Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009jkas...42..125s&link_type=abstract
Journal of the Korean Astronomical Society, vol. 42, no. 5, pp. 125-134
Astronomy and Astrophysics
Astronomy
Individual: Ngc 5728, Galaxies: Kinematics And Dynamics, Galaxies: Seyfert: Nuclei, Galaxies: Emission Lines
Scientific paper
We investigated the circumnuclear region of the Seyfert 2 galaxy NGC 5728, using the CFHT 3.6 m OASIS S II, O III, & Hβ, spectral images complemented with the IUE spectra. The physical condition of the circumnuclear zone has been derived: the gas density (indicated by S II6716/31 ratio) around the C core is generally similar to that around the NW core, i.e., ˜ 500 cm^{-3}. However, there appears to be evidence of a higher density shell in front of the NW core, ˜10^{4} cm ^{-3} at -250 kms. The IUE ssi 1892/ç1909 ratio implies a possible presence of a broad emission region of gas densities of ˜10^{10} cm^{-3}. The SE cone and surrounding area show several prominent features, while the NW cone does not show any particular structure: we identified three prominent blobs in the SE cone and one possible candidate in the NW cone. The outflow activities exist within the relatively large conic opening angle. We discussed the possibility of inflow or outflow activities of blobs found in the circumnuclear region of NGC 5728. The gas around two cores, two cones, and several blobs, is likely to be excited by the AGN hot source(s).
Ferruit Pierre
Hyung Siek
Lee Seong-Jae
Son Dong-Hoon
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