Morphology and Spectra of the Galactic Supernova Remnant G18.1-0.1 from SRG/eROSITA Data
- Authors: Bykov A.M.1, Uvarov Y.A.1, Gilfanov M.R.2, Medvedev P.S.2
-
Affiliations:
- Ioffe Physical–Technical Institute, Russian Academy of Sciences
- Space Research Institute, Russian Academy of Sciences
- Issue: Vol 49, No 1 (2023)
- Pages: 88-94
- Section: Articles
- URL: https://rjsvd.com/0320-0108/article/view/674326
- DOI: https://doi.org/10.31857/S0320010823010023
- EDN: https://elibrary.ru/PKHICP
- ID: 674326
Cite item
Abstract
We present the results of our analysis of the observations of the supernova remnant (SNR) G18.1-0.1 performed with the eROSITA X-ray telescope onboard the SRG observatory within the program of Galactic ridge observations. We have constructed an image that entirely covers the surroundings of the SNR located in the difficult-to-analyze diffuse emission region within the central radian of the Galaxy. The high sensitivity of the X-ray telescope in the 0.5–2.3 keV energy band and its angular resolution
have allowed us to construct for the first time the image and to determine the morphology of the asymmetric extended region of interaction between the ejecta of the supernova G18.1-0.1 and its environment. Our spectral analysis of the diffuse X-ray emission from the SNR, minus the discrete sources, has shown that its spectrum is well fitted by the thermal plasma emission model that takes into account the absorption in the interstellar medium. The plasma temperature
keV and
cm
obtained as a result of our analysis are consistent with their previous estimates. An overabundance of Si, whose abundance is
of the solar one, has been detected in the hot plasma spectrum of G18.1-0.1.
Keywords
About the authors
A. M. Bykov
Ioffe Physical–Technical Institute, Russian Academy of Sciences
Email: byk@astro.ioffe.ru
St. Petersburg, 194021, Russia
Yu. A. Uvarov
Ioffe Physical–Technical Institute, Russian Academy of Sciences
Email: uv@astro.ioffe.ru
St. Petersburg, 194021, Russia
M. R. Gilfanov
Space Research Institute, Russian Academy of Sciences
Email: gilfanov@iki.rssi.ru
Moscow, 117997, Russia
P. S. Medvedev
Space Research Institute, Russian Academy of Sciences
Author for correspondence.
Email: tomedvedev@iki.rssi.ru
Moscow, 117997, Russia
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