Astronomy and Astrophysics – Astronomy
Scientific paper
May 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987nascp2466..701d&link_type=abstract
Star formation in galaxies, Proceedings of a conference at the California Institute of Technology, Pasadena, California, June 16
Astronomy and Astrophysics
Astronomy
5
Galactic Nuclei, Line Spectra, Radio Emission, Star Formation, Stellar Spectrophotometry, Active Galactic Nuclei, Hydrogen Recombinations, Infrared Astronomy Satellite, Infrared Spectra, Seyfert Galaxies, Stellar Luminosity
Scientific paper
Observation of the Brackett-alpha and Brackett-gamma hydrogen recombination lines were made in a sample of galaxies chosen from the IRAS catalog to have high luminosities at infrared wavelengths. Most have strong Brackett line emission indicating large numbers of high mass stars; the formation of these stars may hence be the underlying source for the galaxies' luminosities. However, there are at least two exceptions that may not be explained in this manner: NGC 6240 and Arp 220. Additional evidence indicates that each of these exceptions may be more closely related to Seyfert-type galaxies or other active galactic nuclei.
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