ASIAA TIARA, Theoretical Institute for Advanced Research in Astrophysics
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Research Highlights

TIARA is the Theory Group in ASIAA. The mission of the Theory Group is to conduct an integrated, world class research in theoretical and computational astrophysics in ASIAA and in Taiwan. The research areas mainly cover the following three topics, leading to the understanding of the structure formation and its feedback on various scales in the Universe:

  1. Star and Planet Formation;
  2. Galaxy Formation and Cosmology;
  3. High Energy Astrophysics.

Star and Planet Formation

We approach star and planet formation through numerical simulations of magnetized gravitational collapse of molecular clouds and cores, numerical and analytical modeling of dynamics in protoplanetary disks, and meteoritic studies of origin and evolution of the solar system.

Dynamics of Protoplanetary Disk Dynamics of Protoplanetary Disk
Footprints of planet formation. Interaction between a low mass protoplanet and its dusty protoplanetary disk. ...(more)
Formation of chondrite meteorite parent body Formation of chondrite meteorite parent body
The evolution paths of aggregates are plotted in the mass-density diagram. ...(more)

Galaxy Formation and Cosmology

We are aiming at clarifying the multi-scale physics regarding the cosmological structure formation: large-scale effects of dark energy, spatial structures of dark matter distribution, galaxy formation and evolution, dust and chemical enrichment in galaxies, and stellar feedback through supernova explosions.

Hydrodynamical evolution of supernovae and its effect on galaxy evolution Hydrodynamical evolution of supernovae and its effect on galaxy evolution
How First Supernovae Altered Early Star Formation? ...(more)
Simulation of dust and molecules in a disk galaxy Simulation of dust and molecules in a disk galaxy
Distribution of molecular gas surface density ...(more)
Dust enrichment in a cosmic volume Dust enrichment in a cosmic volume
Cosmological simulation with dust formation and destruction ...(more)
Dark matter distribution from the analysis of density and velocity fields Dark matter distribution from the analysis of density and velocity fields
The figure shows the constraints on physical boundaries of dark matter halos, known as splashback radii, from the density and velocity fields, respectively shown in the horizontal and vertical axes. ...(more)
Theoretical modeling of large-scale galaxy distribution for a test of cosmic acceleration Theoretical modeling of large-scale galaxy distribution for a test of cosmic acceleration
The black solid line is the quadrupole moment of the galaxy power spectrum (the suppression of the power on small scales is due to virial motions of satellite galaxies) and ...(more)

High Energy Astrophysics

We are also aiming at revealing high-energy phenomena related to black holes and compact objects, since energy input (feedback) from these objects could affect the structure formation on various scales.

Lightning black holes in dense molecular clouds Lightning black holes in dense molecular clouds
(A) Side view of a BH magnetosphere. Photons are emitted from infrared to soft gamma-ray energies by the hot gas falling toward the BH in the equatorial, accretion (cyan) region. ...(more)
Self-consistent GRMHD Simulations with Steady Axisymmetric Force-free Jet Self-consistent GRMHD Simulations with Steady Axisymmetric Force-free Jet
Quasi-steady funnel jets are obtained in GRMHD simulations up to the scale of ∼ 100 gravitational radius (r_g) for various black hole (BH) spins. The funnel edge is approximately determined ...(more)