Spectra of narrow-line Seyfert 1 galaxies

Journal Article · Tue Oct 01 00:00:00 EDT 1985 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/163513· OSTI ID:5612741

Osterbrock, D E; Pogge, R W

Measurements are presented of a group of active galactic nuclei with all the properties of Seyfert 1 or 1.5 galaxies, but with unusually narrow H I lines. They include Mrk 42, 359, and 1239 (previously studied by other authors) as well as Mrk 493, 766, 783, and 1126. One other somewhat similar object, Mrk 1388, is also included in the discussion; measurements of its spectrum have been published previously. These narrow-line Seyfert 1 galaxies show a wide variety of deviations from the properties of typical Seyfert 1 objects. They clearly demonstrate that the Seyfert phenomenon is not a simple one-parameter effect. 29 references.

• Research Organization: Lick Observatory, Santa Cruz, CA
• OSTI ID: 5612741
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 297; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640103* -- Astrophysics & Cosmology-- Quasi-Stellar
Radio
& X-Ray Sources-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
BALMER LINES
CHARGED PARTICLES
ELEMENTS
EMISSION SPECTRA
ENERGY SPECTRA
GALAXIES
GALAXY NUCLEI
HYDROGEN IONS
IONS
IRON
LUMINOSITY
METALS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
SEYFERT GALAXIES
SPECTRA
TRANSITION ELEMENTS