Astronomy and Astrophysics – Astronomy
Scientific paper
May 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983mnras.203..759p&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 203, May 1983, p. 759-765.
Astronomy and Astrophysics
Astronomy
56
Astronomical Spectroscopy, Emission Spectra, Galactic Nuclei, H Beta Line, Ionized Gases, Seyfert Galaxies, Far Ultraviolet Radiation, Galactic Radiation, Gas Dynamics, H Ii Regions, Kinematics, Oxygen Ions, Spatial Distribution, Velocity Distribution, X Rays
Scientific paper
The nuclear region of NGC 1365 shows emission from (1) H II regions ionized by young stars; (2) a central Seyfert nucleus; and (3) extended regions of high excitation gas with forbidden line O III 5007 much greater than H-beta, presumably located outside the disk of the galaxy and ionized by far-UV radiation and soft X-rays from the nucleus. New high dispersion spectroscopic observations reveal a velocity field that is considerably more complicated than the simple rotating disk previously inferred from observations of H-alpha and forbidden line N II, particularly in the case of the high excitation gas which shows noncircular or noncoplanar motion and line splittings over substantial areas. Preliminary interpretations are suggested involving either rotation in a tilted plane or ejection into the halo.
Edmunds Michael G.
Pagel Bernard E. J.
Phillips Marcia
Turtle A. J.
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