Department of Physics

School of Natural Sciences and Mathematics

Mustapha Ishak-Boushaki
Associate Professor
ECN 2.918
972-883-2815

Faculty Profile

Mustapha Ishak-Boushaki, Ph.D., Associate Professor

Education

B.A.Sc. in Computer Sciences at U.Q.A.Montreal, Canada.
B.Sc. in Physics at University of Montreal, Canada.
Ph.D. in Cosmology and General Relativity at Queen's University at Kingston, Canada.
Research Associate in Cosmology at Princeton University, New Jersey, USA


"It's all about quality of life and finding a happy balance between work and friends and family." Philip Green.

This webpage was updated on November 2011. It will be updated soon with recent papers, students and news.

For my Curriculum Vitae (CV) (to be updated) click here.
For a picture of the new addition to the ishak's family: Ryan click here.
For a picture gallery of my little family click here.
For a picture of my students and research group click here.

Overview

I completed my Ph.D. (December 2002) in Cosmology and General Relativity with Prof. Kayll Lake at the Physics Department at Queen's University at Kingston in Canada. My graduate work included investigations in inhomogeneous cosmological models; an inverse approach to Einstein's equations; oscillation modes in compact astrophysical objects; and matching spacetimes using junction conditions.

Then, I joined the Physics Department at Princeton University as a postdoctoral fellow where I worked on projects in cosmology, cosmic acceleration and gravitational lensing with Prof. Steinhardt, Prof. Seljak and other researchers. After that, I worked as a Research Associate at the Astrophysical Sciences Department at Princeton in collaboration with Prof. Spergel and other researchers on the same topics above. While there, I organized the Princeton & IAS Gravitational Lensing Seminar and taught at both the Astrophysics Department (Astro 203) and at the Physics Department (Physics 103).

On August 2005, I started an assistant professor position at the Department of Physics at the University of Texas at Dallas (UT Dallas). I discovered that a real thirst for Cosmology and Astrophysics exists within the students at UT Dallas and also the general public in the Dallas Metroplex Area so I launched, with the help of colleagues, a number of initiatives and activities in response to that. I formed the new Cosmology, Relativity, and Astrophysics Group with the kind encouragments of Prof. Rindler and other coleagues here at UT Dallas.

My recent research projects and interests at UTDallas are in Modern Cosmology, General Relativity, and at their  intersection (see next section).  I am involved in both theoretical, numerical, and data-related projects. For a partial list of my papers at Los Almos Archive click here (astro-ph), click here (gr-qc), For a partial list of my papers at NASA ADS click here.

I very much enjoy teaching and supervising students. The courses I taught at UTD include PHYS2325 Mechanics, PHYS3312 Classical Mechanics, and PHYS5395 Cosmology. I received the 2007 Outstanding Teaching Award from the School of Natural Sciences and Mathematics at UTD .

Our group is now funded by NASA, DOE, and NSF, as well as the private sector.

Doctoral Genealogy:

Kayll W. Lake - Robert C. Roeder - George C. McVittie - Arthur S. Eddington
(Credit for reconstructing this genealogy goes to Prof. Kayll Lake)

Professional recognitions and honors

Journal Paper voted by the Editorial Board of Classical and Quantum Gravity Journal as one of the journal's highlights of 2002. Article title: Interactive Geometric Database, Including Exact Solutions of Einstein's Field Equations, Mustapha Ishak and Kayll Lake, Classical and Quantum Gravity 19, 505 (2002).

2002-2004 Postdoctoral Fellowship for Excellence in Research and Leadership from the Natural Sciences and Engineering Research Council of Canada (NSERC)

Journal paper selected on June 2008 by Gerardus 't Hooft (Nobel Laureate in Physics 1999) on the Chief Editor List of the Foundation of Physics Journal. Article title: Remarks on the formulation of the cosmological constant/dark energy questions. Mustapha Ishak. Foundation of ihysics Journal, 37:1470-1498,2007.

2007 Award for Outstanding Teacher of the Year from the School of Natural Sciences and Mathematics. University of Texas at Dallas

My current and previous students include:

Graduated Ph.D. Students:
James Richardson (graduated in 2008). Working in the corporate sector.
Jacob Moldenhaeur (graduated in 2010). Assistant Professor at Francis Marion University in SC.

Current graduate students (in alphabetical order):
Chris Allison (Ph.D. graduation TBD)
Jason Dossett (Ph.D. graduation planned for 2013)
Anthony Nwankwo (Ph.D. graduation planned for December 2011)
Austin Peel (Ph.D. graduation year TBD)
Michael Troxel (Ph.D. graduation year 2014)
Tharake Wijenayake (Ph.D. graduation year TBD)

Other students involved with the group
Lee Caps
Jeffrey Scott
Brian Troup

Undergraduate student supervision:
Katherine Morgan (undergraduate Thesis/research, 2006)
Lee Isaac Trawick, (undergraduate Thesis/research, 2006)
Wendy Gartenberg, (undergraduate Thesis/research, 2007)
John Wilson (undergraduate Thesis/research, 2007)
Jason Dossett, (undergraduate Thesis/research, 2007 and 2008)
Tan Lee, (undergraduate Thesis/research, 2008)
Austin Peel (undergraduate Thesis/research, 2007)
John Thompson (Undergraduate Thesis/Research, 2008)

High-school students summer internships:
Tim Carlton summer 2006
Ray Whitside, summer 2007
Sid Mittal, summer 2008
Parker Maginley, summer 2008
Brandyn Lee, summer 2009
Scott Meesse, summer 2009
Genway Huang, summer 2010
Evan Remmele, summer 2011

Grants

PI, National Science Foundation, to start in 2011 (Research Project in Astrophysics and Gravitational Lensing)
PI, Department Of Energy, to start in 2010 (Research Project in Cosmology and Dark Energy)
PI, NASA Astrophysics Theory Program, to start in 2009 (Research Project in Cosmology and Cosmic Acceleration)
PI, Texas Space Grant Consortium, to start in 2008 (Research Project in Astrophysics and Cosmic Acceleration)
PI, From Corporate Sector Frito-Lay, 2008 (Research Project I in Gravity & statistics)
PI, From Corporate Sector Frito-Lay, 2009 (Research Project II in Gravity & statistics)
PI, Hoblitzelle foundation, 2006 (Grant to build a Computer Cluster)

Research Interests

For a longer list, see the Astrophysics, Cosmology, and Relativity Group home page.

  • Gravitational Lensing and applications to cosmology
  • The Acceleration of the expansion of the Universe: Cosmological Constant, Dark Energy, ...
  • Constraining cosmological parameters and cosmological models using probes such as gravitational lensing, the cosmic microwave background (CMB), and supernova searches.
  • General Relativity and Cosmological Exact Solutions to Einstein's Equations
  • Higher dimensional cosmological models
  • Projects at the intersection of modern cosmology and General Relativity
  • Junction conditions for matching space-times and constructing wormholes and spacetime thin-shells
  • Computer Algebra (symbolic computing) and application to cosmology and general relativity

Cosmology, Relativity and Astrophysics Group

Cosmology student group

Cosmology student group
From right to left: Prof. Mustapha Ishak-Boushaki, Michael Troxel, Jacob Moldenhauer, John Thompson, Jason Dossett, Anthony Nwankwo, Lee Caps, and Prof. Wolgang Rindler (Chris Allison and Austin Peel are not shown on picture).


Publications, talks, presentations, colloquia, workshops, collaborations, and software:

Journal Papers (incomplete list):

  1. " The growth of structure in the Szekeres inhomogeneous cosmological models and the matter-dominated era ", Mustapha Ishak, Austin Peel. Submitted to JCAP (2011). Paper available at astro-ph:arXiv:1104.2590.

  2. " Figures of merit and constraints from testing General Relativity using the latest cosmological data sets including refined COSMOS 3D weak lensing ", Jason Dossett, Jacob Moldenhauer, Mustapha Ishak. Published in Physical Review D 84, 023012 (2011). Paper available at astro-ph:arXiv:1006.0014.

  3. " The Relevance of the Cosmological Constant for Lensing ", Mustapha Ishak, Wolfgang Rindler, Jason Dossett. Invited Review Article Published in General Relativity and Gravitation 42: 2247-2268 (2010). Paper available at astro-ph:arXiv:1006.0014.

  4. " Luminosity distance and redshift in the Szekeres inhomogeneous cosmological models ", Anthony Nwankwo, Mustapha Ishak, John Thompson. Published in JCAP JCAP (2011). Paper available at astro-ph:arXiv:1006.0014.

  5. " Constraints on growth index parameters from current and future observations ", Jason Dossett, Mustapha Ishak, Jacob Moldenhauer, Yungui Gong, Anzhong Wang. Published in JCAP 1004:022 (2010). Paper available at astro-ph:arXiv:1004.3086.

  6. " Supernova, baryon acoustic oscillations, and CMB surface distance constraints on f(G) higher order gravity models ", Jacob Moldenhauer, Mustapha Ishak, John Thompson, Damien A. Easson. Published in Physical Review D 81, 063514 (2010). Paper available at astro-ph:arXiv:1004.2459.

  7. " A minimal set of invariants as a systematic approach to higher order gravity models II: Physical and Cosmological Constraints" Jacob Moldenhauer, Mustapha Ishak.. Published in Journal of Cosmology and Astroparticle Physics 0912: 020 (2009). Paper available at astro-ph:arXiv:0912.5332.

  8. " Growth factor parametrization in curved space", Yungui Gong, Mustapha Ishak, Anzhong Wang Published in Physical Review D 80, 023002 (2009). Paper available at astro-ph:arXiv:0903.0001.

  9. " A minimal set of invariants as a systematic approach to higher order gravity models" Mustapha Ishak, Jacob Moldenhauer. Published in Journal of Cosmology and Astroparticle Physics 0901: 024 (2009). Paper available at astro-ph:arXiv:0808.0951.

  10. " More on Lensing by a Cosmological Constant", Mustapha Ishak, Wolfgang Rindler, Jason Dossett, Monthly Notices of the Royal Astronomical Society Journal, at press February 2010. astro-ph:arXiv:0810.4956.

  11. " Dark Energy or Apparent Acceleration Due to a Relativistic Cosmological Model More Complex than FLRW?" Mustapha Ishak, James Richardson, Delilah Whittington, David Garred. Published in Physical Review D. 78, 123531, (2008). Paper available at astro-ph:0708.2943.

  12. " Light Deflection, Lensing, and Time Delays from Gravitational Potentials and Fermat's Principle in the Presence of a Cosmological Constant" Mustapha Ishak. Published in Physical Review D. 78, 103006, (2008). Paper available at astro-ph:0708.2943.

  13. " A new independent limit on the cosmological constant/dark energy from the relativistic bending of light by Galaxies and clusters of Galaxies" Mustapha Ishak, Wolfgang Rindler, Jason Dossett, Jacob. Moldenhauer, Chris Allison. Monthly Notices of the Royal Astronomical Society Journal, Volume 388, Issue 3, p1279 (2008) astro-ph:arXiv:0710.4726.

  14. " Inverse approach to Einstein's equations for fluids with vanishing anisotropic stress tensor. " James Richardson, Mustapha Ishak. Physical Review D. 77 (2008) 044005. Paper available at gr-qc:0707.135.

  15. " The Contribution of the Cosmological Constant to the Relativistic Bending of light Revisited " Wolfgang Rindler and Mustapha Ishak Physical Review D, 71, 023002 (2007) . Paper available at astro-ph:0709.2948 .

  16. " Remarks on the formulation of the cosmological constant/dark energy questions(2007) " Mustapha Ishak. Foundations of Physics, Volume 37, Number 10, (2007) 1470-1498 . Paper available at astro-ph/0504416.

  17. " Intrinsic galaxy alignments from the 2SLAQ and SDSS surveys: luminosity and redshift scalings and implications for weak lensing surveys(2007) " (2007) Christopher M. Hirata, Rachel Mandelbaum, Mustapha Ishak, Uros Seljak, Robert Nichol, Kevin A. Pimblet, Nicholas P. Ross, David Wake. Monthly Notices of the Royal Astronomical Society volume 381, 1197-1218 (2007). Paper available at astro-ph/0701671 .

  18. "Probing Cosmic Acceleration Beyond the Equation of State: Distinguishing between Dark Energy and Modified Gravity Models" Mustapha Ishak, Amol Upadhye, David N. Spergel (2005). Preprint available at astro-ph/0507184. strong>Physical Review D, 74, 043513 (2006).
    Or click here at NASA' Beyond Einstein web site.
    Or related article in Astronomy Magazine.

  19. "Probing decisive answers to dark energy questions from cosmic complementarity and lensing tomography" Mustapha Ishak (2005). Monthly Notices of the Royal Astronomical Society, V363, issue 2, p469 (2005) . Paper available at astro-ph/0501594 .

  20. "Dynamical dark energy: Current constraints and forecasts" Amol Upadhye, Mustapha Ishak, Paul J. Steinhardt (2004). Physical Review D, 72, 063501 (2005) . Preprint available at astro-ph/0411803 .

  21. "Detection of large scale intrinsic ellipticity-density correlation from the Sloan Digital Sky Survey and implications for weak lens ing surveys" Rachel Mandelbaum, Christopher M. Hirata, Mustapha Ishak, Uros Seljak, Jonathan Brinkmann (2005). Preprint available at astro-ph/0509026. Monthly Notices of the Royal Astronomical Society, 367 (2006) 611-626.

  22. "Spectroscopic source redshifts and parameter constraints from weak lensing and CMB" Mustapha Ishak and Christopher M. Hirata (2004). Physical Review D, 71, 023002 (2005) . Paper available at astro-ph/0405042 .

  23. "Weak Lensing and CMB: Parameter forecasts including a running spectral index" Mustapha Ishak, Christopher M. Hirata, Patrick McDonald, Uros Seljak (2003). Physical Review D, 69, 083914 (2004) . Paper available at astro-ph/0308446 .

  24. "On Perfect Fluid Models In Non-Comoving Null (Observational) Spherical Coordinates," Mustapha Ishak (2003). Physical Review D, 69 , 124027 (2004) . Paper available at gr-qc/0405099 .

  25. "An Inverse Approach to Einstein's Equations for non-conducting fluids" Mustapha Ishak and Kayll Lake (2003). Physical Review D, 68 , 104031 (2003) . Paper available at gr-qc/0304065 .

  26. "Adiabatic Models of the Cosmological Radiative Era," Roberto A. Sussman and Mustapha Ishak. General Relativity and Gravitation, Vol. 34, No. 10, (2002). Paper available at gr-qc/0111010 .

  27. "Stability of Transparent Spherically Symmetric Thin Shells and Wormholes," Ishak Mustapha and Kayll Lake. Physical Review D, 65 , 044011 (2002) . Paper also available at gr-qc/0108058.

  28. "Interactive Geometric Database, Including Exact Solutions of Einstein's Field Equations," Mustapha Ishak and Kayll Lake. ,Classical and Quantum Gravity, 19 , 505-514 (2002) . Paper also available at gr-qc/0111008 . GRDB Version 1.0 was released on July 2001, and is available at http://grdb.org.

  29. "The Tolman VII solution, trapped null orbits and w-modes," Nicholas Neary, Mustapha Ishak and Kayll Lake. Physical Review D, 64, 028001 (2001) . Paper also available at gr-qc/0104002.

  30. "Exact solutions with w-modes," Mustapha Ishak, Luke Chamandy, Nicholas Neary and Kayll Lake. Physical Review D, 64, 024005 (2001) .Paper also available at gr-qc/0007073.

Selected Invited talks, presentations, and colloquia: (to be updated)

  • " The Contribution of The Cosmological Constant/Dark Energy to The Bending of Light Revisited: Applications To Gravitational Lensing, Time Delays and an Upper-bound on The Cosmological Constant". Presentation at the Conference of the American Astronomical Society, AAS Meeting #212, #52.07 (St-Louis, 2008).


  • " Dark Energy or Apparent Acceleration Due to a Relativistic Cosmological Model More Complex than FLRW?". Presentation at the Conference of the American Astronomical Society, Meeting 211, Bulletin of the American Astronomical Society. Austin, TX, (Austin, 2008).


  • " Dark Energy versus Modified Gravity Models: Probing Cosmic Acceleration Beyond the Equation of State". AAS/AAPT Joint Meeting, of the American Astronomical Society, Meeting 209, Bulletin of the American Astronomical Society. Seattle, WA, (January, 2007).


  • " A First Detection of Large-scale Intrinsic Alignments and Implications for Cosmic Shear ". Mandelbaum, R; Hirata, C. M.; Ishak, Mustapha.; Seljak, U. AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #77.27; Bulletin of the American Astronomical Society, Seattle, WA, (January 2007)


  • " Cosmic acceleration: Dark Energy or Modified gravity?" Colloquium given at NASA Goddard Space Flight Center, Baltimore, MA (June, 2006).


  • " Cosmic Acceleration: A Dark Energy Component or a Signature of Modified Gravity at Cosmological Scales?" Colloquium given at the Southern Methodist University, Dallas, TX (October 2006).


  • " Gravitational Weak Lensing and Cosmic Acceleration" Seminar given at the 1st Texas Cosmology Network Meeting at the University of Texas at Austin, Austin, TX (September, 2006).


  • " Recent progress in cosmology and the cosmic acceleration problem" Colloquium given at the Physics Department at Austin College, Sherman, TX. (November 2005). Probing decisive answers to dark energy questions from cosmic complementarity and lensing tomography", Selected talk at the 3rd Oxford-Princeton Workshop on Cosmology, Princeton, NJ (March 2005).


  • " Dark Energy Questions and Cosmological Probe" Colloquium given at the Physics Department of the University of Texas at Dallas, Dallas, (February 2005).


  • " Dynamical Dark Energy: Current and future constraints from cosmic complementarity and weak lensing tomography" Workshop on Gravitational Lensing, Dark Energy, and Dark Matter at the Ohio Center for Theoretical Science. The Ohio State University, Columbus, OH, (January 2005).


  • " "Model-dependent and independent constraints on dark energy from weak lensing (cosmic shear) tomography". Seminar given at the Gravitational Lensing Workshop at the Institute for Advanced Studies, Princeton-IAS, NJ, (2004).


  • " "Future constraints on Dark Energy from complementary observations and weak lensing tomography (a critical discussion)" Seminar given at the Princeton University & Institute for Advanced Studies joint Gravitational Lensing Seminar. Princeton, NJ, (2004).


  • " Inverse Problems In General Relativity and the Cosmic Acceleration." Seminar given at the Gravity Group at Princeton University, Princeton, NJ, (2003).


  • " "Weak Lensing and CMB: Cosmological parameter forecasts including a running spectral index.". Invited talk given at the 13th Kingston Theoretical Astrophysics Meeting, University of British Columbia, Vancouver, BC, (2003).


  • " "GRDB and applications to astrophysics and cosmology" Invited talk given at the Canadian Institute for Theoretical Astrophysics, Toronto, ON, (2002).


  • " "An inverse approach to Einstein Field Equations: fitting cosmological model,", Invited talk given at the joint astrophysics seminars of University of Montreal and McGill University, Montreal, QC, (2002).

Selected Contributed talks and presentations: (to be updated)

  • " Dark Energy versus Modified Gravity Models: Probing Cosmic Acceleration Beyond the Equation of State" Ishak, Mustapha; Upadhye, Amol; Spergel, David 2007 AAS/AAPT Joint Meeting, of the American Astronomical Society, Meeting 209, Bulletin of the American Astronomical Society. Seattle, WA, (January, 2007).


  • " A First Detection of Large-scale Intrinsic Alignments and Implications for Cosmic Shear" Mandelbaum, Rachel; Hirata, C. M.; Ishak, M.; Seljak, U. 2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #77.27; Bulletin of the American Astronomical Society, Seattle, WA, (January 2007).


  • " A new procedure to distinguish between dark energy models and modified gravity models" Ishak, Mustapha; Upadhye, Amol; Spergel, David Presentation given at the April meeting of the American Physical Society, 22-26, 2006, abstract #I7.002, Dallas, (April 2006).


  • " A new procedure to distinguish between dark energy models and modified gravity models" Mustapha Ishak, Amol Upadhye, David Spergel American Astronomical Society Meeting 207, #126.03; Bulletin of the American Astronomical Society, Vol. 37, p.1371. Washington, DC: (January 2006)


  • " Testing if cosmic acceleration is due to Dark Energy or if it is a symptom of the breakdown of General Relativity on cosmological scale" Mustapha Ishak, Amol Upadhye, David Spergel Canadian Astronomical Society meeting at the University of Montreal, Montreal, QC, (March 2005).


  • " "How and when are we going to constrain dark energy parameters to a satisfactory level of precision?" Talk given at the International Workshop on Particle Physics and the Early Universe (COSMO-04), organized by the Canadian Institute for Theoretical Astrophysics. Toronto, ON, (2004).


  • " "Dark Matter and a Possible Solution for the Acceleration Problems," Mustapha Ishak (2003). Poster presented at the 2003 Annual Meeting of the Canadian Astronomical Society, University of Waterloo, Waterloo, ON, (2003).

  • " "From Inverse Problems In General Relativity to a Possible Solution to the Cosmic Acceleration Problems" Mustapha Ishak and Kayll Lake Talk given at the Tenth Canadian Conference on General Relativity and Relativistic Astrophysics, University of Guelph, ON, (2003).


  • " "Perfect Fluid Cosmologies in Null (Observational) Coordinates," Mustapha Ishak Talk given at the Annual Congress of the Canadian Association of Physicists, University of Quebec, QC, (2002).


  • " "A fitting Approach to Cosmology Using Null (Observational) Coordinates," Mustapha Ishak and Kayll Lake. Poster presented at the 2001 Annual Meeting of the Canadian Astronomical Society (McMaster University, 2001, Hamilton, Ontario). Abstract published in the August 2001 issue of the Journal of the Royal Astronomical Society of Canada.


  • " Exact Solutions with w-modes: Scattering of Gravitational Waves By Neutron Stars", Mustapha Ishak, Luke Chamandy and Kayll Lake (2000). In the Proceedings of the 20th Texas Symposium on relativistic Astrophysics (American Institute of Physics. Editors J.C.Wheeler and H. Martel, 2000).


  • " "Inhomogeneous Cosmologies with Adiabatic Evolution," Roberto Sussman and Mustapha Ishak (2000). Developments in Mathematical and Experimental Physics, Volume A: Cosmology and Gravitation. Edited by Alfredo Macias, Francisco Uribe and Enrique Diaz. ISBN 0-306-47293-7. QC19.2 .M48 2001 530.15--dc21. Published by Kluwer Academic Publishers/Plenum Publishers, Dordrecht, The Netherlands, 2002, p.285.


  • " "GRlite and GRTensorJ: Graphical User Interfaces to the Computer Algebra System GRTensorI"I, Mustapha Ishak, Peter Musgrave, John Mourra, Jonathan Stern and Kayll Lake. Proceedings of the Eight Canadian Conference on General Relativity and Relativistic Astrophysics (American Institute of Physics. Editors C.P.Burgess and R.C.Myers, 1999). Paper also available at Los Alamos Archive Server as gr-qc/9911012

Workshops and Summer Schools attended:

  • "Conference and workshop on Dark Energy at McMaster University and the Perimeter Institute." May 2007. " The conference was meant to bring together observers and theorists in astronomy, cosmology and particle physicists to highlight the observational evidence and theoretical ideas for Dark Energy, and to highlight the most promising future directions. To this end the meeting included broad review talks with which to start the discussion on each of the main areas of enquiry. The workshop focused on novel theoretical ideas on the nature of the dark sector and their prospects for observations. The workshop format was intended to be very informal, with few talks and ample time for discussions and interactions "


  • "Gravitational Lensing, Dark Energy and Dark Matter Workshop" at the Ohio Center for Theoretical Science, the Ohio State University, Columbus, 2005. "The goals of this workshop were to assess the current constraints on the nature of dark matter and dark energy from strong and weak gravitational lensing and gravitational microlensing, and to assess the prospects for stronger constraints with the ambitious surveys and instruments presently being planned or going into operation. Specific topics included: models of dark matter and dark energy, microlensing constraints on baryonic dark matter, mass profiles of galaxies and clusters, evidence for dark matter substructure, cosmic shear and galaxy-galaxy lensing as probes of dark matter and dark energy, systematic uncertainties in lensing measurements and their interpretation, wide-area imaging surveys from the ground and from space, lensing of high-redshift 21cm emission and CMB anisotropies, and the interplay of lensing and CMB constraint"


  • "Prospects in Theoretical Physics (Summer School)" at the Institute for Advanced Study, July 2003. An intensive summer school program exploring the compelling new problems and research opportunities at the interface of Astro/Particle Physics and Cosmology.


  • "1st Oxford-Princeton Workshop on Cosmology" at the Dept. of Astrophysical Sciences, Peyton Hall, Princeton University, March 2003. The focus of the workshop was to discuss new results from: CMB temperature and polarization experiments (MAP, ARCHEOPS, BOOMERANG2K2 etc.); galaxy surveys (SDSS, 2dF). As well as their cosmological implications: theoretical interpretations; new constraints on cosmological parameters; links with complementary results such as cluster abundances, Ly-alpha, weak and strong lensing.


  • "Cosmological Probes of Dark Energy". Workshop attended at the Center for Cosmological Physics at the University of Chicago, December 2001. The workshop was devoted to addressing the efficacy of various cosmological probes of dark energy, including SNeIa, weak and strong gravitational lensing, galaxy and cluster counts, CMB anisotropy, and the Alcock-Paczynski test. The workshop brought together experts to study and discuss the important details and systematics associated with these cosmological probes as well as new ideas or strategies.

Current and previous collaborations, software, and projects:

Gravitational Lens: Galaxy Cluster 0024+1654

Gravitational Lens: Galaxy Cluster 0024+1654
W. N. Colley (Princeton University), E. Turner (Princeton University),
J. A. Tyson (AT&T Bell Labs), and NASA


Wilkinson Microwave Anisotropy Probe

From the Wilkinson Microwave Anisotropy Probe (WMAP):
First Year Results.
(WMAP is a NASA Explorer Mission.):

  • Updated: September 12, 2012