Open Access

Table 1

APE input parameters.

Name Unit Description Main impact on the model Recommended range
Grid parameters
loggrid Boolean Logarithmic grid or linear Spatial resolution .true. – .false.
rad_min_au au Innermost cell radius Spatial resolution 0.1–100
rad_max_au au Outermost cell radius Simulated region size 50–10 000
nrad Integer Number of radial cells Spatial resolution 10–1000
theta_min_deg degrees Minimum polar angle Simulated region size 0–89
theta_max_deg degrees Maximum polar angle Simulated region size 1–90
ntheta Integer Number of polar cells Polar resolution 10–100
radmc_output Boolean Produce RADMC-3D-ready inputs None .true. – .false.
snapshot_nautilus Boolean Produce Nautilus-ready inputs on a snapshot None .true. – .false.
nautilus_time_kyr kyr Duration of the nautilus simulation None 0–20
Model parameters
Mass M Mass of the Bonnor–Ebert sphere Envelope density, tff 0.2–8
time_years years Time after the start of the collapse Envelope, star and disk 0–2tff (~ 3 × 105)
t_pstar_age Boolean Is time_years the age of the central object a Same as time_years .true. – .false.
temp_mol_cloud K Temperature of the surround molecular cloud Temperature in the system 5–30
masstoflux None Mass to flux ratio (∝1/B) Disk size 1−∞
coagulation Boolean Enable estimation of dust growth Radiative transfer .true. – .false.
dust_to_gas None Desired dust-to-gas mass ratio Radiative transfer 0.001–0.1
alphadisk None α-disk parameter Disk scale height 0.0001–0.1
disk_cutoff Boolean If true., uses a sharp cut-off of the disk Disk profile .true. – .false.
use_radmc_temp Boolean If true. use RADMC-3D temperature Gas temperature .true. – .false.
Particle parameters
x_ini, z_ini au Initial x (cylindrical radius) and Z coordinates Particle trajectory 0–20 000
tmax years Maximum time for the particle evolution None 0−∞
dt0 years Maximum allowed time-step Trajectory accuracy 1–1000
dyn_fact None Time-step limitation near box edges Trajectory accuracy 100–1000
Omega0 rad s−1 Angular velocity of the cloud Envelope rotation 10−15−10−12
cloud_extinction mag Visual extinction of the surrounding cloud Chemical post-processing 0−∞
Reverse Boolean Compute particle trajectories backward in time None .true–.false.

Notes. a By default, the parameter time_years represents the time after the start of the collapse of the initial Bonnor-Ebert sphere. However, the user may find more convenient to choose directly a time after the formation of the central object. This can be done by adding tff to the desired age for the central object, but setting the parameter t_pstar_age to .true. does this automatically. In that case, the parameter time_years then represents the time after the formation of the central object.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.