JWST Observations of Starbursts: Relations between PAH features and CO clouds in the starburst galaxy M 82
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| Autores principales: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Formato: | Preprint |
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2025
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| author | Villanueva, V. Bolatto, A. D. Herrera-Camus, R. Leroy, A. Fisher, D. B. Levy, R. C. Böker, T. Boogaard, L. Cronin, S. A. Dale, D. A. Emig, K. De Looze, I. Donnelly, G. P. Lai, T. S. -Y. Lenkic, L. Lopez, L. A. Lopez, S. Meier, D. S. Ott, J. Relano, M. Smith, J. D. Tarantino, E. Veilleux, S. Walter, F. van der Werf, P. |
| author_facet | Villanueva, V. Bolatto, A. D. Herrera-Camus, R. Leroy, A. Fisher, D. B. Levy, R. C. Böker, T. Boogaard, L. Cronin, S. A. Dale, D. A. Emig, K. De Looze, I. Donnelly, G. P. Lai, T. S. -Y. Lenkic, L. Lopez, L. A. Lopez, S. Meier, D. S. Ott, J. Relano, M. Smith, J. D. Tarantino, E. Veilleux, S. Walter, F. van der Werf, P. |
| contents | We present a study of new 7.7-11.3 $μ$m data obtained with the James Webb Space Telescope Mid-InfraRed Instrument in the starburst galaxy M 82. In particular, we focus on the dependency of the integrated CO(1-0) line intensity on the MIRI-F770W and MIRI-F1130W filter intensities to investigate the correlation between CO content and the 7.7 and 11.3 $μ$m features from polycyclic aromatic hydrocarbons (PAH) in M 82's outflows. To perform our analysis, we identify CO clouds using archival $^{12}$CO($J$=1-0) NOEMA moment 0 map within 2 kpc from the center of M 82, with sizes ranging between $\sim$21 and 270 pc; then, we compute the CO-to-PAH relations for the 306 validated CO clouds. On average, the power-law slopes for the two relations in M 82 are lower than what is seen in local main-sequence spirals. In addition, there is a moderate correlation between $I_{\rm CO(1-0)}$-$I_{\rm 7.7μm} /I_{\rm 11.3μm}$ for most of the CO cloud groups analyzed in this work. Our results suggest that the extreme conditions in M 82 translate into CO not tracing the full budget of molecular gas in smaller clouds, perhaps as a consequence of photoionization and/or emission suppression of CO molecules due to hard radiation fields from the central starburst. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_14893 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | JWST Observations of Starbursts: Relations between PAH features and CO clouds in the starburst galaxy M 82 Villanueva, V. Bolatto, A. D. Herrera-Camus, R. Leroy, A. Fisher, D. B. Levy, R. C. Böker, T. Boogaard, L. Cronin, S. A. Dale, D. A. Emig, K. De Looze, I. Donnelly, G. P. Lai, T. S. -Y. Lenkic, L. Lopez, L. A. Lopez, S. Meier, D. S. Ott, J. Relano, M. Smith, J. D. Tarantino, E. Veilleux, S. Walter, F. van der Werf, P. Astrophysics of Galaxies We present a study of new 7.7-11.3 $μ$m data obtained with the James Webb Space Telescope Mid-InfraRed Instrument in the starburst galaxy M 82. In particular, we focus on the dependency of the integrated CO(1-0) line intensity on the MIRI-F770W and MIRI-F1130W filter intensities to investigate the correlation between CO content and the 7.7 and 11.3 $μ$m features from polycyclic aromatic hydrocarbons (PAH) in M 82's outflows. To perform our analysis, we identify CO clouds using archival $^{12}$CO($J$=1-0) NOEMA moment 0 map within 2 kpc from the center of M 82, with sizes ranging between $\sim$21 and 270 pc; then, we compute the CO-to-PAH relations for the 306 validated CO clouds. On average, the power-law slopes for the two relations in M 82 are lower than what is seen in local main-sequence spirals. In addition, there is a moderate correlation between $I_{\rm CO(1-0)}$-$I_{\rm 7.7μm} /I_{\rm 11.3μm}$ for most of the CO cloud groups analyzed in this work. Our results suggest that the extreme conditions in M 82 translate into CO not tracing the full budget of molecular gas in smaller clouds, perhaps as a consequence of photoionization and/or emission suppression of CO molecules due to hard radiation fields from the central starburst. |
| title | JWST Observations of Starbursts: Relations between PAH features and CO clouds in the starburst galaxy M 82 |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2501.14893 |