The authors analyze a set of optically faint emission-line galaxies discovered as strong Hα emitters in an objective prism survey (Wamsteker et al, 1985). This...
Self-sustaining galactic winds in spiral galaxies with starburst nuclei
In the circumnuclear zones of the disks of some spirals there is an absence of neutral interstellar hydrogen. A model is devised in which gaseous outflow is...
SN 1988A in M58 - A type II-P supernova with a high late-time luminosity
SN 1988A is (with exception of the well-observed SN 1987A) the only type II SN for which observations of the late tail of the light curve are presently...
Spatial and luminosity distributions of the ionized hydrogen in NGC 3992
From H-alpha CCD observations taken with the 4.2 m William Herschel Telescope a catalog of 394 HII regions of the spiral NGC 3992 has been compiled. The...
Spiral Galaxies: Requirements for accurate Photometric Bulge/Disk Decomposition
Selected photometric bands, spatial resolution, disk dimension in the frame and the scanned sky background level are determined in order to establish galactic...
Via Fourier analysis, applied to broad-band images of a sample of spiral galaxies, the relative contribution of each spiral mode to the spiral arms, as a...
Spirals and rings: how do they form? What are their structure and properties?
I will propose a new theory to explain the formation and properties of rings and spirals in barred galaxies, focusing on a comparison of theoretical results to...
We analyze the data from narrow band H-alpha and forbidden O III CCD imaging of a sample of nearby spiral galaxies with active nuclei. The results show that the...