Skip to Main content Skip to Navigation
Journal articles

Correlations between Nebular Emission and the Continuum Spectral Shape in SDSS Galaxies

Abstract : We present a statistical study of the correlations and dimensionality of emission lines carried out on a sample of over 40,000 Sloan Digital Sky Survey (SDSS) galaxies. Using principal component analysis, we found that the equivalent widths of the 11 strongest lines can be well represented using three parameters. We also explore correlations of the emission pattern with the eigenspace representation of the continuum spectrum. The observed relations are used to provide an empirical prescription for expectation values and variances of emission-line strengths as a function of spectral shape. We show that this estimation of emission lines has a sufficient accuracy to make it suitable for photometric applications. The method has already proved useful in SDSS photometric redshift estimation.
Document type :
Journal articles
Complete list of metadata

https://hal-insu.archives-ouvertes.fr/insu-03646013
Contributor : Hal Sorbonne Université Gestionnaire Connect in order to contact the contributor
Submitted on : Tuesday, April 19, 2022 - 4:26:15 PM
Last modification on : Wednesday, April 20, 2022 - 3:40:05 AM

Links full text

Identifiers

Citation

Zsuzsanna Győry, Alexander S. Szalay, Tamás Budavári, István Csabai, Stéphane Charlot. Correlations between Nebular Emission and the Continuum Spectral Shape in SDSS Galaxies. The Astronomical Journal, 2011, 141, ⟨10.1088/0004-6256/141/4/133⟩. ⟨insu-03646013⟩

Share

Metrics

Record views

3