Study of X-ray emission from the S147 nebula by SRG/eROSITA: supernova-in-the-cavity scenario
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2024
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| author | Khabibullin, Ildar I. Churazov, Eugene M. Chugai, Nikolai N. Bykov, Andrei M. Sunyaev, Rashid A. Utrobin, Victor P. Zinchenko, Igor I. Michailidis, Miltiadis Puehlhofer, Gerd Becker, Werner Freyberg, Michael Merloni, Andrea Santangelo, Andrea Sasaki, Manami |
| author_facet | Khabibullin, Ildar I. Churazov, Eugene M. Chugai, Nikolai N. Bykov, Andrei M. Sunyaev, Rashid A. Utrobin, Victor P. Zinchenko, Igor I. Michailidis, Miltiadis Puehlhofer, Gerd Becker, Werner Freyberg, Michael Merloni, Andrea Santangelo, Andrea Sasaki, Manami |
| contents | The Simeis~147 nebula (S147), particularly well known for a spectacular net of ${\rm H}_α$-emitting filaments, is often considered one of the largest and oldest known supernova remnants in the Milky Way. Here, and in a companion paper, we present studies of X-ray emission from the S147 nebula using the data of SRG/eROSITA All-Sky Survey observations. In this paper, we argue that many inferred properties of the X-ray emitting gas are broadly consistent with a scenario of the supernova explosion in a low-density cavity, e.g. a wind-blown-bubble. This scenario assumes that a $\sim 20\,{\rm M_\odot}$ progenitor star has had small velocity with respect to the ambient ISM, so it stayed close to the center of a dense shell created during its Main Sequence evolution till the moment of the core-collapse explosion. The ejecta first propagate through the low-density cavity until they collide with the dense shell, and only then the reverse shock goes deeper into the ejecta and powers the observed X-ray emission of the nebula. The part of the remnant inside the dense shell remains non-radiative till now and, plausibly, in a state with $T_e<T_i$ and Non-Equilibrium Ionization (NEI). On the contrary, the forward shock becomes radiative immediately after entering the dense shell, and, being subject to instabilities, creates a characteristic "foamy" appearance of the nebula in ${\rm H}_α$ and radio emission. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2401_17261 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Study of X-ray emission from the S147 nebula by SRG/eROSITA: supernova-in-the-cavity scenario Khabibullin, Ildar I. Churazov, Eugene M. Chugai, Nikolai N. Bykov, Andrei M. Sunyaev, Rashid A. Utrobin, Victor P. Zinchenko, Igor I. Michailidis, Miltiadis Puehlhofer, Gerd Becker, Werner Freyberg, Michael Merloni, Andrea Santangelo, Andrea Sasaki, Manami High Energy Astrophysical Phenomena Astrophysics of Galaxies Solar and Stellar Astrophysics The Simeis~147 nebula (S147), particularly well known for a spectacular net of ${\rm H}_α$-emitting filaments, is often considered one of the largest and oldest known supernova remnants in the Milky Way. Here, and in a companion paper, we present studies of X-ray emission from the S147 nebula using the data of SRG/eROSITA All-Sky Survey observations. In this paper, we argue that many inferred properties of the X-ray emitting gas are broadly consistent with a scenario of the supernova explosion in a low-density cavity, e.g. a wind-blown-bubble. This scenario assumes that a $\sim 20\,{\rm M_\odot}$ progenitor star has had small velocity with respect to the ambient ISM, so it stayed close to the center of a dense shell created during its Main Sequence evolution till the moment of the core-collapse explosion. The ejecta first propagate through the low-density cavity until they collide with the dense shell, and only then the reverse shock goes deeper into the ejecta and powers the observed X-ray emission of the nebula. The part of the remnant inside the dense shell remains non-radiative till now and, plausibly, in a state with $T_e<T_i$ and Non-Equilibrium Ionization (NEI). On the contrary, the forward shock becomes radiative immediately after entering the dense shell, and, being subject to instabilities, creates a characteristic "foamy" appearance of the nebula in ${\rm H}_α$ and radio emission. |
| title | Study of X-ray emission from the S147 nebula by SRG/eROSITA: supernova-in-the-cavity scenario |
| topic | High Energy Astrophysical Phenomena Astrophysics of Galaxies Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2401.17261 |