Generating on-the-fly large samples of theoretical spectra through N-dimensional grid

Details Generating on-the-fly large samples of theoretical spectra through N-dimensional grid Generating on-the-fly large samples of theoretical spectra through N-dimensional grid

2009-11-06

arxiv.org/abs/0911.1280v1

Astronomy and Astrophysics

Astrophysics

Instrumentation and Methods for Astrophysics

7 pages, 5 figures, 1 table. Accepted for publication in AJ

Scientific paper

Many analyses and parameter estimations undertaken in astronomy require a large set (> 10^5) of non-analytical, theoretical spectra, each of these defined by multiple parameters. We describe the construction of an N-dimensional grid which is suitable for generating such spectra. The theoretical spectra are designed to correspond to a targeted parameter grid but otherwise to random positions in the parameter space, and they are interpolated on-the-fly through a pre-calculated grid of spectra. The initial grid is designed to be relatively low in parameter resolution and small in occupied hard disk space and therefore can be updated efficiently when a new model is desired. In a pilot study of stellar population synthesis of galaxies, the mean square errors on the estimated parameters are found to decrease with the targeted grid resolution. This scheme of generating a large model grid is general for other areas of studies, particularly if they are based on multi-dimensional parameter space and are focused on contrasting model differences.

Affiliated with

Also associated with

No associations

Rating

Generating on-the-fly large samples of theoretical spectra through N-dimensional grid does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Generating on-the-fly large samples of theoretical spectra through N-dimensional grid, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Generating on-the-fly large samples of theoretical spectra through N-dimensional grid will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-391645