Andrew Youdin

Interests

Research

planet formation, protoplanetary disks, astrophysical fluid dynamics (and MHD), exoplanets (statistics, dynamics and atmospheres), Kuiper Belt objects

Teaching

dynamics, hydrodynamics, exoplanets, planet formation, disks, stellar structure and evolution, numerical methods, general astronomy

Courses

Scholarly Contributions

Chapters

• Pinilla, P., & Youdin, A. (2017). Particle Trapping in Protoplanetary Disks: Models vs. Observations. In Astrophysics and Space Science Library.

Journals/Publications

• Hyodo, R., Guillot, T., Ida, S., Okuzumi, S., & Youdin, A. N. (2021). "Planetesimal formation around the snow line. II. Dust or pebbles?". aap, 646, A14. doi:10.1051/0004-6361/202039894
• Ida, S., Guillot, T., Hyodo, R., Okuzumi, S., & Youdin, A. N. (2021). "Planetesimal formation around the snow line. I. Monte Carlo simulations of silicate dust pile-up in a turbulent disk". aap, 646, A13.
• Kundu, S. K., Coughlin, E. R., Youdin, A. N., & Armitage, P. J. (2021). "Dynamical stability of giant planets: the critical adiabatic index in the presence of a solid core". mnras, 507(4), 6215-6224.
• Li, R., & Youdin, A. N. (2021). "Thresholds for Particle Clumping by the Streaming Instability". apj, 919(2), 107.
• Lyra, W., Youdin, A., & Johansen, A. (2021). "Evolution of MU69 from a binary planetesimal into contact by Kozai-Lidov oscillations and nebular drag". icarus, 356, 113831. doi:10.1016/j.icarus.2020.113831
• Nesvorn{'y}, D., Li, R., Simon, J. B., Youdin, A. N., Richardson, D. C., Marschall, R., & Grundy, W. M. (2021). "Binary Planetesimal Formation from Gravitationally Collapsing Pebble Clouds". The Planetary Science Journal, 2(1), 27. doi:10.3847/PSJ/abd858
• Zhu, Z., Jiang, Y., Baehr, H., Youdin, A. N., Armitage, P. J., & Martin, R. G. (2021). "Global 3D radiation hydrodynamic simulations of proto-Jupiter's convective envelope". mnras, 508(1), 453-474.
• Abod, C. P., Simon, J. B., Li, R., Armitage, P. J., Youdin, A. N., & Kretke, K. A. (2018). The Mass and Size Distribution of Planetesimals Formed by the Streaming Instability. II. The Effect of the Radial Gas Pressure Gradient. submitted to AAS journals, arXiv:1810.10018.
• Gole, D. A., Simon, J. B., Li, R., Youdin, A. N., & Armitage, P. J. (2020). "Turbulence Regulates the Rate of Planetesimal Formation via Gravitational Collapse". apj, 904(2), 132.
• Krapp, L., Youdin, A. N., Kratter, K. M., & Ben{'itez-Llambay}, P. (2020). "Dust settling instability in protoplanetary discs". mnras, 497(3), 2715-2729.
• Nesvorn{'y}, D., Youdin, A. N., Marschall, R., & Richardson, D. C. (2020). "Superparticle Method for Simulating Collisions". apj, 895(1), 63.
• Abod, C. P., Simon, J. B., Li, R., Armitage, P. J., Youdin, A. N., & Kretke, K. A. (2019). The Mass and Size Distribution of Planetesimals Formed by the Streaming Instability. II. The Effect of the Radial Gas Pressure Gradient. apj, 883(2), 192.
• Gaspar, A., Apai, D., Augereau, J., Ballering, N. P., Beichman, C. A., Boccaletti, A., Booth, M., Bowler, B. P., Bryden, G., Chen, C. H., Currie, T., Danchi, W. C., Debes, J., Defr{`ere}, D., Ertel, S., Jackson, A. P., Kalas, P. G., Kennedy, G. M., Kenworthy, M. A., , Kim, J. S., et al. (2019). Modeling Debris Disk Evolution. baas, 51(3), 69.
• Isella, A., Ricci, L., Andrews, S., Baruteau, C., Berger, J., Bergin, E., Birnstiel, T., Bowler, B., Brogan, C., Carrasco, G. C., Chandler, C., Currie, T., Cuzzi, J., D'Angelo, G., Dong, R., Duchene, G., Dutrey, A., Ercolano, B., Espaillat, C., , Estrada, P., et al. (2019). Observing Planetary Systems in the Making. baas, 51(3), 174.
• Kollmeier, J. A., Anderson, L., Benson, A., Bogdanovic, T., Boylan-Kolchin, M., Bullock, J. S., Dave, R., Fraschetti, F., Fuller, J., Hopkins, P. F., Kaplinghat, M., Kratter, K., Lamberts, A., Miller, M. C., Owen, J. E., Phinney, E. S., Piro, A. L., Rix, H., Robertson, B., , Wetzel, A., et al. (2019). Astro2020 APC White Paper: Theoretical Astrophysics 2020-2030. arXiv e-prints, arXiv:1912.09992.
• Kollmeier, J., Anderson, L., Benson, A., Bogdanovi{'c}, T., Boylan-Kolchin, M., Bullock, J. S., Dav{'e}, R., Fuller, J., Hopkins, P., Kaplinghat, M., Kratter, K., Miller, M. C., Owen, J. E., Phinney, E. S., Piro, A. L., Rix, H., Robertson, B., Wheeler, C., Wetzel, A., , Youdin, A. N., et al. (2019). Theoretical Astrophysics 2020-2030. baas, 51.
• Li, R., Youdin, A. N., & Simon, J. B. (2019). Demographics of Planetesimals Formed by the Streaming Instability. apj, 885(1), 69.
• Nesvorn{'y}, D., Li, R., Youdin, A. N., Simon, J. B., & Grundy, W. M. (2019). Trans-Neptunian binaries as evidence for planetesimal formation by the streaming instability. Nature Astronomy, 3, 808-812.
• Nesvorn{\'y}, D., Li, R., Youdin, A. N., Simon, J. B., & Grundy, W. M. (2019). Trans-Neptunian Binaries as Evidence for Planetesimal Formation by the Streaming Instability. Nature Astronomy, 3, 808-812. doi:10.1038/s41550-019-0806-z
• Hu, X., Tan, J. C., Zhu, Z., Chatterjee, S., Birnstiel, T., Youdin, A. N., & Mohanty, S. (2018). Inside-out Planet Formation. IV. Pebble Evolution and Planet Formation Timescales. \apj, 857, 20.
• Li, R., Youdin, A. N., & Simon, J. B. (2018). On the Numerical Robustness of the Streaming Instability: Particle Concentration and Gas Dynamics in Protoplanetary Disks. \apj, 862, 14.
• Pinilla, P., Tazzari, M., Pascucci, I., Youdin, A., Garufi, A., Manara, C., Testi, L., Plas, G., Barenfeld, S., Canovas, H., Cox, E., Hendler, N., P{\'erez}, L., & Marel, N. (2018). Homogeneous Analysis of the Dust Morphology of Transition Disks Observed with ALMA: Investigating Dust Trapping and the Origin of the Cavities. \apj, 859, 32.
• Komacek, T., & Youdin, A. (2017). Structure and Evolution of Internally Heated Hot Jupiters. \apj, 844, 94.
• Lin, M., & Youdin, A. (2017). A Thermodynamic View of Dusty Protoplanetary Disks. \apj, 849, 129.
• Simon, J., Armitage, P., Youdin, A., & Li, R. (2017). Evidence for Universality in the Initial Planetesimal Mass Function. \apjl, 847, L12.
• Seo, Y., & Youdin, A. (2016). "The role of non-ionizing radiation pressure in star formation: the stability of cores and filaments". mnras, 461, 1088-1099.
• Simon, J., Armitage, P., Li, R., & Youdin, A. (2016). "The Mass and Size Distribution of Planetesimals Formed by the Streaming Instability. I. The Role of Self-gravity". apj, 822, 55.
• {Lin}, M., , A. (2015). "{Cooling Requirements for the Vertical Shear Instability in Protoplanetary Disks}". apj, 811, 17.
• {Piso}, A., {Youdin}, A., , R. (2015). "{Minimum Core Masses for Giant Planet Formation with Realistic Equations of State and Opacities}". apj, 800, 82.
• {Simon}, J., {Armitage}, P., {Li}, R., , A. (2015). "{The Initial Mass and Size Distribution of Planetesimals. I. The Effect of Resolution, Gravity, and Initial Conditions in Streaming Instability Calculations}". ArXiv e-prints.
• {Youdin}, A., , G. (2015). "{Planetesimals in Debris Disks}". ArXiv e-prints.
• Piso, A., & Youdin, A. N. (2014). On the Minimum Core Mass for Giant Planet Formation at Wide Separations. apj, 786, 21.
• Piso, A., Youdin, A. N., & Murray-Clay, R. A. (2015). Minimum Core Masses for Giant Planet Formation with Realistic Equations of State and Opacities. apj, 800, 82.
• Rojas-Ayala, B., Hilton, E. J., Mann, A. W., L 'epine, S., Gaidos, E., Bonfils, X., Helling, C., Henry, T. J., Rogers, L. A., Braun, K., & Youdin, A. (2013). M dwarf stars in the light of (future) exoplanet searches. Astronomische Nachrichten, 334, 155.
• Johansen, A., Youdin, A. N., & Lithwick, Y. (2012). Adding particle collisions to the formation of asteroids and Kuiper belt objects via streaming instabilities. aap, 537, A125.
• Youdin, A. N., Kratter, K. M., & Kenyon, S. J. (2012). Circumbinary Chaos: Using Pluto's Newest Moon to Constrain the Masses of Nix and Hydra. apj, 755, 17.

Proceedings Publications

• Lyra, W., Johansen, A., & Youdin, A. (2021, jan). "Evolution of MU69 from a binary planetesimal into contact by Kozai-Lidov oscillations and nebular drag". In 43rd COSPAR Scientific Assembly. Held 28 January - 4 February, 43.
• Youdin, A. (2019, jun). The Formation of Planetesimals. In AAS/Division of Dynamical Astronomy Meeting, 51.
• {Lin}, M., , A. (2016, jan). "{Vertical Shear Instability in the Solar Nebula}". In IAU Symposium, 314.
• {Simon}, J., {Armitage}, P., {Youdin}, A., , R. (2016, jan). "{From Dust Grains to Planetesimals: The Importance of the Streaming Instability in Protoplanetary Disks}". In American Astronomical Society Meeting Abstracts, 227.
• {Komacek}, T., , A. (2015, nov). "{Structure and Evolution of Internally Heated Hot Jupiters}". In AAS/Division for Planetary Sciences Meeting Abstracts, 47.
• {Simon}, J., {Armitage}, P., {Youdin}, A., , R. (2015, dec). "{The Physics of Planetesimal Formation}". In AAS/Division for Extreme Solar Systems Abstracts, 3.
• Komacek, T. D., Rogers, T. M., Barman, T. S., Showman, A. P., & Youdin, A. N. (2014, nov). Effects of Magnetism on the Atmospheres and Evolution of Hot Jupiters. In AAS/Division for Planetary Sciences Meeting Abstracts, 46, #101.04.
• Kratter, K. M., Shannon, A. B., Youdin, A., & Kenyon, S. (2014, may). Circumbinary Planetary Systems at Home and Abroad. In AAS/Division of Dynamical Astronomy Meeting, 45, #200.01.
• Youdin, A. N., & Komacek, T. D. (2014, nov). Hot Jupiter Radii: A Turbulent History. In AAS/Division for Planetary Sciences Meeting Abstracts, 46, #210.08.
• Piso, A., Youdin, A., & Murray-Clay, R. (2013, jul). On the Minimum Core Mass for Giant Planet Formation. In Protostars and Planets VI Posters, 30.
• Youdin, A., & Piso, A. (2013, oct). On the Minimum Core Mass for Giant Planet Formation. In AAS/Division for Planetary Sciences Meeting Abstracts, 45, #510.02.
• Johansen, A., Youdin, A. N., & Lithwick, Y. (2012, mar). From pebbles to planets. In From Atoms to Pebbles: Herschel's view of Star and Planet Formation.

Presentations

• Youdin, A. (2019, Jan). The Formation of Binary Planetesimals. CITA Seminaor. Toronto.
• Youdin, A. (2019, July). The Formation of Binary Planetesimals. Astrophysical Dynamics. Shanghai: TD Lee Institute.
• Youdin, A. (2019, June). In Memory of Bill Ward: The Formation of Planetsimals. AAS DDA divisional meeting, special invited section to honor the life and work of Bill Ward. Boulder, CO.
• Youdin, A. (2018, August). Planet Formation in the ALMA Era. Chalmers University Colloquium. Gothenburg, Sweden.
• Youdin, A. (2018, July). Planet Formation in the ALMA Era. Unsolved Problems in Astrophysics. Budapest, Hungary.
• Youdin, A. (2018, June). Hot Start vs. Cold Start. Where are the Planets. Madrid, Spain.
• Youdin, A. (2018, March). Conference Summary. Stars and Planet Formation 2. Oracle, AZ.
• Youdin, A. (2018, Sept). Binary KBOs: Insights into Planetesimal Formation. JHU Astrophysics Seminar. Baltimore, Maryland.
• Youdin, A. (2018, Sept). Planet Formation in the ALMA Era. Capital Area Disk Workshop. Baltimore, MD.
• Youdin, A. (2014, Feb). The Origin of Solar and Extrasolar Planetesimals. Steward Colloquium.
• Youdin, A. (2014, June). Discussions on Comets. Invited Talk at MPS Goettingen.
• Youdin, A. (2014, June). Forming Giant Planets on Wide Orbits: The Viability of Core Accretion. Lund University Seminar.
• Youdin, A. (2014, June). Towards a Unified Model of Planet Formation: A Focus on Unsolved Problems. Unsolved Problems in Astrophysics Conference. Budapest.
• Youdin, A. (2014, May). Forming Giant Planets on Wide Orbits: The Viability of Core Accretion. Berkeley CIPS Seminar.
• Youdin, A. (2014, May). Kickstarting Planet Formation: The Rapid Formation of Large Planetesimals. Berkeley Colloquium.
• Youdin, A. (2014, October). Unsolved Problems in Planetesimal Formation. Invited Talk at MIRA Conference, UMichigan.

Reviews

• Pinilla, P., & Youdin, A. N. (2017. Particle Trapping in Protoplanetary Disks: Models vs. Observations(p. 48).