HST Observations within the Sphere of Influence of the Powerful Supermassive Black Hole in PKS0745-191
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| Format: | Preprint |
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2025
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| author | Hlavacek-Larrondo, Julie Choi, Hyunseop Guo, Minghao Richard-Laferrière, Annabelle Rhea, Carter Prunier, Marine Russell, Helen Fabian, Andy Walsh, Jonelle L. Gingras, Marie-Joëlle McNamara, Brian Allen, Steve Chené, André-Nicolas Edge, Alastair Gendron-Marsolais, Marie-Lou McDonald, Michael Natarajan, Priyamvada Sanders, Jeremy Steiner, James F. Vigneron, Benjamin von der Linden, Anja |
| author_facet | Hlavacek-Larrondo, Julie Choi, Hyunseop Guo, Minghao Richard-Laferrière, Annabelle Rhea, Carter Prunier, Marine Russell, Helen Fabian, Andy Walsh, Jonelle L. Gingras, Marie-Joëlle McNamara, Brian Allen, Steve Chené, André-Nicolas Edge, Alastair Gendron-Marsolais, Marie-Lou McDonald, Michael Natarajan, Priyamvada Sanders, Jeremy Steiner, James F. Vigneron, Benjamin von der Linden, Anja |
| contents | We present Space Telescope Imaging Spectrograph observations from the Hubble Space Telescope of the supermassive black hole (SMBH) at the center of PKS0745-191, a brightest cluster galaxy (BCG) undergoing powerful radio-mode AGN feedback ($P_{\rm cav}\sim5\times10^{45}$ erg s$^{-1}$). These high-resolution data offer the first spatially resolved map of gas dynamics within a SMBHs sphere of influence under such powerful feedback. Our results reveal the presence of highly chaotic, non-rotational ionized gas flows on sub-kpc scales, in contrast to the more coherent flows observed on larger scales. While radio-mode feedback effectively thermalizes hot gas in galaxy clusters on kiloparsec scales, within the core, the hot gas flow may decouple, leading to a reduction in angular momentum and supplying ionized gas through cooling, which could enhance accretion onto the SMBH. This process could, in turn, lead to a self-regulating feedback loop. Compared to other BCGs with weaker radio-mode feedback, where rotation is more stable, intense feedback may lead to more chaotic flows, indicating a stronger coupling between jet activity and gas dynamics. Additionally, we observe a sharp increase in velocity dispersion near the nucleus, consistent with a very massive $M_{\rm BH}\sim1.5\times10^{10} M_\odot$ SMBH. The density profile of the ionized gas is also notably flat, paralleling the profiles observed in X-ray gas around galaxies where the Bondi radius is resolved. These results provide valuable insights into the complex mechanisms driving galaxy evolution, highlighting the intricate relationship between SMBH fueling and AGN feedback within the host galaxy. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_03339 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | HST Observations within the Sphere of Influence of the Powerful Supermassive Black Hole in PKS0745-191 Hlavacek-Larrondo, Julie Choi, Hyunseop Guo, Minghao Richard-Laferrière, Annabelle Rhea, Carter Prunier, Marine Russell, Helen Fabian, Andy Walsh, Jonelle L. Gingras, Marie-Joëlle McNamara, Brian Allen, Steve Chené, André-Nicolas Edge, Alastair Gendron-Marsolais, Marie-Lou McDonald, Michael Natarajan, Priyamvada Sanders, Jeremy Steiner, James F. Vigneron, Benjamin von der Linden, Anja Astrophysics of Galaxies High Energy Astrophysical Phenomena We present Space Telescope Imaging Spectrograph observations from the Hubble Space Telescope of the supermassive black hole (SMBH) at the center of PKS0745-191, a brightest cluster galaxy (BCG) undergoing powerful radio-mode AGN feedback ($P_{\rm cav}\sim5\times10^{45}$ erg s$^{-1}$). These high-resolution data offer the first spatially resolved map of gas dynamics within a SMBHs sphere of influence under such powerful feedback. Our results reveal the presence of highly chaotic, non-rotational ionized gas flows on sub-kpc scales, in contrast to the more coherent flows observed on larger scales. While radio-mode feedback effectively thermalizes hot gas in galaxy clusters on kiloparsec scales, within the core, the hot gas flow may decouple, leading to a reduction in angular momentum and supplying ionized gas through cooling, which could enhance accretion onto the SMBH. This process could, in turn, lead to a self-regulating feedback loop. Compared to other BCGs with weaker radio-mode feedback, where rotation is more stable, intense feedback may lead to more chaotic flows, indicating a stronger coupling between jet activity and gas dynamics. Additionally, we observe a sharp increase in velocity dispersion near the nucleus, consistent with a very massive $M_{\rm BH}\sim1.5\times10^{10} M_\odot$ SMBH. The density profile of the ionized gas is also notably flat, paralleling the profiles observed in X-ray gas around galaxies where the Bondi radius is resolved. These results provide valuable insights into the complex mechanisms driving galaxy evolution, highlighting the intricate relationship between SMBH fueling and AGN feedback within the host galaxy. |
| title | HST Observations within the Sphere of Influence of the Powerful Supermassive Black Hole in PKS0745-191 |
| topic | Astrophysics of Galaxies High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2501.03339 |