TIGRESS top

• Paper

TIGRESS models the star-forming interstellar medium in a local patch of galactic disks

TIGRESS builds on the Athena MHD code package with additional physical modules including:

• sink/star particles (see Gong & Ostriker 2013)
  • SN rates and FUV luminosity as a function of cluster age and mass, based on STARBURST99
• supernova feedback (see also Kim & Ostriker 2015)
  • 2/3 of SNe occur in binary OB stars (1/3 are runaways)
  • secondary OB stars are ejected with the exponential velocity distribution for 20km/s < v < 200km/s with a characteristic velocity of v₀=50km/s (motivated by Figure 2 in Eldridge+ 2011)
• optically thin cooling (tabulated, solar metallicity) (see Koyama & Inutsuka 2002 and Sutherland & Dopita 1993)
• time-dependent photoelectric heating due to FUV radiation from young stars

TIGRESS adopts the following configuration with the ideal MHD solver --with-gas=mhd:

• the van Leer integrator --with-integrator=vl
• 2nd order (piecewise linear) interpolation --with-order=2p
• Roe's Riemann solver and H-correction --with-flux=roe --enable-h-correction
• first-order flux correction (see Appendix in Lemaster & Stone 2009) --enable-fofc

TIGRESS utilizes Athena's additional features including

• shearing Box --enable-shearing-box
• self-gravity solver using the FFT method (adopt Nicole Lemaster's implementation of Plimpton's parallel FFT) --with-gravity=fft_disk --enable-fft
  • shearing-periodic BCs in the horizontal directions
  • vacuum BCs in the vertical direction

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TIGRESS + Non-equilibrium Cooling and Radiation (TIGRESS-NCR) top

• TIGRESS-NCR
• NCR method
• ART
• Chemistry

Collaborators: Jeong-Gyu Kim, Munan Gong

TIGRESS-NCR couples the basic TIGRESS framework with direct UV radiation transfer (solved using adaptive ray tracing) and photochemistry network to follow time-dependent H abundances and steady-state abundances of major coolants and set cooling and heating rate self-consistently.

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TIGRESS + Spiral Arms top

• Paper

Collaborator: Woong-Tae Kim

TIGRESS in a Cartesian box that is corotating with a local segment of a stellar spiral arm -- tilted local frame with a sinusoidal gravitational potential (Roberts 1969)

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TIGRESS + Bar-driven Inflows top

• Paper I
• Paper II

Collaborators: Sanghyuk Moon, Woong-Tae Kim

TIGRESS in a center of galaxies with inflows through narrow nozzles micking bar-driven gas inflows.

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TIGRESS + Intra Cluster Medium top

• Paper

Collaborators: Woorak Choi, Aeree Chung

TIGRESS interacting with an ICM wind blown from the bottom of the simulation domain to model ram pressure stripping of galaxies in cluster enviroments.