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NOEMA High Fidelity Imaging of the Molecular Gas in and around M82 by Krieger, Nico; Walter, Fabian; Bolatto, Alberto D.; Guillard, Pierre; Lehnert, Matthew; Leroy, Adam; Pety, Jérôme; Emig, Kimberly L.; Levy, Rebecca C.; Krips, Melanie; Rix, Hans-Walter; Salak, Dragan; Weiss, Axel; Veilleux, Sylvain is a scholarly article available to read on EtoBox.

What is NOEMA High Fidelity Imaging of the Molecular Gas in and around M82 about?

We present a 154 pointing IRAM NOEMA mosaic of the CO(1-0) line emission in and around the nearby starburst galaxy M82. The observations, complemented by zero--spacing observations, reach a spatial resolution of $\sim$30 pc ($\sim 1.9^{\prime\prime}$) at 5.0 km s$^{-1}$ spectral resolution, sufficient to resolve the molecular gas in the central starburst disk, the outflow, as well as the tidal streamers. The resulting moment and peak brightness maps show a striking amount of structure. Using a clump decomposition algorithm, we analyse the physical properties (e.g., radii $R$, line widths $\sigma$, and masses $M$) of $\sim2000$ molecular clouds. To first order, the clouds' properties are very similar, irrespective of their environment. This also holds for the size-line width relations of the clouds. The distribution of clouds in the $\sigma^2/R$ vs. column density $\Sigma$ space suggests that external pressure does not play a significant role in setting their physical parameters in the outflow and the streamers. We find that the clouds in the streamers stay approximately constant in size ($R \sim 50$ pc) and mass ($M \sim 10^5$ M$_\odot$) and do not vary with their projected distanc

Author

Krieger, Nico; Walter, Fabian; Bolatto, Alberto D.; Guillard, Pierre; Lehnert, Matthew; Leroy, Adam; Pety, Jérôme; Emig, Kimberly L.; Levy, Rebecca C.; Krips, Melanie; Rix, Hans-Walter; Salak, Dragan; Weiss, Axel; Veilleux, Sylvain

Published

2021

Language

EN