2014/01/22 by M. S. Oey, E. Pellegrini, Oey, M. S. +5
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics of Galaxies (astro-ph.GA) #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #Stellar, planetary, and galactic studies
paper · pdf · doi:10.48550/arxiv.1401.5779
openalex publication_date 2014/01/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Ionization-parameter mapping (IPM) is a powerful technique for tracing the\noptical depth of Lyman continuum radiation from massive stars. Using\nnarrow-band line-ratio maps, we examine trends in radiative feedback from\nordinary HII regions of the Magellanic Clouds and nearby starburst galaxies. We\nfind that the aggregate escape fraction for the Lyman continuum is sufficient\nto ionize the diffuse, warm ionized medium in the Magellanic Clouds, and that\nmore luminous nebulae are more likely to be optically thin. We apply\nionization-parameter mapping to entire starburst galaxies, revealing ionization\ncones in two nearby starbursts. Within the limits of our small sample, we\nexamine the conditions for the propagation of ionizing radiation beyond the\nhost galaxies.\n