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Quantifying non-star formation associated 8um dust emission in NGC 628
Alison F. Crocker, Daniela Calzetti, David A. Thilker +6
Combining Ha and IRAC images of the nearby spiral galaxy NGC 628, we find that between 30-43% of its 8um dust emission is not related to recent star formation. Contributions from d…
Calibrating Extinction-Free Star Formation Rate Diagnostics with 33GHz Free-Free Emission in NGC6946
E. J. Murphy, J. J. Condon, E. Schinnerer +20
Abridged: Using free-free emission measured in the Ka-band (26-40GHz) for 10 star-forming regions in the nearby galaxy NGC6946, including its starbursting nucleus, we compare a num…
Optical Spectroscopy and Nebular Oxygen Abundances of the Spitzer/SINGS Galaxies
John Moustakas, Robert C. Kennicutt, Christy A. Tremonti +3
We present intermediate-resolution optical spectrophotometry of 65 galaxies obtained in support of the Spitzer Infrared Nearby Galaxies Survey (SINGS). For each galaxy we obtain a…
Nearby Galaxies with Spitzer
D. Calzetti, R. C. Kennicutt, D. A. Dale +7
We review the main advances brought by the Spitzer Space Telescope in the field of nearby galaxies studies, concentrating on a few subject areas, including: (1) the physics of the…
Paschen-alpha Emission in the Gravitationally Lensed Galaxy SMM J163554.2+661225
Casey Papovich, Gregory Rudnick, Jane Rigby +5
We report the detection of the Paschen-alpha emission line in the z=2.515 galaxy SMM J163554.2+661225 using Spitzer spectroscopy. SMM J163554.2+661225 is a sub-millimeter-selected…