J. F. Hennawi

HST Discovery of a z = 3.9 Multiply Imaged Galaxy Behind the Complex Cluster Lens WARPS J1415.1+36 at z = 1.026 (2009)

Huang, X., Morokuma, T., Fakhouri, H. K., Aldering, G., Amanullah, R., Barbary, K., ...

We report the discovery of a multiply lensed Ly Alpha (Lya) emitter at z = 3.90 behind the massive galaxy cluster WARPS J1415.1+3612 at z = 1.026. Images taken by the Hubble Space Telescope(HST)...

A Gravitationally Lensed Quasar with Quadruple Images Separated by 14.62 Arcseconds (2003)

Inada, N., Oguri, M., Pindor, B., Hennawi, J. F., Chiu, K., Zheng, W., ...

Gravitational lensing is a powerful tool for the study of the distribution of dark matter in the Universe. The cold-dark-matter model of the formation of large-scale structures predicts the existence...

Observations and Theoretical Implications of the Large Separation Lensed Quasar SDSS J1004+4112 (2003)

Oguri, M., Inada, N., Keeton, C. R., Pindor, B., Hennawi, J. F., Gregg, M. D., ...

We study the recently discovered gravitational lens SDSS J1004+4112, the first quasar lensed by a cluster of galaxies. It consists of four images with a maximum separation of 14.62''. The system has...

LSST: a Complementary Probe of Dark Energy (2002)

Tyson, J. A., Wittman, D. M., Hennawi, J. F., Spergel, D. N.

The number of mass clusters and their distribution in redshift are very sensitive to the density of matter Omega_m and the equation of state of dark energy w. Using weak lens gravitational tomography...