H II regions in seven dwarf irregular galaxies

Details H II regions in seven dwarf irregular galaxies H II regions in seven dwarf irregular galaxies

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...383..148s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 383, Dec. 10, 1991, p. 148-163.

Astronomy and Astrophysics

Astrophysics

50

Dwarf Galaxies, H Ii Regions, Interstellar Matter, Irregular Galaxies, Nebulae, Astronomical Maps, Charge Coupled Devices, H Alpha Line, Luminosity, Star Formation

Scientific paper

CCD H-alpha images are used to study the characteristics of the H II regions of seven nearby dwarf irregular galaxies. Maps and coordinates identify them, and the calibrated images are used to measure the emission-line luminosities of all the H II regions and to determine the H II region luminosity functions for the galaxies. The luminosity functions are all normal, with a mean value for the slope of the power-law fit of -1.5 +/- -0.3. H II region sizes and morphologies are examined, and values for the characteristic size scale are given; a weak correlation is found with the absolute magnitude of the host galaxy.

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