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Triggered Star Formation and the Creation of the Supergiant HI Shell in IC 2574
Daniel R. Weisz, Evan D. Skillman, John M. Cannon +4
Based on deep imaging from the Advanced Camera for Surveys aboard the Hubble Space Telescope, we present new evidence that stellar feedback created a ~ 1 kpc supergiant HI shell (S…
The Recent Star Formation Histories of M81 Group Dwarf Irregular Galaxies
Daniel R. Weisz, Evan D. Skillman, John M. Cannon +4
We present observations and analysis of nine dwarf irregular galaxies (dIs) in the M81 Group taken with the Advanced Camera for Surveys aboard the Hubble Space Telescope. The nine…
The Low CO Content of the Extremely Metal Poor Galaxy I Zw 18
Adam Leroy, John Cannon, Fabian Walter +2
We present sensitive molecular line observations of the metal-poor blue compact dwarf I Zw 18 obtained with the IRAM Plateau de Bure interferometer. These data constrain the CO J=1…
Dust and Atomic Gas in Dwarf Irregular Galaxies of the M81 Group: The SINGS and THINGS view
F. Walter, J. Cannon, H. Roussel +22
[abridged] We present observations of the dust and atomic gas phase in seven dwarf irregular galaxies of the M81 group from the SINGS and THINGS surveys. The Spitzer observations p…
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…