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The HI/OH/Recombination line survey of the inner Milky Way (THOR): data release 2 and HI overview
Y. Wang, H. Beuther, M. R. Rugel +17
With the Very Large Array (VLA) in C-configuration, we observed a large portion of the first Galactic quadrant ( and $\lvert b \rvert \leq 1.25…
Strong excess Faraday rotation on the Inside of the Sagittarius spiral arm
R. Shanahan, S. J. Lemmer, J. M. Stil +12
We present first results for Faraday rotation of compact polarized sources (1 to 2 GHz continuum) in The HI/OH/Recombination line (THOR) survey of the inner Galaxy. In the Galactic…
The lifecycle of molecular clouds in nearby star-forming disc galaxies
Mélanie Chevance, J. M. Diederik Kruijssen, Alexander P. S. Hygate +29
It remains a major challenge to derive a theory of cloud-scale ( pc) star formation and feedback, describing how galaxies convert gas into stars as a function of the g…
The headlight cloud in NGC 628: An extreme giant molecular cloud in a typical galaxy disk
Cinthya N. Herrera, Jérôme Pety, Annie Hughes +25
Cloud-scale surveys of molecular gas reveal the link between molecular clouds properties and star formation (SF) across a range of galactic environments. Cloud populations in galax…
The Gas-Star Formation Cycle in Nearby Star-Forming Galaxies I. Assessment of Multi-scale Variations
Eva Schinnerer, Annie Hughes, Adam Leroy +21
The processes regulating star formation in galaxies are thought to act across a hierarchy of spatial scales. To connect extragalactic star formation relations from global and kpc-s…
Mapping electron temperature variations across a spiral arm in NGC 1672
I-Ting Ho, Kathryn Kreckel, Sharon E. Meidt +17
We report one of the first extragalactic observations of electron temperature variations across a spiral arm. Using MUSE mosaic observations of the nearby galaxy NGC 1672, we measu…
Mapping metallicity variations across nearby galaxy disks
K. Kreckel, I. -T. Ho, G. A. Blanc +21
The distribution of metals within a galaxy traces the baryon cycle and the buildup of galactic disks, but the detailed gas phase metallicity distribution remains poorly sampled. We…
OH maser emission in the THOR survey of the northern Milky Way
H. Beuther, A. Walsh, Y. Wang +13
Context: OH masers trace diverse physical processes, from the expanding envelopes around evolved stars to star-forming regions or supernovae remnants. Aims: We identify the ground-…
EMPIRE: The IRAM 30-m Dense Gas Survey of Nearby Galaxies
María J. Jiménez-Donaire, F. Bigiel, A. K. Leroy +14
We present EMPIRE, an IRAM 30-m large program that mapped mm dense gas tracers at kpc resolution across the whole star-forming disk of nine nearby, massive…
Astro2020: The Cycling of Matter from the Interstellar Medium to Stars and back
Robert Simon, Nicola Schneider, Frank Bigiel +15
Understanding the matter cycle in the interstellar medium of galaxies from the assembly of clouds to star formation and stellar feedback remains an important and exciting field in…
Dense gas is not enough: environmental variations in the star formation efficiency of dense molecular gas at 100pc scales in M51
M. Querejeta, E. Schinnerer, A. Schruba +17
It remains unclear what sets the efficiency with which molecular gas transforms into stars. Here we present a new VLA map of the spiral galaxy M51 in 33GHz radio continuum, an exti…