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astro-ph2005
Comparison of the Halpha equivalent width of HII regions in a flocculent and a grand design galaxy: possible evidences for IMF variations
Bernabe Cedres, Jordi Cepa, Akihiko Tomita
We present here a study of the Halpha equivalent widths of the flocculent galaxy NGC 4395 and the grand design galaxy NGC 5457. A difference between the mean values of the Halpha e…
astro-ph2005
Effects of photon escape on diagnostic diagrams for HII regions
C. Giammanco, J. E. Beckman, B. Cedres
In this article we first outline the mounting evidence that a significant fraction of the ionizing photons emitted by OB stars within HII regions escape from their immediate surrou…