Bibcode
Allende Prieto, Carlos
Referencia bibliográfica
Monthly Notice of the Royal Astronomical Society, Volume 339, Issue 4, pp. 1111-1116.
Advertised on:
3
2003
Número de citas
14
Número de citas referidas
11
Descripción
Analyses of stellar spectra often begin with the determination of a
number of parameters that define a model atmosphere. This work presents
a prototype for an automated spectral classification system that uses a
150-Å-wide region around Hβ, and applies to stars of spectral
types A-K with normal (scaled solar) chemical composition. The new tool
exploits synthetic spectra based on plane-parallel flux-constant model
atmospheres. The input data are high signal-to-noise ratio spectra with
a resolution greater than approximately 1 Å. The output parameters
are forced to agree with an external scale of effective temperatures,
based on the infrared flux method. The system is fast - a spectrum is
classified in a few seconds - and well suited for implementation on a
web server. We estimate upper limits to the 1σ random error in the
retrieved effective temperatures, surface gravities and metallicities as
100 K, 0.3 and 0.1 dex, respectively.