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Effects of massive star formation on the ISM of dwarf galaxies by Suzanne C Madden is a Physics and Astronomy article available to read on EtoBox.

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We are studying star formation effects on the properties of the ISM in low metallicity environments using mid-infrared (MIR) and far-infrared (FIR) observations of starbursting dwarf galaxies taken with the Infrared Space Observatory (ISO) and the Kuiper Airborne Observatory (KAO). Effects of the hard pervasive radiation field on the gas and dust due to the dust-poor environments are apparent in both the dust and gas components. From a 158 mm [CII] survey we find enhanced I[CII] / FIR ratios in dwarf galaxies and I[CII] / I(CO) ratios up to 10 times higher than those for normal metallicity starburst galaxies. We consider MIR observations in understanding the star formation properties of dwarf galaxies and constraints on the stellar SED. Notably, the strong MIR [NeIII] / [NeII] ratios reveal the presence of current massive stellar populations , 5 My old in NGC 1569, NGC 1140 and IIZw40. The MIR unidentified infrared bands (UIBs) are weak, if present at all, as a general characteristic in low metallicity environments, revealing the destruction of the smallest carbon particles (e.g. PAHs) over large spatial scales. This is confirmed with our dust modeling: mass fractions of PAHs are a

Who reads Effects of massive star formation on the ISM of dwarf galaxies?

Author

Suzanne C Madden

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 1387-6473)

Published

2000

Language

EN

Field

Physics and Astronomy (Physical Sciences)