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Burton's Curse: The Impact of Bulk Flows on the Galactic Longitude-Velocity Diagram and the Illusion of a Continuous Perseus Arm
J. E. G. Peek, Kirill Tchernyshyov, Marc-Antoine Miville-Deschenes
In this work we demonstrate that the Perseus Arm is not a continuous structure of molecular gas in the second quadrant. We first show that the observed, distanced-resolved velocity…
GASKAP-HI Pilot Survey Science I: ASKAP Zoom Observations of HI Emission in the Small Magellanic Cloud
N. M. Pingel, J. Dempsey, N. M. McClure-Griffiths +53
We present the most sensitive and detailed view of the neutral hydrogen (HI) emission associated with the Small Magellanic Cloud (SMC), through the combination of data from the Aus…
GASKAP Pilot Survey Science II: ASKAP Zoom Observations of Galactic 21-cm Absorption
J. M. Dickey, J. M. Dempsey, N. M. Pingel +12
Using the Australian Square Kilometre Array Pathfinder to measure 21-cm absorption spectra toward continuum background sources, we study the cool phase of the neutral atomic gas in…
Mass, Morphing, Metallicities: The Evolution of Infalling High Velocity Clouds
F. Heitsch, A. Marchal, M. -A. Miville-Deschênes +2
We revisit the reliability of metallicity estimates of high velocity clouds with the help of hydrodynamical simulations. We quantify the effect of accretion and viewing angle on me…
Which Molecular Cloud Structures Are Bound?
Neal J. Evans, Mark Heyer. Marc-Antoine Miville-Deschênes, Quang Nguyen-Luong. Manuel Merello
We analyze surveys of molecular cloud structures defined by tracers ranging from CO through CO to dust emission together with NH data. The mean value…