Hidden H II regions in infrared-bright galaxies

Details Hidden H II regions in infrared-bright galaxies Hidden H II regions in infrared-bright galaxies

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...334l..63y&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 334, Nov. 15, 1988, p. L63-L67. Research supported by the Alfred

Astronomy and Astrophysics

Astronomy

49

Galactic Structure, H Ii Regions, Infrared Astronomy, Astronomical Maps, Cosmic Dust, Early Stars, H Alpha Line, Near Infrared Radiation, Star Formation

Scientific paper

To search for heavily obscured H II regions in five galaxies with high dust and gas contents, CCD images were obtained in the emission lines of H-alpha and 9532 A forbidden line S III. Comparison of these images yields maps of the obscuration to the emitting regions, if the intrinsic ratio of forbidden line S III/H-alpha is roughly constant within them. The reddening-corrected H-alpha maps alter dramatically our view of the total luminosity, surface brightness gradient, position of peak flux, and general morphology of the ionized gas structures in these galaxies; the hypothesis that young stars are the source of energy for the enormous infrared luminosities in these galaxies is confirmed.

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