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Daniel Whalen (ICG), The First Quasars in the Universe

January 13, 2021 By Daniel Whalen


Event Details

  • Date: January 14, 2021 2:30 pm – 3:30 pm
  • Categories: Seminar

Although most massive galaxies harbor supermassive black holes (SMBHs) today, over 300 quasars have now been found at z > 6, less than a Gyr after the Big Bang (with seven at z > 7).  How such massive BHs formed by such early epochs poses significant challenges to current paradigms of early structure formation.  I will review current thought on the origins of primordial quasars and present new numerical simulations demonstrating how a 2 billion solar mass BH can form by z ~ 7.  I will also discuss synthetic observables for the first quasars in the NIR and radio for each stage of their evolution: birth as a supermassive primordial star, collapse to a DCBH, and subsequent growth to 10^9 Msun in cold accretion flows.  Our calculations show that Euclid and JWST will inaugurate the era of z ~ 5 – 15 quasar astronomy in the coming decade.


Event Details

  • Date: January 14, 2021 2:30 pm – 3:30 pm
  • Categories: Seminar

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Coming up

  • Anut Sangka on January 19, 2021 12:00 pm
  • Wentao Luo (IPMU, Japan) on January 20, 2021 1:00 pm
  • Galaxy breakfast on January 21, 2021 12:00 pm
  • Kate Maguire (TCD), TBA on January 21, 2021 2:30 pm
  • Science Chat on January 22, 2021 11:00 am

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