H2 2. 122 micron emission in NGC 3783 with a bare type 1 Seyfert nucleus

Journal Article · Sat Jul 01 00:00:00 EDT 1989 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/185483· OSTI ID:5595021

Kawara, Kimiaki; Nishida, Mimoru; Gregory, Brooke ^[1]

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1. National Astronomical Observatory, Tokyo (Japan)

The molecular hydrogen line, v = 1-0 S(1), has been detected in NGC 3783, which has a bare type-1 Seyfert nucleus free of extinction and contamination from the host galaxy. The luminosity of the line is 10-50 times smaller than that of NGC 7469, a dusty type 1 Seyfert. The possible connection between the presence of molecular clouds in and/or around the nucleus and the heavy absorbing column density derived from the X-ray cutoff are discussed, along with possible sources for the excitation of H2 molecules; namely, shock excitation by a wind from the nucleus, UV pumping by the nonthermal source, and X-ray heating of molecules by the strong X-ray source. 38 refs.

• OSTI ID: 5595021
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 342; 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
COSMIC GASES
COSMIC RAY SOURCES
COSMIC X-RAY SOURCES
ELECTROMAGNETIC RADIATION
ELEMENTS
EMISSION SPECTRA
FLUIDS
GALAXIES
GALAXY NUCLEI
GASES
HYDROGEN
INFRARED RADIATION
IONIZING RADIATIONS
LUMINOSITY
MOLECULES
NONMETALS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
RADIATIONS
SATELLITES
SEYFERT GALAXIES
SPECTRA
ULTRAVIOLET RADIATION
X RADIATION