| Issue |
EPJ Web of Conferences
Volume 265, 2022
Multi-line Diagnostics of the Interstellar Medium
|
|
|---|---|---|
| Article Number | 00008 | |
| Number of page(s) | 4 | |
| DOI | https://doi.org/10.1051/epjconf/202226500008 | |
| Published online | 07 September 2022 | |
https://doi.org/10.1051/epjconf/202226500008
Multi-line modelling in nearby galaxies: The link between dense gas and star formation in different environments
1 Observatorio Astronómico Nacional (IGN), C/ Alfonso XII, 3, 28014 Madrid, Spain
* e-mail: a.usero@oan.es
** e-mail: axel.garcia@oan.es
*** http://phangs.org
Published online: 7 September 2022
The J=1–0 lines of HCN and HCO+ have become the default tracers of dense molecular gas in external galaxies. To study the relation between HCN and HCO+ emission and density, we have mapped their J=3–2 lines with the ALMA Compact Array (ACA) in the nearby star-forming galaxies NGC3351, NGC3627, and NGC4321. Combined with archival line maps of HCN(1–0), HCO+(1–0), CO(1–0), and CO(2–1), we use this data set to: (1) compare the excitation of dense gas tracers in normal and starburst/AGN galaxies; (2) explore how line ratios vary across galaxy disks; (3) infer the density distribution and other cloud properties on a pixel-by-pixel basis through a physically-motivated radiative transfer model.
© The Authors, Published by EDP Sciences, 2022
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0/).
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.