The spatial extent of the 3.3 micron emission feature in the Seyfert galaxy NGC 7469

Details The spatial extent of the 3.3 micron emission feature in the Seyfert galaxy NGC 7469 The spatial extent of the 3.3 micron emission feature in the Seyfert galaxy NGC 7469

May 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...280..521c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 280, May 15, 1984, p. 521-527.

Astronomy and Astrophysics

Astronomy

68

Astronomical Spectroscopy, Infrared Astronomy, Seyfert Galaxies, Continuous Spectra, Emission Spectra, Interstellar Gas, Line Spectra, Spatial Distribution

Scientific paper

Multiaperture observations of the type 1 Seyfert galaxy NGC 7469 have been made to examine the spatial extent of the source of the 3.3 μm emission feature and the 1 - 4 μm continuum. The near-infrared continuum is dominated by a source, possibly thermal in origin, less than 2arcsec (480 pc) in diameter. Nearly 80% of the 4.7×107L_sun; in the 3.3 μm feature, however, is found to arise in a region between 240 and 730 pc from the central source; this implies the presence of dust in this region with a temperature of ≥300K. Dust heating must occur in situ and is most likely due to radiation from young, hot stars in circumnuclear H II regions.

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