Work

Introduction to Principal Components Analysis

Year: 1999

Type: preprint

Abstract: Understanding the inverse equivalent width - luminosity relationship (Baldwin Effect), the topic of this meeting, requires extracting information on continuum and emission line parameters from samples of AGN. We wish to discover whether, and how, different subsets of measured parameters may correlate with each other. This general problem is the domain of Principal Components Analysis (PCA). We discuss the purpose, principles, and the interpretation of PCA, using some examples from QSO spectroscopy. The hope is that identification of relationships among subsets of correlated variables may lead to new physical insight.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.astro-ph/9905079

Authors: Francis, Paul J., Wills, Beverley J.

Institutions: Australian National University, McDonald Observatory, The University of Texas at Austin

Language: English

Topic: Galaxies: Formation, Evolution, Phenomena

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Aeronautics and Space Administration, Space Telescope Science Institute, Lawrence Livermore National Laboratory

Awards: G433322167, G58316358, G6273510985

OpenAlex ID: W1591488351

Cites: 1

Cited by: 16

Related to: 20