Astronomy & Astrophysics Seminar: Probing the Universe’s First Billion Years with Hydrogen 21-cm radiation

Dr. Raghunath Ghara, Open University

07 June 2023, 14:00 
Shenkar Physics Building, Holcblat Hall 007 
Astronomy & Astrophysics Seminar




The redshifted 21-cm signal from the intergalactic medium (IGM) neutral hydrogen is the most promising probe of the Epoch of Reionization.  It has the ability to reveal many unknown facts about this epoch such as properties of the early sources of radiation, thermal and ionization states of the IGM. Radio telescopes such as LOFAR, MWA, and HERA are providing stronger upper limits on the 21-cm power spectrum.  I will be talking about this probe and how these measurements are used to infer the states of the IGM as well as the properties of the first sources that formed during that period.



Seminar Organizer: Prof. Dan Maoz

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