본문 바로가기 메뉴바로가기

Inferring the astrophysics of reionization and cosmic dawn from galaxy luminosity functions and the 21-cm signal

2018-08-01
  • Speaker : Dr. Jaehong Park (Scuola Normale Superiore)
  • Date : 2018-08-29 14:00 ~ 15:00
  • Location : JYS331-2
  • Host : Se-Heon Oh

The properties of unseen first galaxies in our Universe are encoded in the 3D structure of the cosmic 21-cm signal. Here I introduce a flexible parametrization for high-z galaxies’ properties, including their star formation rates, ionizing escape fraction and their evolution with the mass of the host dark matter halos. With this parametrization, I self-consistently calculate the corresponding 21-cm signal during reionization and the cosmic dawn. Using a Monte Carlo Markov Chain sampler of 3D simulations, 21CMMC, I demonstrate how combining high-z luminosity functions with a mock 21-cm signal improve the parameter recovery. In our model, the turn-over magnitude on high-z luminosity functions can be constrained using the 21-cm signal.

만족도 조사
콘텐츠 담당부서이론천문센터
콘텐츠 만족도