CORRELATION ANALYSIS OF A LARGE SAMPLE OF NARROW-LINE SEYFERT 1 GALAXIES: LINKING CENTRAL ENGINE AND HOST PROPERTIES

Journal Article · Sun Apr 15 04:00:00 EDT 2012 · Astronomical Journal (New York, N.Y. Online)

DOI:https://doi.org/10.1088/0004-6256/143/4/83· OSTI ID:22034676

Dawei, Xu; Komossa, S; Jing, Wang; Weimin, Yuan ^[1]; Hongyan, Zhou; Honglin, Lu ^[2]; Cheng, Li ^[3]; Grupe, Dirk ^[4]

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1. National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Beijing 100012 (China)
2. Key Laboratory for Research in Galaxies and Cosmology, University of Sciences and Technology of China, Chinese Academy of Sciences, 96 JinZhai Road, Hefei 230026 (China)
3. Partner Group of the MPI fuer Astrophysik at Shanghai Astronomical Observatory, Key Laboratory for Research in Galaxies and Cosmology of Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030 (China)
4. Department of Astronomy and Astrophysics, Pennsylvania State University, 525 Davey Lab, University Park, PA 16802 (United States)

We present a statistical study of a large, homogeneously analyzed sample of narrow-line Seyfert 1 (NLS1) galaxies, accompanied by a comparison sample of broad-line Seyfert 1 (BLS1) galaxies. Optical emission-line and continuum properties are subjected to correlation analyses, in order to identify the main drivers of the correlation space of active galactic nuclei (AGNs), and of NLS1 galaxies in particular. For the first time, we have established the density of the narrow-line region as a key parameter in Eigenvector 1 space, as important as the Eddington ratio L/L{sub Edd}. This is important because it links the properties of the central engine with the properties of the host galaxy, i.e., the interstellar medium (ISM). We also confirm previously found correlations involving the line width of H{beta} and the strength of the Fe II and [O III] {lambda}5007 emission lines, and we confirm the important role played by L/L{sub Edd} in driving the properties of NLS1 galaxies. A spatial correlation analysis shows that large-scale environments of the BLS1 and NLS1 galaxies of our sample are similar. If mergers are rare in our sample, accretion-driven winds, on the one hand, or bar-driven inflows, on the other hand, may account for the strong dependence of Eigenvector 1 on ISM density.

• OSTI ID: 22034676
• Journal Information: Astronomical Journal (New York, N.Y. Online), Journal Name: Astronomical Journal (New York, N.Y. Online) Journal Issue: 4 Vol. 143; ISSN 1538-3881
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ASTRONOMY
ASTROPHYSICS
COMPARATIVE EVALUATIONS
CORRELATIONS
DENSITY
EIGENVECTORS
GALAXY NUCLEI
HYDROGEN
IRON IONS
LINE WIDTHS
OXYGEN IONS
PHOTON EMISSION
QUASARS
SEYFERT GALAXIES
STAR ACCRETION