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Showing results 1 through 18 (of 18 total) for au:ishak

1. arXiv:0905.2470 [ps, pdf, other]

Title: Contiguous redshift parameterizations of the growth index

Authors: Mustapha Ishak, Jason Dossett (The University of Texas at Dallas)

Comments: 7 pages, 6 figures, matches PRD accepted version

Journal-ref: Phys. Rev. D 80, 043004 (2009)

Subjects: Cosmology and Extragalactic Astrophysics (astro-ph.CO); General Relativity and Quantum Cosmology (gr-qc)

2. arXiv:0903.0001 [ps, pdf, other]

Title: Growth factor parametrization in curved space

Authors: Yungui Gong, Mustapha Ishak, Anzhong Wang

Comments: latex, 8 figures

Journal-ref: Phys.Rev.D80:023002,2009

Subjects: Cosmology and Extragalactic Astrophysics (astro-ph.CO); High Energy Astrophysical Phenomena (astro-ph.HE); General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Phenomenology (hep-ph)

3. arXiv:0810.4956 [ps, pdf, other]

Title: More on Lensing by a Cosmological Constant

Authors: Mustapha Ishak, Wolfgang Rindler, Jason Dossett (The University of Texas at Dallas)

Comments: 5 pages

Subjects: Astrophysics (astro-ph); General Relativity and Quantum Cosmology (gr-qc)

4. arXiv:0808.0951 [ps, pdf, other]

Title: A minimal set of invariants as a systematic approach to higher order gravity models

Authors: Mustapha Ishak, Jacob Moldenhauer (The University of Texas at Dallas)

Comments: 15 pages, 4 figures, matches JCAP accepted version

Journal-ref: JCAP 0901:024, 2009

Subjects: Astrophysics (astro-ph); General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Theory (hep-th)

5. arXiv:0801.3514 [ps, pdf, other]

Title: Light Deflection, Lensing, and Time Delays from Gravitational Potentials and Fermat's Principle in the Presence of a Cosmological Constant

Authors: Mustapha Ishak (The University of Texas at Dallas)

Comments: 6 pages, 1 figure, matches version published in PRD

Journal-ref: Phys.Rev.D78:103006,2008

Subjects: Astrophysics (astro-ph); General Relativity and Quantum Cosmology (gr-qc)

6. arXiv:0710.4726 [ps, pdf, other]

Title: A New Independent Limit on the Cosmological Constant/Dark Energy from the Relativistic Bending of Light by Galaxies and Clusters of Galaxies

Authors: Mustapha Ishak, Wolfgang Rindler, Jason Dossett, Jacob Moldenhauer, Chris Allison (The University of Texas at Dallas)

Comments: 5 pages, 1 figure, matches version published in MNRAS

Journal-ref: MNRAS 388, 1279-1283 (2008)

Subjects: Astrophysics (astro-ph); General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Theory (hep-th)

7. arXiv:0709.2948 [ps, pdf, other]

Title: The Contribution of the Cosmological Constant to the Relativistic Bending of Light Revisited

Authors: Wolfgang Rindler, Mustapha Ishak (The University of Texas at Dallas)

Comments: 5 pages, 2 figures

Journal-ref: Phys.Rev.D76:043006,2007

Subjects: Astrophysics (astro-ph); General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Theory (hep-th)

8. arXiv:0708.2943 [ps, pdf, other]

Title: Dark Energy or Apparent Acceleration Due to a Relativistic Cosmological Model More Complex than FLRW?

Authors: Mustapha Ishak, James Richardson, David Garred, Delilah Whittington, Anthony Nwankwo, Roberto Sussman

Comments: 6 pages, 1 figure, matches version published in PRD

Journal-ref: Phys.Rev.D78:123531,2008

Subjects: Astrophysics (astro-ph); General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Theory (hep-th)

9. arXiv:0707.1351 [ps, pdf, other]

Title: Inverse approach to Einstein's equations for fluids with vanishing anisotropic stress tensor

Authors: James Richardson, Mustapha Ishak (The University of Texas at Dallas)

Comments: 15 pages, matches version to appear in Phys.Rev.D

Journal-ref: Phys.Rev.D77:044005,2008

Subjects: General Relativity and Quantum Cosmology (gr-qc)

10. arXiv:astro-ph/0504416 [ps, pdf, other]

Title: Remarks on the formulation of the cosmological constant/dark energy problems

Authors: Mustapha Ishak (The University of Texas at Dallas)

Comments: 32 pages, 9 figures. Significantly expanded version. To appear in Foundations of Physics Journal

Journal-ref: Found.Phys.37:1470-1498,2007

Subjects: Astrophysics (astro-ph); General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Theory (hep-th)

11. arXiv:gr-qc/0405099 [ps, pdf, other]

Title: On perfect fluid models in non-comoving observational spherical coordinates

Authors: Mustapha Ishak (Princeton University)

Comments: 8 pages, 1 figure. To appear in Phys.Rev.D

Journal-ref: Phys.Rev. D69 (2004) 124027

Subjects: General Relativity and Quantum Cosmology (gr-qc); Astrophysics (astro-ph)

12. arXiv:gr-qc/0304065 [ps, pdf, other]

Title: An inverse approach to Einstein's equations for non-conducting fluids

Authors: Mustapha Ishak (1), Kayll Lake (2) ((1) Princeton University, (2) Queen's University, Kingston)

Comments: 9 pages revtex4. Final form to appear in Phys Rev D

Journal-ref: Phys.Rev.D68:104031,2003

Subjects: General Relativity and Quantum Cosmology (gr-qc)

13. arXiv:gr-qc/0111010 [ps, pdf, other]

Title: Adiabatic models of the cosmological radiative era

Authors: Roberto A. Sussman, Mustapha Ishak

Comments: 19 pages revtex4, 10 figures. Final form to appear in Gen. Rel. Grav

Journal-ref: Gen.Rel.Grav. 34 (2002) 1589-1616

Subjects: General Relativity and Quantum Cosmology (gr-qc)

14. arXiv:gr-qc/0111008 [ps, pdf, other]

Title: An Online Interactive Geometric Database: Including Exact Solutions of Einstein's Field Equations

Authors: Mustapha Ishak, Kayll Lake

Comments: 11 pages revtex4 4 figures. Final form to appear in Class. Quantum Grav. Further information at this http URL

Journal-ref: Class.Quant.Grav. 19 (2002) 505-514

Subjects: General Relativity and Quantum Cosmology (gr-qc)

15. arXiv:gr-qc/0108058 [ps, pdf, other]

Title: Stability of Transparent Spherically Symmetric Thin Shells and Wormholes

Authors: Mustapha Ishak, Kayll Lake

Comments: 12 pages, 7 figures, revtex. Final form to appear in Phys. Rev. D

Journal-ref: Phys.Rev. D65 (2002) 044011

Subjects: General Relativity and Quantum Cosmology (gr-qc)

16. arXiv:gr-qc/0104002 [ps, pdf, other]

Title: The Tolman VII solution, trapped null orbits and w - modes

Authors: Nicholas Neary, Mustapha Ishak, Kayll Lake

Comments: 5 pages revtex. 10 figures png. Further information at this http URL

Journal-ref: Phys.Rev. D64 (2001) 084001

Subjects: General Relativity and Quantum Cosmology (gr-qc); Astrophysics (astro-ph)

17. arXiv:gr-qc/0007073 [ps, pdf, other]

Title: Exact Solutions with w - modes

Authors: Mustapha Ishak, Luke Chamandy, Nicholas Neary, Kayll Lake

Comments: Final form to appear in Phys. Rev. D. Further information on the web at this http URL

Journal-ref: Phys.Rev. D64 (2001) 024005

Subjects: General Relativity and Quantum Cosmology (gr-qc); Astrophysics (astro-ph)

18. arXiv:gr-qc/9911012 [ps, pdf, other]

Title: GRLite and GRTensorJ: Graphical user interfaces to the computer algebra system GRTensorII

Authors: Mustapha Ishak, Peter Musgrave, John Mourra, Jonathan Stern, Kayll Lake

Comments: To appear in the Proceedings of the Eighth Canadian Conference on General Relativity and Relativistic Astrophysics . Requires two figures, grliteview.png and grtensorjview.png

Subjects: General Relativity and Quantum Cosmology (gr-qc); Astrophysics (astro-ph); Materials Science (cond-mat.mtrl-sci); Computational Physics (physics.comp-ph)