view Abstract Citations (94) References (38) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Extended gaseous emission in normal elliptical galaxies. Demoulin-Ulrich, M. -H. ; Butcher, H. R. ; Boksenberg, A. Abstract Observations of the spatial distribution, velocity field, and line intensities of the extended gaseous emission in a small sample of nearby normal elliptical galaxies are reported. Extended H II emission is found in the central regions of roughly half of the sample. The gas appears to be in rotational equilibrium, although the morphology of the detected regions is not disklike. The observed lack of a general correlation between the rotation axes of the gas and the rotation axes or the isophotes of the stellar population can be explained by the gas being either in normal closed orbits in the equatorial plane of a triaxial galaxy or by being in differential precession. Three ionizing mechanisms for the gas are considered: energy provided by normal stellar processes such as ultraviolet stellar photons, stellar winds, and supernova ejecta; gas shed by stars and falling on the central disk of ionized gas; and energy sources not directly related to a normal stellar population. Publication: The Astrophysical Journal Pub Date: October 1984 DOI: 10.1086/162527 Bibcode: 1984ApJ...285..527D Keywords: Elliptical Galaxies; Emission Spectra; Galactic Structure; Gas Dynamics; Interstellar Gas; Ionized Gases; Energy Budgets; Galactic Nuclei; Galactic Rotation; Hydrogen Clouds; Kinematics; Velocity Distribution; Astrophysics full text sources ADS | data products SIMBAD (13) NED (12)