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Mustapha Ishak-Boushaki
Associate Professor-Physics Department
Contact Address   800 West Campbell road, Richardson, TX 75080     Office MailstopMail Box: PHYS, Physics building 
Email Address    Primary Phone Number 972.883.2815    URL Personal/Research Webpage   URL Cosmology Group Webpage    Media Contact
 Professional Preparation
 Ph.D.CosmologyQueen's University at Kingston2002
 B.A.ScComputer ScienceUniversity at Quebec of Montreal1998
 B.S.PhysicsUniversity of Montreal1994
Collapse Section Expand Section Research and Expertise
Research Interests
  • The origin/cause of the acceleration of the expansion of the Universe: Cosmological Constant, Dark Energy, Extensions to General Relativity.
  • Testing Dark Energy versus Modified Gravity at Cosmological Scales of Distance
  • Gravitational Lensing and Applications to Cosmology
  • Constraining cosmological parameters and cosmological models using probes such as gravitational lensing, the cosmic microwave background (CMB), and supernova data
  • Inhomogeneous Cosmological Models and the Averaging Problem in Cosmology
  • Selected topics in General Relativity and Exact Solutions to Einstein's Equations
  • Projects at the intersection of modern cosmology and General Relativity
  • Junction Conditions for Matching Spacetimes and Constructing Wormholes and Thin-shells
  • Computer Algebra (symbolic computing) and application to cosmology and general relativity
Collapse Section Expand Section Publications
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  YearPublication  Type

"Cross-correlation between cosmic microwave background lensing and galaxy intrinsic alignment as a contaminant to gravitational lensing cross-correlated probes of the universe ", M. A. Troxel, Mustapha Ishak Published in Physical Review D 89, (2014) 063528. Paper available at

Peer reviewed

"Effect of inhomogeneities on high precision measurements of cosmological distances ", Austin Peel, M. A. Troxel, Mustapha Ishak Published in Physical Review D 90, (2014) 123536. Paper available at

Peer reviewed

"The effects of structure anisotropy on lensing observables in an exact general relativistic setting for precision cosmology ", M. A. Troxel, Mustapha Ishak, Austin Peel Published in JCAP 1403:040, (2014). Paper available at

Peer reviewed

"The Intrinsic Alignment of Galaxies and its Impact on Weak Gravitational Lensing in an Era of Precision Cosmology. ", M.A. Troxel, Mustapha Ishak Published in Physics Reports doi:10.1016/j.physrep.2014.11.001 (2014). Paper available at

Peer reviewed

"Stringent Restriction from the Growth of Large-Scale Structure on Apparent Acceleration in Inhomogeneous Cosmological Models. ", Mustapha Ishak, Austin Peel, M.A. Troxel Published in Physical Review Letters 111, (2013) 251302. Paper available at

Peer reviewed
Collapse Section Expand Section Affiliations
Cosmology, Relativity and Astrophysics Group :
Professor Mustapha Ishak-Boushaki (Group Leader), Professor Xingang Chen, Professor Mike Kesden, Professor Lindsay King, Professor Wolfgang Rindler (Emeritus).
Graduated Ph.D. Students:
James Richardson (graduated in 2008). Working in the corporate sector.
Jacob Moldenhaeur (graduated in 2010). Assistant Professor at University of Dallas.
Anthony Nwankwo (graduated in 2011). Working in the corporate sector.
Jason Dossett (graduated in 2013). Working as Research Fellow in Astrophysics at INAF -- Osservatorio Astronomico di Brera, Italy.
Michael Troxel (graduated May 2014). Working as Research Associate in Astrophysics at the University of Manchester, UK.
Current graduate students:
Austin Peel (Ph.D. graduation expected in May 2015. Will start Associate Research position at CEA, Saclay.)
Tharake Wijenayake (Ph.D. graduation expected in May 2015)
Weikang Li (graduation expected in 2017)
Yao Ji graduation expected in 2018)
Jonathan Woodberry (graduation expected in 2019)
Masters students supervised
Chris Allison
Jeffrey Scott
Brian Troup
Delilah Whittington
John Thompson
Lee Caps
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)
Thomas Griffins (Undergraduate Research Project, 2012)
Nathan Newton (Undergraduate Research Project, 2012)
Jonathan Woodbury (undergraduate Thesis/research, 2013)
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
Collapse Section Expand Section Appointments
DurationRankDepartment / SchoolCollege / OfficeUniversity / Company
2011-presentAssociate Professor  The University of Texas at Dallas
2005-2011Assistant Professor  The University of Texas at Dallas
2003-2004Lecturer  Princeton University
2003-2005Research Associate  Princeton University
1998-2002Teaching Assistant  Queen's University
1998-2002Research Assistant  Queen's University
 News Articles
Study Finds 'Lumpy' Universe Cannot Explain Cosmic Acceleration
News Center at UT Dallas

Astrophysicists at The University of Texas at Dallas are helping to better define the nature of the cosmos by examining why the universe appears to be expanding at an accelerating pace.

In the last century, scientists developed the Big Bang model, which posits that the universe began when a single point containing all the matter in the universe exploded some 13.8 billion years ago. Since then, the universe has been expanding.

In 1998, researchers observed light from exploding stars called supernovas, and found that the universe is not expanding at a constant rate, nor is it slowing down, as would be expected from the force of gravity pulling all matter together. Instead, scientists found that the expansion is speeding up.

“Because we have eliminated one possibility, researchers can now focus on examining other possible theories as a cause of cosmic acceleration,” said Dr. Mustapha Ishak-Boushaki, an associate professor of physics.

NASA Funds Investigation of a Cosmic Mystery
News Center at UT Dallas

Mustapha Ishak-Boushaki


 Cosmologist Dr. Mustapha Ishak-Boushaki received a $180,000 NASA grant to    embark on a two-year study of new models to explain why our universe is    picking up speed while it tears itself apart.

 Ishak-Boushaki, an assistant professor of physics and principal investigator of  the UT Dallas Astrophysics, Cosmology and Relativity Group, is  using  mathematical and numerical tools to explore cosmological models, called  Szekeres models, which may offer a more complete explanation of cosmic  acceleration than previous models.

 Cosmology is the branch of astrophysics concerned with the origin, evolution  and structure of the universe. Widely considered the most perplexing problem to  ever confront astrophysicists, the universe presents a baffling contradiction to  logic: gravity should slow the expansion of the universe, not let it speed up.

Prof Explores Universe Through Gravity Lens Studies
News Center at UT Dallas

The National Science Foundation recently awarded Dr. Mustapha Ishak-Boushaki, associate professor of physics at UT Dallas, a $222,000 research grant for his investigations of the gravitational lensing technique used to study the nature of the universe.
His studies are aimed at improving the technique to more accurately measure the distribution and density of mass in the universe. His research also could contribute to a better understanding of dark matter, a type of matter thought to be about five times more prevalent than ordinary matter that can be seen through telescopes.Gravitational lensing also can be used to test cosmological models of the universe.
“The NSF grant will allow our team to investigate new theoretical and numerical techniques that should help refine the signals received on Earth from deep-sky objects affected by gravitational lensing,” Ishak-Boushaki said.

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 Additional Information
Professional Recognitions and Service

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 by Chief Editor Gerardus 't Hooft (Nobel Laureate in Physics 1999) to appear in the highlights of 2008 of the Foundation of Physics Journal. Article title: Remarks on the formulation of the cosmological constant/dark energy questions. Mustapha Ishak. Foundation of physics 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
  •  Journal paper highlighted at Physical Review Letters as Editors' suggestion and selected for a synopsis in Spotlighting Exceptional Research in Physics website of the American Physical Society. "Stringent Restriction from the Growth of Large-Scale Structure on Apparent Acceleration in Inhomogeneous Cosmological Models", Mustapha Ishak, Austin Peel, and M. A. Troxel. Phys. Rev. Lett. 111, 251302 (2013).
  •  2013 Robert S. Hyer Award for Excellence in Research from the Texas Section of the American Physics Society. Jointly with Michael Troxel. 



 National and International Service contributions:

  •  Served as proposal reviewer for the National Science Foundation, Astronomy and Astrophysics Grant program
  • Served as proposal reviewer for the International Collaboration Program of the National Science Foundation
  • Served as proposal reviewer for NASA Astronomy and Astrophysics Postdoctoral Program.
  • Served as proposal reviewer for Research Foundation of Canada/Quebec for Natural Sciences and Technology.
  • Served as proposal reviewer for the National Commission for Scientific and Technological Research of Chile (CONICYT Chile).
  • Reviewed a proposal for The Foundation for Polish Science.
  • Served as proposal reviewer for the Texas Space Grant Consortium
  • Serving on the Editorial Board of Journal of Gravity. HPC publishing. New York. 
  • Served as Chair for the Cosmic Microwave Background session at the 2010 Annual conference of the American Astronomy Society in Washington DC.
  • Served as Chair for the Dark Matter & Dark Energy session of the 2010 Annual conference of the American Astronomy Society in Washington DC.
  • Served as Chair for the cosmology session of the 2012 Annual conference of the American Astronomy Society in Austin, TX.
  • Chaired a session on cosmic acceleration at the second Texas Cosmology Network Meeting at the University of Texas at Austin
  • Serving as member of the Large Synoptic Survey Telescope (LSST) DESC Science Collaboration. 

 University Current and Previous Service Contributions:

  •  Member of the University Academic Senate (2007-present)
  • Member of the Senate Advisory Committee on Research (2008-2010)
  • Member/Chair of the University Sustainability Committee (2012-present)
  • Member of the Physics Graduate Admission Committee (2006-present)
  • Member of the Physics Department committee on undergraduate education  (2005-2009)
  • Member and Chair of the Ph.D. Physics qualifier exam (2006-2014)
  • Advisor to the Society of Physics Students (2008-2010)
  • Chair of the cosmology faculty search committee (2011)
  • Chair of the cosmology faculty search committee (2012)
  • Member of space science faculty search committees (2009, 2010)
  • Member of the physics faculty development committee (2010-present).
  • Member of faculty third year review (2011, 2012)
  • Member of faculty tenure review (2012)
  • Outside Chair for Ph.D. Final Examinations (one per year)
  • Co-Chaired the local and international scientific organizing committees of the 27thTexas Symposium on Relativistic Astrophysics. (Jubilee meeting).


Mustapha Ishak and his graduate students Jason Dossett, Austin Peel and Michael Troxel at the 219th AAS Annual Meeting, Austin, TX (2012). 

Ishak and his graduate Students at AAS meeting

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