2022 Fiscal Year Annual Research Report
Interstellar Turbulence by Supermassive Black-Hole Jets, Winds, and Radiation
| Project/Area Number |
19K03862
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| Research Institution | University of Tsukuba |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2023-03-31
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| Keywords | Astrophysics / HPC / Supermassive black holes / Galaxy evolution / Interstellar medium / Relativistic jets / CFD |
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| Outline of Annual Research Achievements |
During the final year of the project we have confirmed, through new numerical simulations and comparison with new observations, that turbulence in galaxies driven by active jets of low to intermediate powers induce appreciable changes in the density distribution, excitation, ionization, and temperature structure of the multi-phase gas in the interstellar medium. This was one of the primary goals set out for this project. Our findings have uncovered a new mode of feedback that is likley relevant in many galaxies that host a radio-jet powered by the central supermassive black hole, since the radio power need not be high to engender noticable changes in the galactic gas properties. Specifically, we have determined that shocks driven by AGN jets are the dominant ionization mechanism in galaxies compared to AGN radiation (Meenakshi et al 2022a), and the resulting ionized gas emission is a predictor for degree of jet-interstellar medium coupling occurring in galaxies (2022b). Our simulations have successfully explained a series of recent multi-wavelength (radio, infra-red, optical, to X-ray) observations, including LINER radio galaxy NGC1167 (Fabbiano et al 2022), the Teacup galaxy (Audibert et al 2022), and the giant radio galaxy J2345-0449 (Drevet-Mullard et al. 2023).
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| Remarks |
All pages above were created solely by myself.
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