Study of X-ray emission from the S147 nebula by SRG/eROSITA: Supernova-in-the-cavity scenario

Khabibullin II, Churazov EM, Chugai NN, Bykov AM, Sunyaev RA, Utrobin VP, Zinchenko II, Michailidis M, Pühlhofer G, Becker W, Freyberg M, Merloni A, Santangelo A, Sasaki M (2024)

Publication Type: Journal article

Publication year: 2024

Journal

Astronomy & Astrophysics EDP Sciences

Book Volume: 689

Article Number: A278

DOI: 10.1051/0004-6361/202449419

Abstract

The Simeis 147 nebula (S147) is particularly well known for a spectacular net of Hα-emitting filaments. It is often considered one of the largest and oldest (∼105 yr) cataloged supernova remnants in the Milky Way, although the kinematics of the pulsar PSR J0538+2817 suggests that this supernova remnant might be a factor of three younger. The former case is considered in a companion paper, while here we pursue the latter. Both studies are based on the data of SRG/eROSITA All-Sky Survey observations. Here, we confront the inferred properties of the X-ray emitting gas data with the scenario of a supernova explosion in a low-density cavity, such as a windblown-bubble. This scenario assumes that a ∼20 M progenitor star has had a low velocity with respect to the ambient interstellar medium, and so 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 does the reverse shock go deeper into the ejecta and power the observed X-ray emission of the nebula. The part of the remnant inside the dense shell remains non-radiative till this point, plausibly in a state with Te < Ti and nonequilibrium ionization. On the contrary, the forward shock becomes radiative immediately after entering the dense shell, and, being subject to instabilities, gives the nebula its characteristic “foamy” appearance in Hα and radio emission.

Authors with CRIS profile

Manami Sasaki Professur für Multiwellenlängenastronomie

Involved external institutions

Ludwig-Maximilians-Universität (LMU) DE Germany (DE) Russian Space Research Institute / Институт космических исследований Российской академии наук (IKI RAN) RU Russian Federation (RU) Institute of Astronomy (INASAN) / Federal State Institution of Science Institute of Astronomy of the Russian Academy of Sciences RU Russian Federation (RU) Ioffe Physical-Technical Institute / Физико-технический институт имени А. Ф. Иоффе РАН RU Russian Federation (RU) Institute of Applied Physics of the Russian Academy of Sciences (IAP RAS) / Институт прикладной физики Российской академии наук RU Russian Federation (RU) Eberhard Karls Universität Tübingen DE Germany (DE) Max-Planck-Institut für extraterrestrische Physik (MPE) / Max Planck Institute for Extraterrestrial Physics DE Germany (DE)

How to cite

APA:

Khabibullin, I.I., Churazov, E.M., Chugai, N.N., Bykov, A.M., Sunyaev, R.A., Utrobin, V.P.,... Sasaki, M. (2024). Study of X-ray emission from the S147 nebula by SRG/eROSITA: Supernova-in-the-cavity scenario. Astronomy & Astrophysics, 689. https://doi.org/10.1051/0004-6361/202449419

MLA:

Khabibullin, Ildar I., et al. "Study of X-ray emission from the S147 nebula by SRG/eROSITA: Supernova-in-the-cavity scenario." Astronomy & Astrophysics 689 (2024).

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