KICP Associate fellow, University of Chicago
kicp.uchicago.eduWWW: Web Site
- Gravitational Lensing
- Gravity of massive objects cause curvature in the space around them. Light rays coming from distant sources are deflected in the vicinity of these objects. This leads to formation of distorted and (de)magnified one or more images of the background sources which is called Gravitational Lensing.
Broadly speaking gravitational lensing has many applications in astronomy like measuring masses of galaxies and galaxy clusters, detecting exo-planets, understanding distribution of matter, evolution of structures in the Universe.
- Strong Lensing Legacy Survey (SL2S)
- This is a survey of gravitational lens systems in a few patches in the sky covering a total area of about 170 sq. deg. We want to compile a sample of lens systems which could then be used to understand properties of galaxies or clusters in a statistical sense.
More specifically, I am using an algorithm to automatically detect gravitational arcs based on their morphology. I have found about 400 lens candidates. Currently, I am compiling and categorising this sample. Statistical properties of such an arcs sample like the image separation distribution or number distribution can serve as powerful probes of matter distribution or abundance of large scale structures like galaxy groups/clusters.
Talks, Lectures, & Workshops
2012 | 2011Latest Journal Publications
- "Cosmological Constraints from a Combination of Galaxy Clustering & Lensing -- II. Fisher Matrix Analysis", arXiv:1207.0004 (Jun 2012)
- "The CFHTLS-Strong Lensing Legacy Survey (SL2S): Investigating the Group-scale Lenses with the SARCS Sample", The Astrophysical Journal, Volume 749, Issue 1, article id. 38 (2012) (Apr 2012)
- "The Galaxy-Dark Matter Connection: A Cosmological Perspective", arXiv:1204.0786 (Apr 2012)
- "Gravitational Lens Candidates in the E-CDFS", The Astrophysical Journal, Volume 734, Issue 1, article id. 69 (2011) (Jun 2011)
- Vikram Dwarkadas, University of Chicago (2012)
- Juan Estrada, Fermilab (2012)
- Rosalind Skelton, Yale University (2012)
- Marcelle Soares-Santos, Fermilab (2012)
- Varun Bhalerao, California Institute of Technology (2011)
- SUDEEP DAS, UC BERKELEY (2011)