INFRARED AND X-RAY EMISSION OF A SUPERNOVA REMNANT IN A CLUMPY MEDIUM
- Authors: Dedikov S.Y.1, Vasiliev E.O.1
-
Affiliations:
- P. N. Lebedev Physical Institute of the Russian Academy of Sciences
- Issue: Vol 102, No 3 (2025)
- Pages: 159–169
- Section: Articles
- URL: https://ogarev-online.ru/0004-6299/article/view/301721
- DOI: https://doi.org/10.31857/S0004629925030016
- EDN: https://elibrary.ru/FZRTPT
- ID: 301721
Cite item
Abstract
The infrared (IR) to X-ray luminosity ratio (IRX) is an indicator of the role of the dust plays in cooling of hot gas in supernova remnants (SNR). Using the 3D dynamics of gas and interstellar polydisperse dust grains we analyzed the evolution of SNR in the inhomogeneous medium. We obtained spatial distributions of the surface brightness both of the X-ray emission from hot gas inside SNR and the IR emission from the SNR swept-up shell, as well as, the average gas temperature in the SNR, 𝑇X. We found that the IRX changes significantly (∼ 3–30 times) as a function of impact distance within the SNR and its age. In a low inhomogeneous medium the IRX drops rapidly during the SNR evolution. On the other hand, if large inhomogeneities are present in the medium, the IRX is maintained at higher levels during the late SNR evolution at radiative phase due to replenishment of the dust in the hot gas from incompletely destroyed fragments behind the shock front. We showed that the evolution of the {𝑇X −IRX} diagram is determined by the onset of the radiative phase. We illustrated that decreasing gas metallicity or density leads to high values of temperature and IRX ratio. We discuss how our results can be applied to the observational data to analyse the SNR older than 10 kyr (i. e. when the mass of the swept-up dust in the shell is expected to exceed that produced in the SNR) in the Galaxy and Large Magellanic Cloud.
Keywords
About the authors
S. Yu. Dedikov
P. N. Lebedev Physical Institute of the Russian Academy of Sciences
Email: s.dedikov@asc.rssi.ru
Moscow, Russia
E. O. Vasiliev
P. N. Lebedev Physical Institute of the Russian Academy of Sciences
Email: eugstar@mail.ru
Moscow, Russia
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