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Molecular Gas Velocity Dispersions in the Andromeda Galaxy
Anahi Caldu-Primo, Andreas Schruba
In order to characterize the distribution of molecular gas in spiral galaxies, we study the line profiles of CO:1-0 emission in Andromeda, our nearest massive spiral galaxy. We com…
Herschel Spectroscopic Observations of LITTLE THINGS Dwarf Galaxies
Phil Cigan, Lisa Young, Diane Cormier +8
We present far-infrared spectral line observations of five galaxies from the LITTLE THINGS sample: DDO 69, DDO 70, DDO 75, DDO 155, and WLM. While most studies of dwarfs focus on b…
The Panchromatic Hubble Andromeda Treasury VIII: A Wide-Area, High-Resolution Map of Dust Extinction in M31
Julianne J. Dalcanton, Morgan Fouesneau, David W. Hogg +15
We map the distribution of dust in M31 at 25pc resolution, using stellar photometry from the Panchromatic Hubble Andromeda Treasury. We develop a new mapping technique that models…
Variations in the Star Formation Efficiency of the Dense Molecular Gas across the Disks of Star-Forming Galaxies
Antonio Usero, Adam K. Leroy, Fabian Walter +9
We present a new survey of HCN(1-0) emission, a tracer of dense molecular gas, focused on the little-explored regime of normal star-forming galaxy disks. Combining HCN, CO, and inf…
The Panchromatic Hubble Andromeda Treasury XI: The Spatially-Resolved Recent Star Formation History of M31
Alexia R. Lewis, Andrew E. Dolphin, Julianne J. Dalcanton +15
We measure the recent star formation history (SFH) across M31 using optical images taken with the \texit{Hubble Space Telescope} as part of the Panchromatic Hubble Andromeda Treasu…
The chemical evolution of local star forming galaxies: Radial profiles of ISM metallicity, gas mass, and stellar mass and constraints on galactic accretion and winds
Rolf-Peter Kudritzki, I-Ting Ho, Andreas Schruba +4
The radially averaged metallicity distribution of the ISM and the young stellar population of a sample of 20 disk galaxies is investigated by means of an analytical chemical evolut…
High-resolution mass models of dwarf galaxies from LITTLE THINGS
Se-Heon Oh, Deidre A. Hunter, Elias Brinks +13
We present high-resolution rotation curves and mass models of 26 dwarf galaxies from LITTLE THINGS. LITTLE THINGS is a high-resolution Very Large Array HI survey for nearby dwarf g…
Spatially extended and high-velocity dispersion molecular component in spiral galaxies: single-dish vs. interferometric observations
Anahi Caldu-Primo, Andreas Schruba, Fabian Walter +3
Recent studies of the molecular medium in nearby galaxies have provided mounting evidence that the molecular gas can exist in two phases: one that is clumpy and organized as molecu…