2011/05/02 by Rogério Riffel, Tibério Borges Vale · 1 citation
Physics and Astronomy · #Algorithm #Astronomy and Astrophysical Research #Astrophysics #Computation #Computational physics #Computer science #Cosmology #Emission spectrum #Equivalent width #Galaxies: Formation, Evolution, Phenomena #Perl #Physics #Population #Quantum mechanics #Spectral line #Stellar, planetary, and galactic studies #astro-ph.IM
paper · pdf · doi:10.1007/s10509-011-0731-9
8 pages, 5 figures, accepted by Astrophysics and Space Science
arxiv created 2011/05/02 · openalex publication_date 2011/05/31 · arxiv updated 2015/05/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We present Perl Algorithm to Compute continuum and Equivalent Widths (pacce). We describe the methods used in the computations and the requirements for its usage. We compare the measurements made with pacce and "manual" ones made using iraf splot task. These tests show that for SSP models the equivalent widths strengths are very similar (differences <0.2A) for both measurements. In real stellar spectra, the correlation between both values is still very good, but with differences of up to 0.5A. pacce is also able to determine mean continuum and continuum at line center values, which are helpful in stellar population studies. In addition, it is also able to compute the uncertainties in the equivalent widths using photon statistics. The code is made available for the community through the web at http://www.if.ufrgs.br/~riffel/software.html.