Morphology and Spectra of the Galactic Supernova Remnant G18.1-0.1 from SRG/eROSITA Data

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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.

作者简介

A. Bykov

Ioffe Physical–Technical Institute, Russian Academy of Sciences

Email: byk@astro.ioffe.ru
St. Petersburg, 194021, Russia

Yu. Uvarov

Ioffe Physical–Technical Institute, Russian Academy of Sciences

Email: uv@astro.ioffe.ru
St. Petersburg, 194021, Russia

M. Gilfanov

Space Research Institute, Russian Academy of Sciences

Email: gilfanov@iki.rssi.ru
Moscow, 117997, Russia

P. Medvedev

Space Research Institute, Russian Academy of Sciences

编辑信件的主要联系方式.
Email: tomedvedev@iki.rssi.ru
Moscow, 117997, Russia

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