Narrow Line Seyfert 1 Galaxies and the Evolution of Galaxies and Active Galaxies

By S. Mathur. 2000

244 citations recorded by the source corpus.

Narrow Line Seyfert 1 galaxies (NLS1s) are intriguing owing to their continuum as well as emission-line properties. The observed peculiar properties of the NLS1s are believed to be as a result of an accretion rate close to the Eddington limit. As a consequence of this, for a given luminosity, NLS1s have smaller black hole (BH) masses compared with normal Seyfert galaxies. Here we argue that NLS1s might be Seyfert galaxies in their early stage of evolution and as such may be low-redshift, low-luminosity analogues of high-redshift quasars. We propose that NLS1s may reside in rejuvenated, gas-rich galaxies. We also argue in favour of collisional ionization for production of Fe ii in active galactic nuclei.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/40049c3df204071b2d84a82d84f5c5b50e85c3f0

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

1. H. Netzer
2. J. Dunlop
3. R. McLure
4. P. Hopkins
5. L. Hernquist
6. R. Maiolino
7. S. Komossa
8. K. Leighly

Citations in the corpus

• Properties of flat-spectrum radio-loud Narrow-Line Seyfert 1 Galaxies (2014, background): “Many authors favoured the latter hypothesis (e.g., Grupe 2000, Mathur 2000, Botte et al. 2004).”
• THE SIMULTANEOUS OPTICAL-TO-X-RAY SPECTRAL ENERGY DISTRIBUTION OF SOFT X-RAY SELECTED ACTIVE GALACTIC NUCLEI OBSERVED BY SWIFT (2010, background): “In this picture, Narrow Line Seyfert 1 galaxies (NLS1s) with their high L/LEdd are young members of the AGN family (Grupe et al. 1999; Mathur 2000; Grupe 2004).”
• Hubble Space Telescope STIS Ultraviolet Spectral Evidence of Outflow in Extreme Narrow-Line Seyfert 1 Galaxies. II. Modeling and Interpretation (2004, background): “Recently, several investigators have sought the early universe counterparts of NLS1s (e.g., Mathur 2000).”
• On the black hole–bulge mass relation in active and inactive galaxies (2001, background): “7 could be populated by so-called narrow-line Seyfert galaxies, which are thought to have intrinsically small black hole masses and to radiate at a large fraction of their Eddington limit (e.g. Mathur 2000), our present study does not support this.”
• A Chandra Survey of Broad Absorption Line Quasars (2001, background): “…links between low-ionization BALQSOs and IR-luminous mergers (Fabian 1999), and similarities between BALQSOs and and narrow line Seyfert 1 galaxies (Mathur 2000; Brandt & Gallagher 2000) may also support a scenario where BALQSOs are adolescent quasars in a transition phase, evolving from active…”
• A Comprehensive Study of 2000 Narrow Line Seyfert 1 Galaxies from the Sloan Digital Sky Survey. I. The Sample (2006, background): “It has been suggested that NLS1s are normal Seyfert galaxies in their early stage of evolution, when the SMBH is growing fast via accretingmass at a high rate (e.g.,Wang et al. 1996; Boller et al.1996; Laor et al. 1997; Mathur 2000).”
• The cosmological evolution of quasar black hole masses (2003, background): “Mathur 2000).”
• Near-Infrared Spectroscopy of High-Redshift Active Galactic Nuclei. I. A Metallicity-Accretion Rate Relationship (2004, background): “In this sense, the NLS1s in our sample may be in the early stages of their (current) activity, i.e., relatively ‘‘young’’ systems, as suggested by Mathur (2000).”
• Radio-loud Narrow-Line Type 1 Quasars (2006, background): “This includes the possibility of enhanced starburst activity in these objects (e.g., Mathur 2000, Shemmer et al. 2004).”