About Me

Hi! I am a Postdoctoral Research Associate at the Department of Astrophysical Sciences, Princeton University.  I am a member of the Hyper Suprime-Cam survey, an ongoing optical imaging survey of 1400 deg2 to unprecedented depth.

I was previously an Assistant research Scientists at the Department of Physics & Astronomy at Johns Hopkins University. I was working on CLASH: the Cluster Lensing And Supernova survey with Hubble.

I did my PhD with Dr. Tom Broadhurst and Prof. Yoel Rephaeli at Tel-Aviv University, Tel-Aviv, Israel, studying Clusters of Galaxies by combining multi-band photometry and weak lensing measurements.

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Research Interests

My Main research focuses on weak gravitational lensing by clusters of galaxies. I use observations of these effects to study the two big unknowns of the Universe -- dark matter and dark energy. Read More on my Reasearch page.

Gravitational Lensing

Much like an optical lens in glasses, a massive object, such as a cluster of galaxies, bends the light rays coming from distant galaxies and focuses them. This effect causes both distortion and magnification of galaxy images. By measuring these effects, we can deduce the properties of both the dark and visible matter that caused them.

Galaxy Clusters

Clusters of Galaxies are the largest bound structures in the Universe, containing up to thousands of galaxies, but surprisingly they are comprised mostly of dark matter residing in the halo surrounding the galaxies. The census of clusters provides a very robust tool to understand the cosmological parameters that govern the growth of structure in the Universe. They also make for really nice pictures, and I enjoy staring at them for hours...

Cosmic Structure

The primoridal quantum fluctuations in the early Universe have led to the hierarchical collapse of structure, we now see in the form of a "cosmic web". This web comprises of filaments, sheets, voids, clusters, and superclusters. I like to study how the large scale structure affects the formation and evolution of galaxies and clusters.

Collaborations

CLASH

The cluster Lensing And Supernova survey with Hubble (CLASH) is a survey of 25 massive clusters. Conducted mainly with the Hubble Space Telescop (HST), we complemented it with wide field-of-view observations with the Subrau/Suprime-Cam telescope. I am a core team member of CLASH.

HSC

The Subaru Hyper Suprime-Cam (HSC) survey is an conducting weak-lensing-quality observations of 1,400 square degrees to a magnitude of r~26, making it the best current precursor for LSST. At Princeton, I am a member of HSC, working primarily on cluster and weak lensing science.