(Now at IPAC, Caltech)

Dark Energy (technical book)

Latest Dark Energy Measurements

JEDI (Joint Efficient Dark-energy Investigation)

SN flux-averaging code

Publications   Refereed Papers with Over 50 Citations

The h-index and Total Number of Citations:
Astrophysics Data System:    h-index = 41    total citations = 5758
INSPIRE HEP:    h-index = 38    total citations = 4700
Web of Science:    h-index = 35    total citations = 3736


Cosmology Group Members

Press: <|Science:1  2|>,   <|New York Times|>,  <|Nature|>,  <|Physics World|>,  <|Astronomy Magazine|>,   <|Essential Science Indicators: 1  2|>,  <|Sooner Magazine|>,  <|Physics Today|>

Selected Talks:
  • Galaxy Clustering as a Cosmological Probe (review talk at Sesto 2013) 
  • Cosmology with the EUCLID Spectroscopic Survey (LAM 2010) 
  • Dark Energy Figure of Merit (STScI Dark Energy Symposium 2008) 
  • Dark Energy Review (Lepton Photon 2007) 
  • Theoretical Tools for Supernova Cosmology (Aspen 2007) 

    Our Place in the Universe (Picture Album)
    Interview With a Priest   Interview With a Poet

    The Book of Totality
    The Book of Jade:   Sample Poems and Reviews
    The Carp   Review of The Carp
    Recently Published Poems  
    Translations of Su Dong Po's Poems
  •  Research Interests (Click here for details):
  • Galaxy clustering as dark energy probe
  • Supernovae as dark energy probe
  • Cosmological data analysis
  • Cosmic microwave background anisotropy
  • Observational constraint on inflationary models
  • Gravitational lensing and cosmology
  • Measurement of cosmological parameters

    Research Funding:
    Current: NASA
    Previous: DOE & NSF CAREER Award

    Participation in Dark Energy Space Missions:
    EUCLID (as Deputy Coordinator of the Euclid Galaxy Clustering Science Working Group)
    WFIRST (as a member of the WFIRST and WFIRST-AFTA Science Definition Teams)

    Participation in Ground-based Cosmology Projects:
    LSST (as the co-leader of LSST Dark Energy Science Collaboration High Priority Task "Cosmology from Photometric Supernovae", and a member of the LSST Supernova Science Collaboration)
    ALPACA (as the chair of the ALPACA Science Advisory Council)

    Euclid Definition Study Report (The Red Book)
    LSST Science Book

    Dept. of Physics & Astronomy
    The University of Oklahoma
    440 W. Brooks St., Norman, OK 73019

    e-mail: wang at

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  • Top: The imprint of primordial seeds (matter density fluctuations) in the cosmic microwave background as seen by the Wilkinson Microwave Anisotropy Probe (WMAP).
    Left: WMAP (launched June 30, 2001) in orbit. Right: Our current knowledge of the composition of matter and energy in the universe.
    Hubble Deep Field North

    Left: A very deep view of space from the Hubble Space Telescope. (credit: HDF team)

    Right: a simulation of a slice of the universe as seen by the Sloan Digital Sky Survey (SDSS). (credit: the SDSS team)

    Selected papers (1996-present) sorted by subject (click here for my complete publication list; and click here for most-cited papers):

      Probing Dark Energy

    1. Model-Independent Measurements of Cosmic Expansion and Growth at z=0.57 Using the Anisotropic Clustering of CMASS Galaxies From the Sloan Digital Sky Survey Data Release 9 (MNRAS, 443, 2950 (2014))

    2. Measurement of H(z) and D_A(z) from the two-dimensional power spectrum of Sloan Digital Sky Survey luminous red galaxies (MNRAS, 445, 3737 (2014))

    3. Exploring the Systematic Uncertainties of Type Ia Supernovae as Cosmological Probes (PRD, 88, 043511 (2013))

    4. Distance Priors from Planck and Dark Energy Constraints from Current Data (PRD, 88, 043522 (2013))

    5. Toward More Realistic Forecasting of Dark Energy Constraints from Galaxy Redshift Surveys, (MNRAS, 430, 2446 (2013))

    6. Modeling the Anisotropic Two-Point Galaxy Correlation Function on Small Scales and Improved Measurements of H(z), D_A(z), and \beta(z) from the Sloan Digital Sky Survey DR7 Luminous Red Galaxies, (MNRAS, 435, 255 (2013))

    7. Using Multipoles of the Correlation Function to Measure H(z), D_A(z), and \beta(z) From SDSS Luminous Red Galaxies (MNRAS 431, 2634 (2013))

    8. Probing deviations from General Relativity with the Euclid spectroscopic survey (MNRAS, 424, 1392(2012))

    9. Robust constraints on dark energy and gravity from galaxy clustering data (MNRAS, 423, 3631 (2012))

    10. A Comparative Study of Dark Energy Constraints from Current Observational Data (Phys. Rev. D 85, 023517 (2012))

    11. Measurements of H(z) and D(z) from the Two-Dimensional Two-Point Correlation Function of Sloan Digital Sky Survey Luminous Red Galaxies, (MNRAS, 426, 226 (2012))

    12. A Robust Distance Measurement and Dark Energy Constraints from the Spherically-Averaged Correlation Function of Sloan Digital Sky Survey Luminous Red Galaxies, (MNRAS, 423, 1474 (2012))

    13. Observational Probes of Dark Energy (Invited plenary talk at Spanish Relativity Meeting 2011 (ERE2011))

    14. Neutrino constraints from future nearly all-sky spectroscopic galaxy surveys (JCAP 03 (2011) 030)

    15. Effects of cosmological model assumptions on galaxy redshift survey measurements, (MNRAS, 410, 1993 (2011))

    16. Designing a space-based galaxy redshift survey to probe dark energy, (MNRAS, 409, 737 (2010))

    17. Probing dark energy with future redshift surveys: A comparison of emission line and broad band selection in the near infrared (MNRAS, 405, 1006 (2010))

    18. Empirical H-alpha emitter count predictions for dark energy surveys (MNRAS, 402, 1330 (2010))

    19. Forecasts of Dark Energy Constraints from Baryon Acoustic Oscillations (MPLA, 25, 3093 (2010))

    20. Distance Measurements from Supernovae and Dark Energy Constraints (PRD 80, 123525 (2009))

    21. SPACE: the SPectroscopic All-sky Cosmic Explorer, (Experimental Astronomy, 23, 39 (2009))

    22. Model-Independent Distance Measurements from Gamma-Ray Bursts and Constraints on Dark Energy, (PRD, 78, 123532 (2008))

    23. Figure of Merit for Dark Energy Constraints from Current Observational Data, (PRD, 77, 123525 (2008))

    24. Planck priors for dark energy surveys, (PRD 78, 083529 (2008) )

    25. Improving the Calibration of Type Ia Supernovae Using Late-time Lightcurves (MNRAS 389, 489 (2008))

    26. Differentiating dark energy and modified gravity with galaxy redshift surveys (JCAP05(2008)021)

    27. Observational Bounds on Modified Gravity Models (Phys. Rev. D 77, 024017 (2008))

    28. Observational approaches to understanding dark energy (Invited review at Lepton and Photon 2007)

    29. Survey Requirements for Accurate and Precise Photometric Redshifts for Type Ia Supernovae (MNRAS, 382, 377 (2007))

    30. Observational Constraints on Dark Energy and Cosmic Curvature (Phys. Rev. D 76, 103533 (2007))

    31. A Model-Independent Photometric Redshift Estimator for Type Ia Supernovae (ApJ, 654, L123 (2007))

    32. Present and future evidence for evolving dark energy (PRD, 74, 123506 (2006))

    33. Robust Dark Energy Constraints from Supernovae, Galaxy Clustering, and Three-Year Wilkinson Microwave Anisotropy Probe Observations ( ApJ, 650, 1 (2006))

    34. Dark Energy Constraints from Baryon Acoustic Oscillations ( ApJ, 647, 1 (2006))

    35. Probing Dark Energy Using Its Density Instead of Its Equation of State, (Phys. Lett. B, 632, 449 (2006))

    36. Joint Efficient Dark-energy Investigation (JEDI): a Candidate Implementation of the NASA-DOE Joint Dark Energy Mission (JDEM) (JEDI white paper submitted to the Dark Energy Task Force (2005))

    37. Uncorrelated Measurements of the Cosmic Expansion History and Dark Energy from Supernovae, (Phys. Rev. D 71, 103513 (2005))

    38. Observational signatures of the weak lensing magnification of supernovae, (JCAP, 03, 005 (2005))

    39. Current Observational Constraints on Cosmic Doomsday, (JCAP, 12, 006 (2004))

    40. Dark Energy Search with Supernovae, (in proceedings of the 6th UCLA Symposium on Dark Matter and Dark Energy, (2004))

    41. New dark energy constraints from supernovae, microwave background and galaxy clustering (Phys. Rev. Lett., 92, 241302 (2004))

    42. Probing the Evolution of the Dark Energy Density with Future Supernova Surveys, (JCAP, 12, 003 (2004))

    43. Model-Independent Constraints on Dark Energy Density from Flux-averaging Analysis of Type Ia Supernova Data, (ApJ, 606, 654 (2004))

    44. Galaxy Clustering and Dark Energy (MNRAS, 349, 281 (2004))

    45. Future Type Ia Supernova Data as Tests of Dark Energy from Modified Friedmann Equations (ApJ, 594, 25-32 (2003))

    46. Dark energy effects on the Lyman-alpha forest (MNRAS, 340, L47 (2003))

    47. How Sensitive Are Weak Lensing Statistics to Dark Energy Content? (Astrophys. J., 583, 566-574 (2003))

    48. A Universal Probability Distribution Function for Weak-lensing Amplification, (Astrophys. J., 572, L15-L18 (2002))

    49. Unbiased Estimate of Dark Energy Density from Type Ia Supernova Data, (Astrophys. J., 562, L115 (2001))

    50. Measuring Time-Dependence of Dark Energy Density from Type Ia Supernova Data, (Astrophys. J. 552, 445 (2001))

    51. Flux-averaging Analysis of Type Ia Supernova Data(Astrophys. J. 536, 531 (2000))

    52. Supernova pencil beam survey (astro-ph/9806185, Astrophys. J. 531, 676 (2000))

    53. Analytical Modeling of the Weak Lensing of Standard Candles (Astrophys. J. 525, 651 (1999))

    54. The Cosmological Constant and Advanced Gravitational Wave Detectors, (Phys. Rev. D56, 724 (1997).)

      Probing Early Universe Physics

    55. Primordial Power Spectrum Reconstruction, (JCAP, 12 (2005) 007)

    56. Looking for Cosmological Alfven Waves in WMAP Data, (ApJ, 611, 655 (2004))

    57. Wavelets and WMAP non-Gaussianity, (ApJ, 613, 51 (2004))

    58. Model-Independent Reconstruction of the Primordial Power Spectrum from WMAP Data (ApJ, 599, 1 (2003))

    59. Direct Wavelet Expansion of the Primordial Power Spectrum (ApJ, 598, 779 (2003))

    60. Wavelet Band Powers of the Primordial Power Spectrum from CMB Data (ApJ, 593, 38 (2003))

    61. A Measurement of the Primordial Power Spectrum from Maxima, Boomerang, and DASI Data, (Astrophys. J. 573, 1 (2002))

    62. Cosmology in the Next Millennium: Combining MAP and SDSS Data to Constrain Inflationary Models (Astrophys. J. 510, 20 (1999))

    63. A Fast and Accurate Algorithm for Computing Tensor CBR Anisotropy (Phys.Rev. D 53, 5727 (1996))

    64. Simple Analytical Methods for Computing the Gravity-Wave Contribution to the Cosmic Background Radiation Anisotropy (Phys.Rev. D 53, 639 (1996))

      Gravtitational Lensing

    65. Caustics, critical curves and cross sections for gravitational lensing by disk galaxies(MNRAS, 292, 863 (1997))

    66. A Robust Determination of the Time Delay in 0957+561A,B and a Measurement of the Global Value of Hubble's Constant (Astrophys. J. 482, 75 (1997).)

    67. Statistics of Extreme Gravitational Lensing Events. II. The Small Shear Case(Astrophys. J. 482, 63 (1997).)

    68. Gravitational Lensing of Gravitational Waves from Merging Neutron Star Binaries(Phys.Rev.Lett. 77, 2875 (1996))

    69. Statistics of Extreme Gravitational Lensing Events. I.The Zero Shear Case(Astrophys.J. 464, 114 (1996))

      Cosmological Parameters

    70. Constraints on Neutrino Degeneracy from the Cosmic Microwave Background and Primordial Nucleosynthesis, (Phys. Rev. D 65, 123504 (2002).

    71. Constraints on extra dimensions from cosmological and terrestrial measurements, (Mod. Phys. Lett. A, Vol. 16, No. 35, pp. 2281, (2001))

    72. Prospects for Constraining Cosmology with the Extragalactic Cosmic Microwave Background Temperature, (Phys. Rev. D 64 (2001) 123002.

    73. Implications of cosmic microwave background anisotropies for large scale variations in Hubble's constant (Astrophys. J., 498, 1 (1998))

      Photometric Redshifts

    74. A Model-Independent Photometric Redshift Estimator (in the proceedings of theWorkshop on Photometric Redshifts and High Redshift Galaxies,edited by Ray Weymann, et al. (Astronomical Society of the Pacific),1999)

    75. A Catalog of Color-based Redshift Estimates for z < 4 Galaxies in the Hubble Deep Field (AJ 116, 2081 (1998))

      Dark Matter

    76. The Secondary Infall Model of Galactic Halo Formation and the Spectrum of Cold Dark Matter Particles on Earth (Phys. Rev. D56, 1863 (1997).)

    All astro images were taken by the Hubble Space Telescope and courtesy of NASA and STScI, unless otherwise noted.

    Updated by Yun Wang on 7/25/2013.

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    NGC 3310: grand design spiral galaxy