scholarly journals TWO-COMPONENT STRUCTURE OF THE Hβ BROAD-LINE REGION IN QUASARS. I. EVIDENCE FROM SPECTRAL PRINCIPAL COMPONENT ANALYSIS

2012 ◽  
Vol 760 (2) ◽  
pp. 126 ◽  
Author(s):  
Chen Hu ◽  
Jian-Min Wang ◽  
Luis C. Ho ◽  
Gary J. Ferland ◽  
Jack A. Baldwin ◽  
...  
Keyword(s):  
Principal Component Analysis ◽  
Principal Component ◽  
Component Analysis ◽  
Broad Line ◽  
Component Structure ◽  
Broad Line Region ◽  
Line Region ◽  
Two Component ◽  
Spectral Principal Component Analysis

Hints on the Broad Line Region Structure of Quasars at High and Low Luminosities

2011 ◽  
Vol 20 (3) ◽  
Author(s):  
Paola Marziani ◽  
Jack W. Sulentic ◽  
Sebastian Zamfir ◽  
C. A. Negrete ◽  
Deborah Dultzin
Keyword(s):  
Principal Component Analysis ◽  
Spectral Properties ◽  
Principal Component ◽  
Component Analysis ◽  
Broad Line ◽  
High Luminosity ◽  
Broad Line Region ◽  
Large Samples ◽  
Quasar Spectra ◽  
Line Region

AbstractQuasars show a considerable spectroscopic diversity. However, the variety of quasar spectra at low redshifts is non-random: a principal component analysis applied to large samples customarily identifies two main eigenvectors. In this contribution we show that the range of quasar optical spectral properties observed at low-z and associated with the first eigenvector is preserved up to z ≈ 2 in a sample of high luminosity quasars. We also describe two major luminosity effects.

scholarly journals Spectral principal component analysis of mid-infrared spectra of a sample of PG QSOs

2016 ◽  
Vol 456 (4) ◽  
pp. 4081-4088 ◽  
Author(s):  
Wei-Hao Bian ◽  
Zhi-Cheng He ◽  
Richard Green ◽  
Yong Shi ◽  
Xue Ge ◽  
...  
Keyword(s):  
Principal Component Analysis ◽  
Infrared Spectra ◽  
Principal Component ◽  
Component Analysis ◽  
Mid Infrared ◽  
Spectral Principal Component Analysis

scholarly journals Accretion in the broad line region of active galactic nuclei

2006 ◽  
Vol 2 (S238) ◽  
pp. 329-330
Author(s):  
E. Bon ◽  
L. Č. Popović ◽  
D. Ilić
Keyword(s):  
Active Galactic Nuclei ◽  
Galactic Nuclei ◽  
Emission Lines ◽  
Broad Line ◽  
Line Profiles ◽  
Spherical Region ◽  
Broad Line Region ◽  
Broad Emission ◽  
Line Region ◽  
Two Component

AbstractWe modeled the single-peaked Broad Emission Lines (BELs) with two-component model (accretion disk, with surrounding spherical region), comparing it with observational line profiles for a number of Active Galactic Nuclei (AGN). We find that the accretion in the Broad Line Region (BLR) can be present even if the profiles of BELs are single-peaked.

Stratification in the broad line region of AGN: The two-component model

2006 ◽  
Vol 50 (9-10) ◽  
pp. 716-719 ◽  
Author(s):  
E. Bon ◽  
L.Č. Popović ◽  
D. Ilić ◽  
E. Mediavilla
Keyword(s):  
Component Model ◽  
Broad Line ◽  
Broad Line Region ◽  
Line Region ◽  
Two Component

A novel approach for EIT regularization via spatial and spectral principal component analysis

2007 ◽  
Vol 28 (9) ◽  
pp. 1001-1016 ◽  
Author(s):  
Mehran Goharian ◽  
Mark-John Bruwer ◽  
Aravinthan Jegatheesan ◽  
Gerald R Moran ◽  
John F MacGregor
Keyword(s):  
Principal Component Analysis ◽  
Principal Component ◽  
Component Analysis ◽  
Novel Approach ◽  
Spectral Principal Component Analysis
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