X-rays from a Central "Exhaust Vent" of the Galactic Center Chimney
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2023
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| _version_ | 1866917663271288832 |
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| author | Mackey, Scott C. Morris, Mark R. Ponti, Gabriele Anastasopoulou, Konstantina Mondal, Samaresh |
| author_facet | Mackey, Scott C. Morris, Mark R. Ponti, Gabriele Anastasopoulou, Konstantina Mondal, Samaresh |
| contents | Using deep archival observations from the Chandra X-ray Observatory, we present an analysis of linear X-ray-emitting features located within the southern portion of the Galactic center chimney, and oriented orthogonal to the Galactic plane, centered at coordinates l = 0.08 deg, b = -1.42 deg. The surface brightness and hardness ratio patterns are suggestive of a cylindrical morphology which may have been produced by a plasma outflow channel extending from the Galactic center. Our fits of the feature's spectra favor a complex two-component model consisting of thermal and recombining plasma components, possibly a sign of shock compression or heating of the interstellar medium by outflowing material. Assuming a recombining plasma scenario, we further estimate the cooling timescale of this plasma to be on the order of a few hundred to thousands of years, leading us to speculate that a sequence of accretion events onto the Galactic Black Hole may be a plausible quasi-continuous energy source to sustain the observed morphology. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2310_02892 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | X-rays from a Central "Exhaust Vent" of the Galactic Center Chimney Mackey, Scott C. Morris, Mark R. Ponti, Gabriele Anastasopoulou, Konstantina Mondal, Samaresh High Energy Astrophysical Phenomena Using deep archival observations from the Chandra X-ray Observatory, we present an analysis of linear X-ray-emitting features located within the southern portion of the Galactic center chimney, and oriented orthogonal to the Galactic plane, centered at coordinates l = 0.08 deg, b = -1.42 deg. The surface brightness and hardness ratio patterns are suggestive of a cylindrical morphology which may have been produced by a plasma outflow channel extending from the Galactic center. Our fits of the feature's spectra favor a complex two-component model consisting of thermal and recombining plasma components, possibly a sign of shock compression or heating of the interstellar medium by outflowing material. Assuming a recombining plasma scenario, we further estimate the cooling timescale of this plasma to be on the order of a few hundred to thousands of years, leading us to speculate that a sequence of accretion events onto the Galactic Black Hole may be a plausible quasi-continuous energy source to sustain the observed morphology. |
| title | X-rays from a Central "Exhaust Vent" of the Galactic Center Chimney |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2310.02892 |