Observations of scattered X-rays from the Central Molecular Zone suggest that Sagittarius A* was much more active in the past, and moreover provide an approximate map of the location of the illuminated molecular clouds in the Galactic Centre.
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Acknowledgements
The author acknowledges M. Morris for comments that greatly improved the quality of the manuscript, as well as funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement no. 865637) and support from Bando per il Finanziamento della Ricerca Fondamentale 2022 dell’Istituto Nazionale di Astrofisica (INAF): GO Large program.
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Ponti, G. Echo-tomography of the heart of the Milky Way. Nat Astron 7, 763–764 (2023). https://doi.org/10.1038/s41550-023-01991-1
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DOI: https://doi.org/10.1038/s41550-023-01991-1
