NGC 7552: A galaxy with a dormant active nucleus?

Details NGC 7552: A galaxy with a dormant active nucleus? NGC 7552: A galaxy with a dormant active nucleus?

Sep 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...433l..13f&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 433, no. 1, p. L13-L16

Astronomy and Astrophysics

Astronomy

22

Active Galactic Nuclei, Barred Galaxies, Emission Spectra, Galactic Nuclei, Infrared Astronomy, Infrared Imagery, Molecular Spectra, Starburst Galaxies, Astronomical Models, Astronomical Photography, Astronomical Spectroscopy, Bromine, Hydrogen, Infrared Telescopes, Line Spectra, Molecular Gases

Scientific paper

Recent theoretical studies have suggested that small-scale bars may provide the mechanism for transporting material ('fuel') to a galaxy nucleus. Here we present high-resolution imaging of NGC 7552 in the infrared emission line of H2 2.12 microns which reveals a possible nuclear bar. We also present Br-gamma imaging which clearly shows the kiloparsec-sized starburst ring previously identified in the radio by Forbes et al. 1994. Although this galaxy appears to possess a small-scale molecular bar and a large reservoir of molecular material, there is no evidence for current activity, either starburst or Seyfert-like, at the nucleus.

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