The ALMA-QUARKS Survey: Evidence of an Explosive Molecular Outflow in IRAS 15520--5234
Fuente:
arXiv
Guardado en:
| Autores principales: | , , , , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2026
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866911518900092928 |
|---|---|
| author | Hoque, Ariful Baug, Tapas Guzman, Estrella Lopez, Manuel Fernandez Liu, Tie Garay, Guido Goldsmith, Paul F. Xu, Fengwei Tang, Xindi Sanhueza, Patricio Dewangan, Lokesh K. Gupta, Shivani Dib, Sami Zapata, Luis A. Hwang, Jihye Bhadari, N. K. Bally, John Das, Swagat Ranjan Yang, Aiyuan Gorai, Prasanta Maity, Arup Kumar Chibueze, James O. García, Pablo Bronfman, Leonardo Liu, Xunchuan Tóth, L. Viktor Usman, Shehu Muhammad Kim, Kee-Tae |
| author_facet | Hoque, Ariful Baug, Tapas Guzman, Estrella Lopez, Manuel Fernandez Liu, Tie Garay, Guido Goldsmith, Paul F. Xu, Fengwei Tang, Xindi Sanhueza, Patricio Dewangan, Lokesh K. Gupta, Shivani Dib, Sami Zapata, Luis A. Hwang, Jihye Bhadari, N. K. Bally, John Das, Swagat Ranjan Yang, Aiyuan Gorai, Prasanta Maity, Arup Kumar Chibueze, James O. García, Pablo Bronfman, Leonardo Liu, Xunchuan Tóth, L. Viktor Usman, Shehu Muhammad Kim, Kee-Tae |
| contents | We present a study of the massive protocluster IRAS 15520$-$5234, which displays evidence of an explosive molecular outflow that unleashed a kinetic energy of at least 10$^{48}$ erg. The protocluster contains 16 dense cores detected in the ALMA band 6 continuum emission maps, having masses in the range from 0.2 to 11.0 M$_{\odot}$. Our analysis of CO $(2-1)$ emission reveals 28 well collimated outflow fingers, the majority of which follow a Hubble-Lemaître velocity law. The outflow fingers show no preferred orientation in the plane of sky and emerge from a common center of origin. We estimate the total mass, momentum, and kinetic energy of the outflow fingers and find that the values are at least one order of magnitude higher than the typical bipolar outflows associated with massive protostars. The morphology and kinematics of the outflow fingers suggest that the outflow associated with IRAS 15520$-$5234 is explosive in nature. We calculate the dynamical age of the explosive event to be approximately 6550 years. Additionally, we estimate the frequency of such explosive outflows in the Galaxy, which is one event every 83 years. Finally, we speculate that the rearrangement of masses within the massive protocluster and the dynamical interaction among the massive cores may result in the formation of such an energetic event. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_15040 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | The ALMA-QUARKS Survey: Evidence of an Explosive Molecular Outflow in IRAS 15520--5234 Hoque, Ariful Baug, Tapas Guzman, Estrella Lopez, Manuel Fernandez Liu, Tie Garay, Guido Goldsmith, Paul F. Xu, Fengwei Tang, Xindi Sanhueza, Patricio Dewangan, Lokesh K. Gupta, Shivani Dib, Sami Zapata, Luis A. Hwang, Jihye Bhadari, N. K. Bally, John Das, Swagat Ranjan Yang, Aiyuan Gorai, Prasanta Maity, Arup Kumar Chibueze, James O. García, Pablo Bronfman, Leonardo Liu, Xunchuan Tóth, L. Viktor Usman, Shehu Muhammad Kim, Kee-Tae Astrophysics of Galaxies We present a study of the massive protocluster IRAS 15520$-$5234, which displays evidence of an explosive molecular outflow that unleashed a kinetic energy of at least 10$^{48}$ erg. The protocluster contains 16 dense cores detected in the ALMA band 6 continuum emission maps, having masses in the range from 0.2 to 11.0 M$_{\odot}$. Our analysis of CO $(2-1)$ emission reveals 28 well collimated outflow fingers, the majority of which follow a Hubble-Lemaître velocity law. The outflow fingers show no preferred orientation in the plane of sky and emerge from a common center of origin. We estimate the total mass, momentum, and kinetic energy of the outflow fingers and find that the values are at least one order of magnitude higher than the typical bipolar outflows associated with massive protostars. The morphology and kinematics of the outflow fingers suggest that the outflow associated with IRAS 15520$-$5234 is explosive in nature. We calculate the dynamical age of the explosive event to be approximately 6550 years. Additionally, we estimate the frequency of such explosive outflows in the Galaxy, which is one event every 83 years. Finally, we speculate that the rearrangement of masses within the massive protocluster and the dynamical interaction among the massive cores may result in the formation of such an energetic event. |
| title | The ALMA-QUARKS Survey: Evidence of an Explosive Molecular Outflow in IRAS 15520--5234 |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2603.15040 |