Phil Armitage

University of Colorado, Boulder

WELCOME! to the web site of Phil Armitage at the University of Colorado in Boulder. My research in theoretical and computational astrophysics focuses on the formation of extrasolar planetary systems and the astrophysics of black holes. Recent work includes predictions for ALMA observations of protoplanetary disks, development of a new model for high energy accretion based on strongly magnetized disks, studies of tidal disruption events, and analytic and simulation studies of planetesimal formation.

MRI accretion disk simulation

Simulation of accretion disk turbulence

At JILA the group of us interested in problems of accretion, planet formation, and high energy astrophysics include myself, Mitch Begelman, Ann-Marie Madigan, Jake Simon, Vladimir Zhdankin, Upasana Das, and Dan Gole.

Beyond work I enjoy hiking, often combined with photography. In addition to landscapes, which are my main focus, I've made trips the last few years to photograph bears in some spectacular spots in Alaska. Like seemingly everyone in Boulder, I'm into running and triathlon too!

Recent papers
Tidal disruption by extreme mass ratio binaries and application to ASASSN-15lh, E.R. Coughlin & P.J. Armitage, MNRAS, submitted

Evidence for universality in the initial planetesimal mass function, J.B. Simon, P.J. Armitage, A.N. Youdin & R. Li, ApJL, submitted

A three-dimensional view of turbulence: Constraints on turbulent motions in the HD 163296 protoplanetary disk using DCO+, K.M. Flaherty, et al., ApJ, in press

Tidal disruption events from supermassive black hole binaries, E.R. Coughlin, P.J. Armitage, C. Nixon & M.C. Begelman, MNRAS, 465, 3840 (2017)

Books, reviews and notes
Physical processes in protoplanetary disks (Armitage, 45th Saas-Fee Advanced Course "From Protoplanetary Disks to Planet Formation")

The dispersal of protoplanetary disks (Alexander et al., Protostars and Planets VI, 2014)

The long-term dynamical evolution of planetary systems (Davies et al., Protostars and Planets VI, 2014)

Dynamics of protoplanetary disks (Armitage, ARA&A, 2011)

Lecture notes on the formation and early evolution of planetary systems, a survey of planet formation theory that forms the basis of my textbook, Astrophysics of planet formation.

astrophysics of planet formation textbook
phil armitage

Phil Armitage

Professor, APS
Fellow, JILA

BA: Physics & Theoretical Physics, Cambridge

Ph.D.: Institute of Astronomy, Cambridge (supervisor Cathie Clarke)


Philip Armitage
University of Colorado, Boulder, CO80309-0440
Tel: 303-492-7836; FAX: 303-492-5235