Faint object spectrograph observations of the low-luminosity Seyfert galaxy NGC 1566

Journal Article · Thu Aug 01 00:00:00 EDT 1991 · Astrophysical Journal; (United States)

DOI:https://doi.org/10.1086/186105· OSTI ID:5223942

Kriss, G A; Armus, L; Blair, W P; Caganoff, S; Hartig, G F ^[1]

---

1. Johns Hopkins University, Baltimore, MD (United States) Space Telescope Science Institute, Baltimore, MD (United States)

FOS observations of the Seyfert galaxy NGC 1566 show it to possess the broad lines characteristic of a typical Seyfert 1 galaxy, even in states of very low luminosity. The continuum, however, is steep with no suggestion of the ultraviolet excess seen in higher luminosity AGNs. The broad emission lines have symmetric profiles, but are redshifted by 200-1000 km/s relative to the systemic velocity. The broad-line ratios indicate a low ionization parameter, and the strength of lines such as Fe II, Mg II, and the Balmer continuum relative to the UV continuum supports models for X-ray heating of the broad-line cloud interiors. 36 refs.

• OSTI ID: 5223942
• Journal Information: Astrophysical Journal; (United States), Journal Name: Astrophysical Journal; (United States) Vol. 377; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BALMER LINES
COSMIC GASES
ELECTROMAGNETIC RADIATION
EMISSION SPECTRA
FLUIDS
GALAXIES
GALAXY NUCLEI
GASES
HEATING
IONIZING RADIATIONS
LUMINOSITY
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
RADIATIONS
SEYFERT GALAXIES
SPECTRA
ULTRAVIOLET SPECTRA
X RADIATION