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Dr. Andrew Youdin, received his Ph.D. from the University of California, Berkeley, in 2003. Dr. Youdin is a theoretical astrophysicist whose primary focus is the formation and evolution of planetary systems. He employs various techniques, including analytic derivations, statistical data analysis and detailed numerical simulations. Current research topics include planetesimal formation, giant planet formation, exoplanet statistics and atmospheres, circumbinary dynamics, and accretion disks. Andrew's work on the streaming instability -- a mechanism to concentrate planet-forming solids in disks -- has transformed the modern understanding of planetesimal formation. In ongoing work, Andrew investigates a range of planet formation mechanisms with an eye to ongoing breakthroughs in exoplanet, disk and Solar System observations.Show Less
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Courses
- SPStars and Planets
- AAAstronomy and Astrophysics
- TATheoretical Astrophysics
- SAStars and Accretion
- OSSOPSOrigin of the Solar System and Other Planetary Systems
Grants
- Alien Earths: Which Nearby Planetary Systems Are Likely to Host Habitable Planets and Life?
Co-Investigator (COI)
2021
$2.8M
Active - Dynamical Instabilities In The Aid of Planet Formation In Circumstellar Disks
Principal Investigator (PI)
2021
$286.5K
Active - Origin of the Giant Planet Dichotomy: Multi-scale Modeling of Planetary Envelope Accretion
Co-Investigator (COI)
2019
$505.7K
Active - Hydrodynamic Processes in Planet-Forming Accretion Disks
Principal Investigator (PI)
2017
$300.9K
- Collaborative Proposal: Pebbles and Gas -The Supply Chain for Compact Planetary Systems
Principal Investigator (PI)
2016
$203.0K
- New Directions in Giant Planet Formation
Principal Investigator (PI)
2015
$327.0K
Publications (96)
Recent
- On the Origin of Dust Structures in Protoplanetary Disks: Constraints from the Rossby Wave Instability
2023
- The 3D Dust and Opacity Distribution of Protoplanets in Multifluid Global Simulations
2022
- Planetesimal formation around the snow line. I. Monte Carlo simulations of silicate dust pile-up in a turbulent disk
2021
- Binary Planetesimal Formation from Gravitationally Collapsing Pebble Clouds
2021
- Thresholds for Particle Clumping by the Streaming Instability
2021
- Dynamical stability of giant planets: the critical adiabatic index in the presence of a solid core
2021
- Global 3D radiation hydrodynamic simulations of proto-Jupiter's convective envelope
2021
- Evolution of MU69 from a binary planetesimal into contact by Kozai-Lidov oscillations and nebular drag
2021
- Planetesimal formation around the snow line. II. Dust or pebbles?
2021
- Dust settling instability in protoplanetary discs
2020
- Superparticle Method for Simulating Collisions
2020
- Turbulence Regulates the Rate of Planetesimal Formation via Gravitational Collapse
2020
- Demographics of Planetesimals Formed by the Streaming Instability
2019
- Trans-Neptunian Binaries as Evidence for Planetesimal Formation by the Streaming Instability
2019
- Theoretical Astrophysics 2020-2030
2019
- Modeling Debris Disk Evolution
2019
- Astro2020 APC White Paper: Theoretical Astrophysics 2020-2030
2019
- Observing Planetary Systems in the Making
2019
- Witnessing Planetary Systems in the Making with the Next Generation Very Large Array
2018
- Homogeneous Analysis of the Dust Morphology of Transition Disks Observed with ALMA: Investigating Dust Trapping and the Origin of the Cavities
2018
- Inside-out Planet Formation. IV. Pebble Evolution and Planet Formation Timescales
2018
- A comprehensive understanding of planet formation is required for assessing planetary habitability and for the search for life
2018
- On the Numerical Robustness of the Streaming Instability: Particle Concentration and Gas Dynamics in Protoplanetary Disks
2018
- The Mass and Size Distribution of Planetesimals Formed by the Streaming Instability. II. The Effect of the Radial Gas Pressure Gradient
2018
- Particle Trapping in Protoplanetary Disks: Models vs. Observations
2017
- Planetesimal Formation: Evidence for a Universal Initial Size Distribution
2017
- Planetesimal Formation in Protoplanetary Disks
2017
- Evidence for Universality in the Initial Planetesimal Mass Function
2017
- Insights into the Streaming Instability in Protoplanetary Disks
2017
- A Thermodynamic View of Dusty Protoplanetary Disks
2017
- The Mass and Size Distribution of Planetesimals Formed by the Streaming Instability. I. The Role of Self-gravity
2016
- The role of non-ionizing radiation pressure in star formation: the stability of cores and filaments
2016
- {Vertical Shear Instability in the Solar Nebula}
2016
- From Dust Grains to Planetesimals: The Importance of the Streaming Instability in Protoplanetary Disks
2016
- Cooling Requirements for the Vertical Shear Instability in Protoplanetary Disks
2015
- {The Initial Mass and Size Distribution of Planetesimals. I. The Effect of Resolution, Gravity, and Initial Conditions in Streaming Instability Calculations}
2015
- The Physics of Planetesimal Formation
2015
- {Planetesimals in Debris Disks}
2015
- Minimum Core Masses for Giant Planet Formation with Realistic Equations of State and Opacities
2015
- Structure and Evolution of Internally Heated Hot Jupiters
2015
- Circumbinary Planetary Systems at Home and Abroad
2014
- Hot Jupiter Radii: A Turbulent History
2014
- New Directions in Giant Planet Formation
2014
- Effects of Magnetism on the Atmospheres and Evolution of Hot Jupiters
2014
- On the Minimum Core Mass for Giant Planet Formation at Wide Separations
2014
- M dwarf stars in the light of (future) exoplanet searches
2013
- On the Minimum Core Mass for Giant Planet Formation
2013
- From Disks to Planets
2013
- Circumbinary Chaos: Using Pluto's Newest Moon to Constrain the Masses of Nix and Hydra
2012
- From pebbles to planets
2012
- Adding particle collisions to the formation of asteroids and Kuiper belt objects via streaming instabilities
2012
- On the Formation of Planetesimals Via Secular Gravitational Instabilities with Turbulent Stirring
2011
- The Exoplanet Census: A General Method Applied to Kepler
2011
- Roadmap For Small Bodies Exploration: Theoretical Studies
2011
- Testing Planet Formation Theory with Exoplanets
2011
- Core Accretion at Wide Separations: The Critical Role of Gas
2011
- Rapid Accretion of Large Planetesimals by Gravitational Instabilities
2011
- From Grains to Planetesimals
2010
- Planetesimal Formation
2010
- The Mechanical Greenhouse: Burial of Heat by Turbulence in Hot Jupiter Atmospheres
2010
- The Mechanical Greenhouse: How Stably Stratified Turbulence Heats Hot Jupiters
2010
- Starting Small in Planet Formation
2010
- Forming Planetesimals in Solar and Extrasolar Nebulae
2010
- Planet Formation in Magnetized Accretion Disks
2010
- The Runts of the Litter: Why Planets Formed Through Gravitational Instability Can Only Be Failed Binary Stars
2010
- Formation of Kuiper Belt Binaries by Gravitational Collapse
2010
- Large-scale Density Structures in Magneto-rotational Disk Turbulence
2009
- How High Metallicity Can Trigger Planet Formation
2009
- Zonal Flows and Long-lived Axisymmetric Pressure Bumps in Magnetorotational Turbulence
2009
- Particle Clumping and Planetesimal Formation Depend Strongly on Metallicity
2009
- Planet Formation at Wide Separations: Constraints from HR 8799
2009
- Planetesimal Formation: Theory vs. Simulation
2008
- Planetesimal Formation with Particle Feedback
2008
- Protoplanetary Disk Turbulence Driven by the Streaming Instability: Linear Evolution and Numerical Methods
2007
- Supplementary Information for ``Rapid planetesimal formation in turbulent circumstellar discs''
2007
- Rapid planetesimal formation in turbulent circumstellar disks
2007
- Protoplanetary Disk Turbulence Driven by the Streaming Instability: Nonlinear Saturation and Particle Concentration
2007
- Particle stirring in turbulent gas disks: Including orbital oscillations
2007
- Particle-Laden Turbulence from the Streaming Instability
2006
- A Disk Origin for S-Stars in the Galactic Center?
2005
- Planetesimal Formation without Thresholds. II: Gravitational Instability of Solids in Turbulent Protoplanetary Disks
2005
- Planetesimal Formation without Thresholds. I: Dissipative Gravitational Instabilities and Particle Stirring by Turbulence
2005
- Formation of Planetesimals by Dissipative Gravitational Instabilities
2005
- Streaming Instabilities in Protoplanetary Disks
2005
- Planetesimal Formation by Dissipative Gravitational Instability
2005
- Particle Pileups and Planetesimal Formation
2004
- Grain Growth and Formation of Chrondrules
2004
- Two Fluid Drag Instabilities in Protoplanetary Disks
2004
- From Dust to Planetesimals
2004
- Planetesimal Formation by Gravitational Instability - The Goldreich-Ward Hypothesis Revisited
2004
- Obstacles to the Collisional Growth of Planetesimals
2004
- The Epoch of Planetesimal Formation
2003
- The formation of planetesimals
2003
- Particle Pile-ups and Planetesimal Formation
2003
- Planetesimal Formation by Gravitational Instability
2002
- Limits on Spin-Mass Couplings within the Axion Window
1996