Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2011-10-09
The Astronomical Journal, Volume 141, Issue 4, 133 (2011)
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
38 pages, 20 figures
Scientific paper
10.1088/0004-6256/141/4/133
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.
Budavari Tamas
Charlot Stephane
Csabai István
Győry Zsuzsanna
Szalay Alexander S.
No associations
LandOfFree
Correlations between Nebular Emission and the Continuum Spectral Shape in SDSS Galaxies 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 Correlations between Nebular Emission and the Continuum Spectral Shape in SDSS Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Correlations between Nebular Emission and the Continuum Spectral Shape in SDSS Galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-88496