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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. My teaching includes a variety of undergraduate and graduate classes -
in the Fall I am teaching Origins of Planetary Systems.
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| RESEARCH INTERESTS
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RECENT PAPERS
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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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Mean motion resonances from planet-planet scattering,
S.N. Raymond, R. Barnes, P.J. Armitage, & N. Gorelick, ApJ Letters, in press
Massive black hole binary mergers within sub-pc scale gas discs,
J. Cuadra, P.J. Armitage, R.D. Alexander & M.C. Begelman, MNRAS, submitted
Extrasolar planet
eccentricities from scattering in the presence of residual gas disks,
N. Moeckel, S.N. Raymond & P.J. Armitage, ApJ, in press
Microphysical dissipation,
turbulence and magnetic fields in hyper-accreting discs,
E.M. Rossi, P.J. Armitage & K. Menou, MNRAS, in press
Eccentricity of masing disks in Active Galactic Nuclei,
P.J. Armitage, ApJ, submitted
Binary formation and mass function
variations in fragmenting discs with short cooling times, R.D. Alexander,
P.J. Armitage & J. Cuadra, MNRAS, in press
Interaction of the magnetorotational instability with hydrodynamic
turbulence in accretion disks, J.C. Workman & P.J. Armitage, ApJ, in press
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)
Self-gravitating fragmentation
of eccentric accretion disks , R.D. Alexander, P.J. Armitage,
J. Cuadra & M.C. Begelman, ApJ, 674, 927 (2008)
Why are there
so few hot Jupiters?, W.K.M. Rice, P.J. Armitage &
D.F. Hogg, MNRAS, 384, 1282 (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 fellows Jorge Cuadra,
Sean Raymond and Elena Rossi.
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) and Daniel Proga (UNLV).
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A full
list of my published papers, along with some conference proceedings, is available via the ADS database. Recent
talks and review articles include:
Theory of disk accretion onto supermassive black holes
Lecture notes on the formation and early evolution of planetary systems
Disk fragmentation and star formation in the Galactic Center
Stars in the making (commentary for Science)
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| MOVIES
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EXTRASOLAR PLANETS
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Animations from numerical simulations of
black hole accretion and
planet migration.
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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.
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| TEACHING
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FUN STUFF
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ASTR 3300: Extraterrestrial Life (Spring 2008)
ASTR 6000: Galactic Center (Spring 2008 graduate seminar)
ASTR 1120: General Astronomy (Spring 2005)
ASTR 3730: Astrophysics 1 (Fall 2007)
ASTR 3830: Astrophysics 2 (Spring 2007)
ASTR 5700: Stellar Structure and Evolution (Fall 2002)
ASTR 5110: Internal Processes 1 (Fall 2005)
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)
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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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