral Fellowship; NASA/Keck grant [LK-2663-948181]; CONICYT-FONDECYT [1171246]; project CONICYT PAI/Concurso Nacional Insercion en la Academia, convocatoria 2015 [79150049]; JSPS KAKENHI [18H05442, 15H02063]; National Aeronautics and Space Administration; Subaru Time Allocation Committe; NASA/Keck Time Allocation Committe

[1]  Olivier Guyon,et al.  The CHARIS IFS for high contrast imaging at Subaru , 2015, SPIE Optical Engineering + Applications.

[2]  Etienne Artigau,et al.  A New Algorithm for Point-Spread Function Subtraction in High-Contrast Imaging: A Demonstration with Angular Differential Imaging , 2007, astro-ph/0702697.

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

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

[5]  Vanessa P. Bailey,et al.  Imaging protoplanets: observing transition disks with non-redundant masking , 2016, Astronomical Telescopes + Instrumentation.

[6]  Clarifying the Status of HD 100546 as Observed by the Gemini Planet Imager , 2017, 1712.02819.

[7]  Frantz Martinache,et al.  Sparse-aperture adaptive optics , 2006, SPIE Astronomical Telescopes + Instrumentation.

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

[9]  Frantz Martinache,et al.  MAPPING THE SHORES OF THE BROWN DWARF DESERT. II. MULTIPLE STAR FORMATION IN TAURUS–AURIGA , 2011, 1101.4016.

[10]  P. Schneider,et al.  Spectro-astrometry of the pre-transitional star LkCa 15 does not reveal an accreting planet but extended Hα emission , 2018, Astronomy & Astrophysics.

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

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

[13]  Bertrand Mennesson,et al.  FUNDAMENTAL LIMITATIONS OF HIGH CONTRAST IMAGING SET BY SMALL SAMPLE STATISTICS , 2014, 1407.2247.

[14]  A. Boccaletti,et al.  RESOLVING THE PLANET-HOSTING INNER REGIONS OF THE LkCa 15 DISK , 2016, 1608.08642.

[15]  Ruobing Dong,et al.  What is the Mass of a Gap-Opening Planet? , 2016, 1612.04821.

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

[17]  Sarah E. Dodson-Robinson,et al.  TRANSITIONAL DISKS AS SIGNPOSTS OF YOUNG, MULTIPLANET SYSTEMS , 2011, 1106.4824.

[18]  C. Marois,et al.  Confidence Level and Sensitivity Limits in High-Contrast Imaging , 2007, 0709.3548.

[19]  National Astronomical Observatory of Japan,et al.  The architecture of the LkCa 15 transitional disk revealed by high-contrast imaging⋆ , 2014, 1402.1766.

[20]  C. Dominik,et al.  Full two-dimensional radiative transfer modelling of the transitional disk LkCa 15 , 2010, 1001.2146.

[21]  A. Lagrange,et al.  Sparse aperture masking at the VLT. I. Faint companion detection limits for the two debris disk stars HD 92945 and HD 141569 , 2011, 1107.1426.

[22]  R. Soummer,et al.  DETECTION AND CHARACTERIZATION OF EXOPLANETS AND DISKS USING PROJECTIONS ON KARHUNEN–LOÈVE EIGENIMAGES , 2012, 1207.4197.

[23]  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.

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

[25]  A. Burrows,et al.  DEEP THERMAL INFRARED IMAGING OF HR 8799 bcde: NEW ATMOSPHERIC CONSTRAINTS AND LIMITS ON A FIFTH PLANET , 2014, 1409.5134.

[26]  Julien H. Girard,et al.  Investigation of the inner structures around HD 169142 with VLT/SPHERE , 2017, 1709.01734.

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

[28]  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.

[29]  Laird M. Close,et al.  NEW SPATIALLY RESOLVED OBSERVATIONS OF THE T Cha TRANSITION DISK AND CONSTRAINTS ON THE PREVIOUSLY CLAIMED SUBSTELLAR COMPANION , 2015, 1501.01964.

[30]  C. Moutou,et al.  Inner disk structure of the classical T Tauri star LkCa 15 , 2018, Astronomy & Astrophysics.

[31]  Gijs D. Mulders,et al.  Planet or brown dwarf? Inferring the companion mass in HD 100546 from the wall shape using mid-infrared interferometry , 2013, 1306.4264.

[32]  Timothy D. Brandt,et al.  A RESOLVED NEAR-INFRARED IMAGE OF THE INNER CAVITY IN THE GM Aur TRANSITIONAL DISK , 2016, 1610.03913.

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

[34]  M. Min,et al.  Radiative transfer in very optically thick circumstellar disks , 2009, 0902.3092.

[35]  Laurent Pueyo,et al.  DETECTION AND CHARACTERIZATION OF EXOPLANETS USING PROJECTIONS ON KARHUNEN–LOEVE EIGENIMAGES: FORWARD MODELING , 2016, 1604.06097.

[36]  Subaru Telescope,et al.  IMAGING OF A TRANSITIONAL DISK GAP IN REFLECTED LIGHT: INDICATIONS OF PLANET FORMATION AROUND THE YOUNG SOLAR ANALOG LkCa 15 , 2010, 1005.5162.

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

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

[39]  Timothy D. Brandt,et al.  Near-infrared imaging polarimetry of LkCa 15: A possible warped inner disk. , 2016, Publications of the Astronomical Society of Japan. Nihon Tenmon Gakkai.

[40]  Joseph E. Rodriguez,et al.  Identification of Young Stellar Variables with KELT for K2. I. Taurus Dippers and Rotators , 2017, 1703.02522.

[41]  Julien Lozi,et al.  Subaru/SCExAO First-light Direct Imaging of a Young Debris Disk around HD 36546 , 2017 .

[42]  John D. Monnier,et al.  RESOLVING THE GAP AND AU-SCALE ASYMMETRIES IN THE PRE-TRANSITIONAL DISK OF V1247 ORIONIS , 2013, 1304.2768.

[43]  N. Calvet,et al.  Far-infrared to Millimeter Data of Protoplanetary Disks: Dust Growth in the Taurus, Ophiuchus, and Chamaeleon I Star-forming Regions , 2017, 1710.08426.

[44]  C. Marois,et al.  A NEW ALGORITHM FOR POINT SPREAD FUNCTION SUBTRACTION IN HIGH-CONTRAST IMAGING: A DEMONSTRATION WITH ANGULAR DIFFERENTIAL IMAGING , 2007 .

[45]  Adam L. Kraus,et al.  SPARSE APERTURE MASKING OBSERVATIONS OF THE FL Cha PRE-TRANSITIONAL DISK , 2012, 1211.5721.

[46]  Timothy D. Brandt,et al.  High-Resolution Near-Infrared Polarimetry of a Circumstellar Disk around UX Tau A , 2012, 1206.1215.

[47]  Julien Lozi,et al.  First light of the CHARIS high-contrast integral-field spectrograph , 2017, Optical Engineering + Applications.

[48]  J. Muzerolle,et al.  A SPITZER IRS STUDY OF INFRARED VARIABILITY IN TRANSITIONAL AND PRE-TRANSITIONAL DISKS AROUND T TAURI STARS , 2010, 1012.3500.

[49]  Jean-Pierre Véran,et al.  Exoplanet imaging with LOCI processing: photometry and astrometry with the new SOSIE pipeline , 2010, Astronomical Telescopes + Instrumentation.

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

[51]  K. H. Kim,et al.  V819 TAU: A RARE WEAK-LINED T TAURI STAR WITH A WEAK INFRARED EXCESS , 2009, 0911.0035.

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

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

[54]  Luca Ricci,et al.  SEARCHING FOR CIRCUMPLANETARY DISKS AROUND LkCa 15 , 2014, 1404.5627.

[55]  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.

[56]  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.