Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aj....109..981w&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 109, no. 3, p. 981-989
Astronomy and Astrophysics
Astronomy
20
Active Galaxies, Disk Galaxies, Galactic Evolution, Galactic Structure, H Alpha Line, Spiral Galaxies, Star Formation, Star Formation Rate, Flux Density, Image Analysis, Infrared Radiation, Red Shift, Spectrum Analysis, Stellar Luminosity, Stellar Spectrophotometry
Scientific paper
We report H-alpha and continuum imaging of 12 galaxies in the Bootes void. The H-alpha emission in ten galaxies is due to star formation; one galaxy is probably a narrow emission line Active Galactic Nuclei (AGN), and one a Seyfert 1. Star formation rates range from 3-55 solar mass/yr, with the most active galaxies producing stars at almost three times the rate found in normal field disk systems. Eleven galaxies have strong H-alpha emission in the nucleus. The morphology of several of the galaxies is disturbed. There are at least five spirals, three of which are probably one-armed spirals, and three edge-on disk systems. Three galaxies not identifiable as spirals have H-alpha emission from regions outside the nuclear point source. 1510+4727, which has the highest rate of star formation in our sample, does not have the strong far-infrared emission expected from a galaxy experiencing significant star formation. The galaxies are quite luminous MB = -21 to -23 mag), and are not the type predicted to be found in voids.
Brown Laurel
Cheng Kwang-Peng
Hintzen Paul
Liu Chan Chiang
Lowenthal James
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