Mathematics – Logic
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21725831b&link_type=abstract
American Astronomical Society, AAS Meeting #217, #258.31; Bulletin of the American Astronomical Society, Vol. 43, 2011
Mathematics
Logic
Scientific paper
Star Formation Rates (SFR’s) of nearby galaxies are measured in multiple wavelengths, drawing a coherent picture of star formation and allowing for corrections in visible wavelengths due to dust extinction. Galaxies at greater cosmological distances are currently measured almost solely in visible light, which may lead to a depression of the estimate of the SFR if extinction is not accurately estimated and taken into account. The purpose of this study is to provide a measure of the star formation rate and extinction in thirty near-by star-forming regions in different host galaxies, by using the Hα recombination line to estimate the rate of star formation, and the Balmer decrement (the ratio of Hβ to Hα) to estimate extinction. The SFR measured from the extinction-corrected Hα luminosity in individual regions will be compared to its dust emission in the IR to study the coupling of the Hα and dust emission and whether there is a trend between optical extinction and IR emission at the scales of individual star-forming regions, which may break down if the integrated IR emission in galaxies comes from regions where the Hα emission is mostly absent and vice-versa.
The authors wish to acknowledge funds provided by the Cottrell Research Corporation and the National Science Foundation (AST 0909240).
Berke Daniel
Takamiya Marianne
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