NGC-7552 - A GALAXY WITH A DORMANT ACTIVE NUCLEUS

Citation
Da. Forbes et al., NGC-7552 - A GALAXY WITH A DORMANT ACTIVE NUCLEUS, The Astrophysical journal, 433(1), 1994, pp. 120000013
Citations number
26
Categorie Soggetti
Astronomy & Astrophysics
Journal title
ISSN journal
0004637X
Volume
433
Issue
1
Year of publication
1994
Part
2
Database
ISI
SICI code
0004-637X(1994)433:1<120000013:N-AGWA>2.0.ZU;2-P
Abstract
Recent theoretical studies have suggested that small-scale bars may pr ovide the mechanism for transporting material (''fuel'') to a galaxy n ucleus. Here we present high-resolution imaging of NGC 7552 in the inf rared emission line of H-2 2.12 mum which reveals a possible nuclear b ar. We also present Brgamma 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 molecu lar bar and a large reservoir of molecular material, there is no evide nce for current activity, either starburst or Seyfert-like, at the nuc leus.