TARDIS Example Configuration

The simple and fast TARDIS setup is provided by tardis_example.yml which may be obtained here. We suggest every new user of TARDIS to run this setup first, which can be done using the quickstart guide.

It calculates a spectrum for a Type Ia supernova model 13 days after explosion, requesting a total output luminosity of

\[L = 10^{9.44}\, \mathrm{L}_{\odot}\]

A simple power-law density profile (seventh order polynomial fit to the Nomoto et al. 1984 W7 model) is used together with a uniform composition, involving only six elements. To avoid long run times only a moderate number of real and virtual Monte Carlo packets are used. Also, very simple ionization and excitation assumptions are adopted.

The following YAML file summarizes the tardis_example setup:

# Example YAML configuration for TARDIS
tardis_config_version: v1.0

supernova:
  luminosity_requested: 9.44 log_lsun
  time_explosion: 13 day

atom_data: kurucz_cd23_chianti_H_He.h5

model:
  structure:
    type: specific
    velocity:
      start: 1.1e4 km/s
      stop: 20000 km/s
      num: 20
    density:
      type: branch85_w7

  abundances:
    type: uniform
    O: 0.19
    Mg: 0.03
    Si: 0.52
    S: 0.19
    Ar: 0.04
    Ca: 0.03

plasma:
  disable_electron_scattering: no
  ionization: lte
  excitation: lte
  radiative_rates_type: dilute-blackbody
  line_interaction_type: macroatom

montecarlo:
  seed: 23111963
  no_of_packets: 4.0e+4
  iterations: 20
  nthreads: 1

  last_no_of_packets: 1.e+5
  no_of_virtual_packets: 10

  convergence_strategy:
    type: damped
    damping_constant: 1.0
    threshold: 0.05
    fraction: 0.8
    hold_iterations: 3
    t_inner:
      damping_constant: 0.5

spectrum:
  start: 500 angstrom
  stop: 20000 angstrom
  num: 10000

Note

Due to the low number of packets, the simplistic ionization and excitation treatments and the reduced abundance set, this TARDIS setup serves for illustrative purposes and not for detailed SNe Ia spectral synthesis calculations.