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

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

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.

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)

TIGRESS + Bar-driven Inflows top

Collaborators: Sanghyuk Moon, Woong-Tae Kim

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

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.