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| Main Authors: | , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2411.14310 |
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| _version_ | 1866910707358892032 |
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| author | Emonts, B. H. C. Appleton, P. N. Lisenfeld, U. Guillard, P. Xu, C. K. Reach, W. T. Barcos-Munoz, L. Labiano, A. Ogle, P. M. O'Sullivan, E. Togi, A. Gallagher, S. C. Aromal, P. Duc, P. -A. Alatalo, K. Boulanger, F. Diaz-Santos, T. Helou, G. |
| author_facet | Emonts, B. H. C. Appleton, P. N. Lisenfeld, U. Guillard, P. Xu, C. K. Reach, W. T. Barcos-Munoz, L. Labiano, A. Ogle, P. M. O'Sullivan, E. Togi, A. Gallagher, S. C. Aromal, P. Duc, P. -A. Alatalo, K. Boulanger, F. Diaz-Santos, T. Helou, G. |
| contents | We present the large-scale distribution and kinematics of cold molecular gas across the compact galaxy group Stephan's Quintet, based on CO(2-1) observations performed with the Atacama Compact Array (ACA) and CO(1-0) data from the Combined Array for Research in Millimeter-wave Astronomy (CARMA). We find coherent structures of molecular gas associated with the galaxies and intra-group medium, which follow the distribution of warm H$_{2}$ previously seen with the James Webb Space Telescope (JWST). CO is associated with a ridge of shocked gas that crosses the galaxy group, and with a spiral arm of the intruding galaxy NGC7318b, which interacts with the intra-group medium along the ridge. Although the ridge contains widespread shocks, turbulent gas, and warm H$_{2}$, the CO lines are narrower than elsewhere in Stephan's Quintet (FWHM~25-65 km/s), indicative of settled cold gas. At a distinctly different velocity, CO is found in the active galaxy NGC7319 and Northern star-forming region SQ-A. A bridge of turbulent molecular gas connects NGC7319 with the ridge, covering a gap of ~700 km/s between these structures. The gas excitation ranges from $L'_{\rm CO(2-1)}$/$L'_{\rm CO(1-0)}$ ~ 0.3 in the bridge and SQ-A, to ~0.5 along the ridge, to near unity in the center of NGC7319. We also detect either a molecular outflow or turbulent molecular gas associated with the radio source in NGC7319. These ACA data are part of a program with the Atacama Large Millimeter/submillimeter Array (ALMA) and JWST to study molecular gas physics from the largest to the smallest scales across the intra-group medium of Stephan's Quintet. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_14310 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Bird's-eye View of Molecular Gas across Stephan's Quintet Galaxy Group and Intra-group Medium Emonts, B. H. C. Appleton, P. N. Lisenfeld, U. Guillard, P. Xu, C. K. Reach, W. T. Barcos-Munoz, L. Labiano, A. Ogle, P. M. O'Sullivan, E. Togi, A. Gallagher, S. C. Aromal, P. Duc, P. -A. Alatalo, K. Boulanger, F. Diaz-Santos, T. Helou, G. Astrophysics of Galaxies We present the large-scale distribution and kinematics of cold molecular gas across the compact galaxy group Stephan's Quintet, based on CO(2-1) observations performed with the Atacama Compact Array (ACA) and CO(1-0) data from the Combined Array for Research in Millimeter-wave Astronomy (CARMA). We find coherent structures of molecular gas associated with the galaxies and intra-group medium, which follow the distribution of warm H$_{2}$ previously seen with the James Webb Space Telescope (JWST). CO is associated with a ridge of shocked gas that crosses the galaxy group, and with a spiral arm of the intruding galaxy NGC7318b, which interacts with the intra-group medium along the ridge. Although the ridge contains widespread shocks, turbulent gas, and warm H$_{2}$, the CO lines are narrower than elsewhere in Stephan's Quintet (FWHM~25-65 km/s), indicative of settled cold gas. At a distinctly different velocity, CO is found in the active galaxy NGC7319 and Northern star-forming region SQ-A. A bridge of turbulent molecular gas connects NGC7319 with the ridge, covering a gap of ~700 km/s between these structures. The gas excitation ranges from $L'_{\rm CO(2-1)}$/$L'_{\rm CO(1-0)}$ ~ 0.3 in the bridge and SQ-A, to ~0.5 along the ridge, to near unity in the center of NGC7319. We also detect either a molecular outflow or turbulent molecular gas associated with the radio source in NGC7319. These ACA data are part of a program with the Atacama Large Millimeter/submillimeter Array (ALMA) and JWST to study molecular gas physics from the largest to the smallest scales across the intra-group medium of Stephan's Quintet. |
| title | Bird's-eye View of Molecular Gas across Stephan's Quintet Galaxy Group and Intra-group Medium |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2411.14310 |