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On Extending the Mass-Metallicity Relation of Galaxies by 2.5 Decades in Stellar Mass
Henry Lee, Evan D. Skillman, John M. Cannon +4
We report 4.5 micron luminosities for 27 nearby (D < 5 Mpc) dwarf irregular galaxies measured with the Spitzer Infrared Array Camera. We have constructed the 4.5 micron luminosity-…
Hot Dust and PAH Emission at Low Metallicity: A Spitzer Survey of Local Group and Other Nearby Dwarf Galaxies
Dale C. Jackson, John M. Cannon, Evan D. Skillman +4
We present Spitzer Space Telescope 4.5 and 8.0 micron imaging of 15 Local Group and nearby dwarf galaxies. Our sample spans a range of more than one dex in nebular metallicity and…
Spitzer 4.5 micron Luminosity-Metallicity and Mass-Metallicity Relations for Nearby Dwarf Irregular Galaxies
Henry Lee, E. D. Skillman, J. M. Cannon +4
For a sample of 25 dwarf irregular galaxies with distances D < 5 Mpc and measured oxygen abundances, we present results derived from stellar masses and galaxy luminosities from nea…
Extended Mid-Infrared Aromatic Feature Emission in M 82
C. W. Engelbracht, P. Kundurthy, K. D. Gordon +19
We present new images (groundbased optical and mid-infrared (MIR) from the Spitzer Space Telescope) and spectra (from Spitzer) of the archetypal starburst galaxy M 82. The Spitzer…