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WELCOME! to the web site of Phil Armitage at the University
of Colorado in Boulder, where I am an
Associate Professor in the Department of
Astrophysical and Planetary Sciences
and a Fellow at JILA.
My research focuses on the formation
and early evolution of extrasolar planetary systems, and the astrophysics
of black holes. I am on sabbatical during the 2009-2010 academic year, but
my normal teaching includes a range of primarily upper division undergraduate and graduate classes.
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| RESEARCH INTERESTS
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RECENT PAPERS (LAST 12 MONTHS)
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Planet formation and protoplanetary disk evolution
Theoretical studies of the evolution of protoplanetary disks, the
formation of massive planets, and the dynamics of extrasolar planetary
systems. Recent work has included simulations of self-gravitating
protoplanetary disks, and dynamical studies of the possible
coupling between massive and terrestrial planet formation.
Accretion disk theory
Theoretical and computational studies aimed at elucidating the
basic physics of accretion flows, and developing links with observational
diagnostics of accretion in AGN and GRBs. Ongoing work is exploring
the formation of stars near the Galactic Center, the formation of
supermassive black holes at high redshift, and the role of gas in
binary black hole mergers.
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Time-dependent models of the structure and evolution
of self-gravitating protoplanetary discs,
W.K.M. Rice, & P.J. Armitage, MNRAS, in press
Planet-planet scattering in planetesimal disks,
S.N. Raymond, P.J. Armitage, & N. Gorelick, ApJ, 699, L88 (2009)
Planet-planet scattering leads to tightly packed planetary systems,
S.N. Raymond, R. Barnes, D. Veras, P.J. Armitage, N. Gorelick, & R. Greenberg, ApJ, 696, L98 (2009)
Massive black hole binary mergers within sub-pc scale gas discs,
J. Cuadra, P.J. Armitage, R.D. Alexander & M.C. Begelman, MNRAS, 393, 1423 (2009)
Extrasolar planet
eccentricities from scattering in the presence of residual gas disks,
N. Moeckel, S.N. Raymond & P.J. Armitage, ApJ, 688, 1361 (2008)
Microphysical dissipation,
turbulence and magnetic fields in hyper-accreting discs,
E.M. Rossi, P.J. Armitage & K. Menou, MNRAS, 391, 922 (2008)
Mean motion resonances from planet-planet scattering,
S.N. Raymond, R. Barnes, P.J. Armitage, & N. Gorelick, ApJ, 687, L107 (2008)
Binary formation and mass function
variations in fragmenting discs with short cooling times, R.D. Alexander,
P.J. Armitage & J. Cuadra, MNRAS, 389, 1655 (2008)
Interaction of the magnetorotational instability with hydrodynamic
turbulence in accretion disks, J.C. Workman & P.J. Armitage, ApJ, 685, 406 (2008)
Stellar dynamical evidence against a cold disc origin for
stars in the Galactic Centre, J. Cuadra, P.J. Armitage & R.D. Alexander, MNRAS, 388, L64 (2008)
Quasistars: Accreting
black holes inside massive envelopes, M.C. Begelman, E.M. Rossi &
P.J. Armitage, MNRAS, 387, 1649 (2008)
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| STUDENTS & POSTDOCS
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TALKS & PUBLICATIONS
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I am currently working with University of Colorado graduate students
Jared Workman and Anna Hughes, and with postdoctoral fellow Sean Raymond.
Past members of my group include former student Dimitri Veras (now a postdoc
at the University of Florida), and postdoc Ken Rice (now on the faculty at
the University of Edinburgh). Other collaborators include former Colorado
postdocs Richard Alexander (Leiden), Daniel Proga (UNLV), Jorge Cuadra (MPA) and
Elena Rossi (Racah Institute).
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A complete
list of my published papers is available via the ADS database. Recent
review articles include:
Lecture notes on the formation and early evolution of planetary systems
Stars in the making (commentary for Science)
My graduate level textbook Astrophysics of
Planet Formation is scheduled for publication by Cambridge University Press in November 2009.
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| TEACHING
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EXTRASOLAR PLANETS
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ASTR 1120: General Astronomy (Spring 2005)
ASTR 3300: Extraterrestrial Life (Spring 2008)
ASTR 3730: Astrophysics 1 (Fall 2007)
ASTR 3830: Astrophysics 2 (Spring 2007)
ASTR 5110: Internal Processes 1 (Fall 2005)
ASTR 5120: Radiative and Dynamical Processes (Spring 2009)
ASTR 5700: Stellar Structure and Evolution (Fall 2002)
ASTR 5820: Solar System Dynamics and Origins (Fall 2008)
ASTR 6000: Disks around Stars (Fall 2002 graduate seminar)
ASTR 6000: Gamma-ray bursts (Fall 2004 graduate seminar)
ASTR 6000: Black Hole Formation (Spring 2007 graduate seminar)
ASTR 6000: Galactic Center (Spring 2008 graduate seminar)
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Plots of the orbital parameters of currently known
extrasolar planets.
Planet Formation and Migration - a popular
article I curate for Scholarpedia.
NEW! Presentations on "Planet Formation" given as part of the XIII Ciclo de Cursos Especiais (a summer
school for South American graduate students)
at the Observatório Nacional, Rio de Janeiro in 2008:
Lecture 1: Observations of planetary systems
Lecture 2: Protoplanetary disks
Lecture 3: Planetesimal formation
Lecture 4: Formation of terrestrial and giant planets
Lecture 5: Evolution and stability of planetary systems
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| MOVIES
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FUN STUFF
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Animations from numerical simulations of
black hole accretion and
planet migration.
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I maintain a separate web site of landscape photography,
mostly from the National Parks and wilderness areas of North America.
Of course there's always a list of web links too.
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Phil Armitage (pja@jilau1.colorado.edu)
JILA, Campus Box 440
University of Colorado
Boulder CO80309-0440
USA
Tel: 303-492-7836 or FAX: 303-492-5235
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