Optical HII regions in M81

Details Optical HII regions in M81 Optical HII regions in M81

Sep 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26as...74..475p&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 74, no. 3, Sept. 1988, p. 475-484.

Astronomy and Astrophysics

Astrophysics

36

Astronomical Catalogs, H Ii Regions, Interstellar Matter, Spiral Galaxies, Stellar Luminosity, Angular Resolution, Astronomical Photography, H Alpha Line, Spectral Bands

Scientific paper

A catalogue of 492 H II regions in the spiral galaxy M81 has been compiled from the analysis of a narrow-band Hα photograph. The catalogue gives X, Y off-set positions of the identified H II regions, Hα fluxes and angular diameters corrected for instrumental broadening. It is found that the frequency distribution of the H II region diameters follows Van den Bergh's law and that the Hα luminosity function is well represented by a power-law. Also, a good agreement is found between the total Hα and 2000 Å fluxes.

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