Contributed Talk - Splinter SNR
Tuesday, 12 September 2023, 15:00 (H 2035)
Decomposing the diffuse soft X-ray emission with eROSITA
Michael Yeung (1), Gabriele Ponti (2,1), Michael Freyberg (1), Nicola Locatelli (2)
(1) Max-Planck-Institut für extraterrestrische Physik, (2) INAF-Osservatorio Astronomico di Brera
The diffuse soft X-ray emission is believed to be a combination of the local hot bubble (LHB), the circumgalactic medium of the Milky Way (CGM), the cosmic X-ray background (CXB), and with growing evidence recently, a hotter thermal component some called the Galactic corona, as well as a time-variable solar wind charge exchange contribution. eROSITA combines an all-sky survey with a good spectral resolution (~50eV FWHM) to allow for an all-sky spectral decomposition of these components. While this is an ongoing work, I will present the methodology and some initial results on how the parameters such as the temperature and emission measure of LHB and CGM are distributed on the western Galactic hemisphere. In particular, I will show an updated 3D model of the LHB as a result of our spectral analysis.