interpTrk: Interpolate stellar tracks data

In stellaR: Evolutionary Tracks and Isochrones from Pisa Stellar Evolution Database

Interpolate stellar tracks data

Description

Construct a set of interpolated tracks from the objects in the database.

Usage

 interpTrk(z, y, ml, afe, vmass=seq(0.30,1.10, by=0.05),
           baseURL="ftp://cdsarc.u-strasbg.fr/pub/cats/J/A+A/540/A26/")
     

Arguments

z	the initial metallicity of the models to generate. Allowed values are between 0.0001 and 0.01.
y	the initial helium abundance of the models to generate. Allowed values are between 0.25 and 0.42.
ml	the mixing-length of the model to generate. Allowed values are between 1.7 and 1.9.
afe	the alpha-enhanchment of the model to get. It can be one of afe = 0 for [alpha/Fe] = 0.0 or afe = 1 for [alpha/Fe] = 0.3.
vmass	vector of masses of the stellar model to generate. Default to the whole set in the database. Allowed values are 0.30, 0.35, 0.40, 0.45, 0.50, 0.55, 0.60, 0.65, 0.70, 0.75, 0.80, 0.85, 0.90, 0.95, 1.00, 1.05, 1.10.
baseURL	the URL of the base directory of the database from where get the models.

Details

A 3D interpolation is performed on the database to construct the required set of tracks. Interpolation on helium abundance and on mixing-length occur linearly on the variables, while the metallicity is log-transformed before the interpolation procedure.

Value

The function returns an object of class trkset containing the interpolated tracks.

Examples

  ### slow!
  ## Not run:  
  iptrk <- interpTrk(0.002, 0.25, 1.74, 0)

  ### get data from local directory /data
  iptrk <- interpTrk(0.002, 0.25, 1.74, 0, baseURL="/data/")
## End(Not run)

stellaR documentation built on April 11, 2025, 6:12 p.m.