Modeling Cosmic Evolution with JET: A Semi-Analytical Framework to Black Hole and Jet Evolution

The history of astronomy is a history of receding horizons.
Edwin Hubble

Understanding the co-evolution of galaxies, black holes, and their jets across cosmic time is a fundamental challenge in modern astrophysics. JET (Jet from Early Times) is a semi-analytical cosmological model designed to track the hierarchical assembly of dark matter structures and compute the associated gas dynamics, black hole growth, and jet activity. A tutorial will be held by the Center of Astronomy and Gravitation (CAG) at NTNU at March 26, 2025 for this semi-analytical approach.

In this tutorial, we will provide an in-depth introduction to the physics behind JET, its applications in modeling galaxy and AGN evolution, and its potential implications for astroparticle physics. Join us for an illuminating journey into the cosmos with the JET !

Date: Wednesday 3/26

Location:

2F General Building, National Taiwan Normal University, Gongguan Campus

(the 1st building on the left after you enter the campus [map])

program

Morning – model description: physics and applications

10:00 – 10:30 – The structure of cosmological model and JET (Olmo Piana, NTNU)

merger trees
dark matter
gas accretion

10:30 – 11:00 – Baryonic physics (Olmo Piana, NTNU)

metallicity evolution
star formation and feedback
black hole growth and feedback
jet launching model

11:00 – 11:15 – Break

11:15 – 12:15 – Tests and applications (Olmo Piana, NTNU)

stellar and black hole mass density
stellar and black hole mass functions
galaxy and AGN luminosity functions
jet number densities
Applications of the model for SMBH growth and astroparticle physics

12:15 – 12:30 – Q&A.

12:30 – 13:30 – Lunch

Afternoon – code tutorial and discussion

13:30 – 14:45 – Code tutorial (Andrew Cooper, NTHU/Olmo Piana, NTNU)

Introduction to an updated version of the merger tree generator algorithm found in Parkinson et al. 2008 (Andrew Cooper, NTHU).
Introduction to the JET code. Test run of the code for one single halo merger tree (Olmo Piana, NTNU)

14:45-15:00 – Break.

15:00-16:20 – Code tutorial and Discussion, Closing Remarks

Test run of the code for one single halo merger tree (continue)
Joint discussion about JET approximations and future improvements, possible improvement with inputs from numerical simulations, potential projects and collaborations

LOC: Hung-Yi Pu, Olmo Piana, Guan-Hong Li

*The workshop is sponsored by Department of Physics, National Taiwan Normal University, and Yusan Young Scholar program, the Ministry of Education (MOE) in Taiwan.