getTrkSet: Import a set of data

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

Import a set of data

Description

Import a set of stellar evolutionary tracks from pre-main sequence to He flash, or a set of isochrones.

Usage

 getTrkSet(m, z, y, ml, afe,
             baseURL="ftp://cdsarc.u-strasbg.fr/pub/cats/J/A+A/540/A26/")
 getIsoSet(age, z, y, ml, afe,
             baseURL="ftp://cdsarc.u-strasbg.fr/pub/cats/J/A+A/540/A26/")
     

Arguments

m	a vector of masses, in unit of solar mass, of the models to get. 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.
age	a vector of ages, in Gyr, of the models to get. Allowed values are 8.0, 8.5, 9.0, 9.5, 10.0, 10.5, 11.0, 11.5, 12.0, 12.5, 13.0, 13.5, 14.0, 14.5, 15.0.
z	a vector of the initial metallicity of the models to get. Allowed values are 0.0001, 0.0002, 0.0003, 0.0004, 0.0005, 0.0006, 0.0007, 0.0008, 0.0009, 0.001, 0.002, 0.003, 0.004, 0.005, 0.006, 0.007, 0.008, 0.009, 0.01.
y	a vector of the initial helium abundance of the models to get. Allowed values are 0.25, 0.27, 0.33, 0.38, 0.42.
ml	a vector of the mixing-length of the models to get. Allowed values are 1.7, 1.8, 1.9.
afe	the alpha-enhanchment of the models to get. It can be one of afe = 0 for [alpha/Fe] = 0.0 or afe = 1 for [alpha/Fe] = 0.3.
baseURL	the URL of the base directory of the database from where get the models.

Details

As a sanity check, the function performs a consistency test on the parameters z, y, ml, afe by a call to testComposition.

By default the function requires an Internet access for data gathering. Tracks and isochrones are downloaded from the on-line repository CDS (http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/540/A26). It is also possible to gather data from a local download of the catalog, specifying as baseURL the root directory of the download. In this case the structure of the catalog and the names of files and directory must be preserved.

Value

getTrkSet returns an object of class trkset, i.e. a list of objects of class trk. getIsoSet returns an object of class isoset, i.e. a list of objects of class iso.

print, and plot methods are available for the two classes.

If baseURL points to an invalid path or CDS ftp site is unavailable the function returns NA and issues a warning.

References

M. Dell'Omodarme, G. Valle, S. Degl'Innocenti, and P.G. Prada Moroni (2012). The Pisa Stellar Evolution Data Base for low-mass stars. Astronomy and Astrophysics, 540, A26.

See Also

getZahb, getHbgrid, getHb, getIso.

Examples

  ## Not run: 
  ### get two masses
  trkset <- getTrkSet(c(0.9, 1.0), 0.002, 0.25, 1.7, 0)

  ### get two masses at two metallicity, for a total of 4 objects
  trkset <- getTrkSet(c(0.9, 1.0), c(0.002, 0.01), 0.25, 1.7, 0)

  ### get data from local directory /data
  set <- getTrkSet(0.9, 0.002, c(0.25, 0.33), 1.7, 0, baseURL="/data/")
## End(Not run)

stellaR documentation built on April 11, 2022, 5:09 p.m.