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Past Colloquia

Title              :

Cosmic Neutral Hydrogen as a Probe of the First Stars in the Universe

Speaker         : Prof. Tirthankar RoyChoudhury, NCRA, TIFR, Pune
Date                : March 09, 2016
Time               : 4:00 PM
Venue            : Lecture Hall-1
Abstract        :

One of the most promising ways of probing the first stars in the Universe is through their signatures on the hydrogen distribution. It is now well understood that the ultra-violet photons from these stars photoionize the hydrogen atoms in the surrounding medium, a process known as \"reionization\". Detecting reionization thus can be quite useful in probing the Universe at very early times. In this talk we will review the current status of the observational probes related to reionization along with the progress in theoretical modelling. We will also discuss the future plans for detecting signatures of the first stars, highlighting some our recent results on these issues.



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