Free access
Issue
Astron. Astrophys. Suppl. Ser.
Volume 118, Number 3, September 1996
Page(s) 595 - 603
DOI http://dx.doi.org/10.1051/aas:1996222
Spectroscopy made easy: A new tool for fitting observations with synthetic spectra DOI: 10.1051/aas:1996222

Astronomy and Astrophysics Supplement Series, Vol. 118, September 1996, 595-603

Spectroscopy made easy: A new tool for fitting observations with synthetic spectra

J.A. Valenti and N. Piskunov

Send offprint requests to: J.A. Valenti

JILA, University of Colorado, Boulder, Colorado 80309--0440, U.S.A.
Astronomical Observatory of Uppsala University, Box 515, S--751 20 Uppsala, Sweden

Received November 22; accepted January 19, 1996

Abstract:

We describe a new software package that may be used to determine stellar and atomic parameters by matching observed spectra with synthetic spectra generated from parameterized atmospheres. A nonlinear least squares algorithm is used to solve for any subset of allowed parameters, which include atomic data ( and van der Waals damping constants), model atmosphere specifications ( , ), elemental abundances, and radial, turbulent, and rotational velocities. LTE synthesis software handles discontiguous spectral intervals and complex atomic blends. As a demonstration, we fit 26 FeI lines in the NSO Solar Atlas (Kurucz et al. 1984), determining various solar and atomic parameters.

Key words: radiative transfer --- methods: numerical --- techniques: spectroscopic --- stars: fundamental parameters --- sun: fundamental parameters --- atomic data


Copyright EDP Sciences
web@edpsciences.com

What is OpenURL?

The OpenURL standard is a protocol for transmission of metadata describing the resource that you wish to access.

An OpenURL link contains article metadata and directs it to the OpenURL server of your choice. The OpenURL server can provide access to the resource and also offer complementary services (specific search engine, export of references...). The OpenURL link can be generated by different means.

  • If your librarian has set up your subscription with an OpenURL resolver, OpenURL links appear automatically on the abstract pages.
  • You can define your own OpenURL resolver with your EDPS Account.
    In this case your choice will be given priority over that of your library.
  • You can use an add-on for your browser (Firefox or I.E.) to display OpenURL links on a page (see http://www.openly.com/openurlref/). You should disable this module if you wish to use the OpenURL server that you or your library have defined.