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FORMATION AND EVOLUTION OF PLANETARY SYSTEMS: PROBING INITIAL CONDITIONS AND OUTCOMES WITH E-ELT Michael R. Meyer Institute for Astronomy Department of Physics (and many, many, others) HARMONI Early Science, Oxford, 2 July, 2015
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What we need to explain… Pepe, Ehrenreich, & Meyer, 2014, Nature, V513, 358
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Collapsing Cores & Specific Angular Momentum Williams & Cieza (2011) ARAA; see also Belloche (2013) Time M(accr)
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Structure of Protostellar Disks From M. Meyer, Physics World, November, 2009 Based on Dullemond et al. (2001) with artwork from R. Hurt (NASA) 1 AU 100 AU
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JWST/ELT Complementary Capabilities Physical Resolution: 15 pc 50 pc 150 pc 450 pc JWST 1.65 m 1 AU 3 AU 10 AU 30 AU 10 m 7 AU 20 AU 60 AU 180 AU ELT 1.65 m.2 AU.5 AU 1.5 AU 5 AU 10 m 1 AU 3 AU 10 AU 30 AU Spectral Resolution : R = 100 (molecular features) JWST R = 1000 (atomic features) JWST R = 10,000 (30 km/sec) ELT R = 100,000 (3 km/sec) ELT Field of View: 2’ (star clusters within 1 kpc) JWST 1.5” (circumstellar disk at 150 pc) ELT
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METIS Instrument Baseline Imaging at 3 – 19 μm. with low/medium resolution slit spectroscopy as well as coronagraphy for high contrast imaging. High resolution (R ~ 100,000) IFU spectroscopy at 3 – 5 μm, including extended instantaneous wavelength coverage. Work at the diffraction limit with single conjugate (SC) and eventually assisted by a laser tomography adaptive optics (LTAO) system.
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Instrument Concept Common Fore-Optics AO Wavefront Sensor Imager IFU Spectrograph Warm Calibration Unit as well as Q!
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LM band N band H band (SC)AO Performance D=39m, V=6 guide star, 100 Hz closed loop
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Probing Planet-Forming Disks from 1-1000 m Follette et al. (2015), van der Marel et al. (2013); METIS/MICADO/ALMA Science
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Inner CO Gas vs. Outer Dust Continuum: Pinella et al. (2015); Pontoppidan et al. (2008); METIS/HARMONI Science
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(Multiple) Planet Forming Disks: HD 100546 L-band Scattered Light Spectro-astrometry with CRIRES Avenhaus et al. (2014) Brittain et al. (2014)
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(Multiple) Planet Forming Disks: HD 100546 Not yet detected in K-band ( Quanz et al. 2013; 2015b) and there are other examples…
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Direct Detection (and Characterization) of Circumplanetary Disks Quanz et al. (2015b); METIS/HARMONI/MICADO Science
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Direct Detection of Thermal Emission for Planets of Known Mass with E-ELT: Calibrating the Models RV+Gaia follow-up requires imaging photometry and IFU spectroscopy! Quanz et al. (2015a); METIS/MICADO/HARMONI Science
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Phenomenological Planet Populations: RV Data CA GI Benz et al. (2014); Galvagni & Mayer (2014); Forgan & Rice (2013)
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Direct (Non-) Detections of Gas Giant Planets Few massive planets at large orbital radii. [>3 Mjup @ > 50 AU] dN/da ~ a Lafrenerie et al. (2007); Nielssen & Close (2009); Heinze et al. (2010); Chauvin et al. (2010); Delorme et al. (2011); Vigan et al. (2012); Reggiani et al. (submitted); SPHERE+ERIS NACO-LP: Chauvin et al. (2014) Not good for GI
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DIRECT IMAGING: DISRUPTING PLANET FORMATION THEORY WITH THE E-ELT a.Start with a fit to RV distributions (Cumming et al. 2008) with brown dwarf companions (Reggiani et al. submitted) b.Evidence for dependence of C o, planet frequency over range of mass and orbital radius, on stellar mass (Johnson et al. 2010; Clanton et al. 2014). c.Initial conditions (and theory) suggest dependence on ratio of planet mass to star mass. d.RV/micro-lensing/Imaging consistent with log-normal surface density peaking at 10 AU (Meyer et al. in prep).
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METIS The Survey: 75 G stars < 50 pc < 300 Myr HARMONI Follow-up Required! 10 20 30 40 50 Separation (AU) 10 20 30 40 50 Separation (AU) Log(Jupiter Mass) -0.5 0.0 0.5 1.0 1.5 Log(Jupiter Mass) -0.5 0.0 0.5 1.0 1.5
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High Resolution Spectra of Brown Dwarfs and Planets: METIS/HARMONI Characterization Science Brown dwarf doppler imaging with CRIRES Wind speeds on planets with CRIRES Crossfield et al. (2014) Snellen et al. (2014)
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Star Clusters, Disks, & Planets: E-ELT Opportunities SYNERGIES => Building on legacy of VLT: E-ELT, JWST, and ALMA. => METIS and first-light instruments HARMONI & MICADO. STAR CLUSTERS => Resolved IMFs within 10 Mpc. DISKS => E-ELT will resolve planet-forming disks (gas and dust) inside 10 AU. => Spectro-astrometry: of what are forming planets in disks made? => E-ELT will detect planets in formation (and circumplanetary disks). PLANETS => Direct detection of planets with known mass (constrain models). => Collide planet formation theory with planet populations vs. stellar mass. => Characterize gas giant planets, including phase maps, and weather! => Possible to image (and characterize) a handful of super-earths.
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BACKUP SLIDES
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MMT-AO 6.5m PSF Simulated Trapezium Observations R(Sky Noise) = 1 Rc = 0.2 pc from Close et al. 2003. using Hillenbrand & Carpenter (2000). Hcomp(at Rc) < 24 mag R(sky noise) = 2.5 Rc = 0.5 pc R(Sky Noise) = 4 Rc = 0.8 pc R(Sky Noise) > 20 Rc = 4-5 pc Hcomp(at Rc) < 17.8 mag. Hcomp(at Rc) < 15.3 mags. Core Radius not resolved. 25 kpc50 kpc0.5 Mpc 5 kpc PSF 0.5 kpc Resolved Stellar Pops: HARMONI/MICADO @ Confusion Limit
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Primordial Disk Evolution: A Scenario… Williams & Cieza ARAA (2011); Effects of Photoevaporation? Ercolano et al. (2015) Few AU Volatiles (Ciesla et al; Banzatti et al.)
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Typical Disk Parameters ParameterMedian~1σ Range Log(M(disk)/M(star))[all ~1 Myr] [detected disks only] -3.0 dex -2.3 dex ±1.3 dex ±0.5 dex Disk lifetime2-3 Myr1-6 Myr Temperature power law [T(r)~r -q ]0.60.4-0.7 Taken from (or interpolated/extrapolated from): Muzerolle et al. (2003), Andrews & Williams (2007), Hernandez et al. (2008), Isella et al. (2009) ParameterMedian~1σ Range R(inner)0.1 AU~0.08-0.4 AU R(outer)200 AU~90-480 AU Surface density power [Σ(r) ~ r -p ] [Hayashi min. mass nebula] [steady state viscous α disk] 0.6 1.5 1.0 0.2-1.0 (predicted) Surface density norm. Σ o (5AU) 14 g cm -2 ±1 dex
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Circumplanetary Disk Detection with ALMA (mm grains) From Pineda et al. Cycle 3 Proposal (submitted)
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CA Phenomenology: Planet Masses and Orbits Solid growth time: t p ~ R p r p / [ d x d ] with d ~ M * /a and d ~ sqrt(M * /a 3 ) t p ~ a 5/2 / [M * 3/2 ] cf. gas disk lifetime t d ~ 1/M * Given a outer, there is a timescale t d ~ 1/M * giving R p. a outer ~ [t d M * 3/2 ] 2/5 ~ M * 1/5 Very hard to form critical mass core beyond 10s of AU (all stars). If M p set by disk accretion: M p ~ [dM acc /dt ] t d ~ M * 2 x (1/M * ) ~ M * Planet Mass linearly related to star mass.
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GI Phenomenology: Planet Masses and Orbits Toomre Parameter: Q ~ c s (a) / G (a) with d ~ M * /a, d ~ sqrt(M * /a 3 ), and c s ~ sqrt(T) ~ (M * /a) 1/4 Q ~ 1/ [M * 1/4 a 3/4 ] Depends “weakly” on stellar mass, more strongly on radius. For typical disk parameters, should operate > 50 AU. Typical fragment mass would be ~ c s 4 / (a) ~ 5 M jupiter. Massive planets, beyond 50 AU, independent of stellar mass.
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Companions to Stars: Brown Dwarfs and Planets Reggiani et al. (2011; 2013; 2015); Sahlman et al. (2011)
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Meyer, Reggiani, & Quanz (in preparation) C o ~ M * M p /M * Planet Populations versus Stellar Mass:
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Can ELTs Directly Image Super-Earths? Hinz et al. (2010), Quanz et al. (2015) and the METIS Science Team
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