The Role of Outflow Feedback on Accretion of Compact Objects in Accretion Disk of Active Galactic Nuclei
Compact objects (COs) can exist and evolve in an active galactic nuclei (AGN) disk, triggering a series of attractive CO-related multimessenger events around a supermassive black hole. To better understand the nature of an embedded CO and its surroundings and to investigate CO-related events more ac...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/acc45f |
| _version_ | 1797700836850139136 |
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| author | Ken Chen Jia Ren Zi-Gao Dai |
| author_facet | Ken Chen Jia Ren Zi-Gao Dai |
| author_sort | Ken Chen |
| collection | DOAJ |
| description | Compact objects (COs) can exist and evolve in an active galactic nuclei (AGN) disk, triggering a series of attractive CO-related multimessenger events around a supermassive black hole. To better understand the nature of an embedded CO and its surroundings and to investigate CO-related events more accurately, in this paper, we study the specific accretion process of a CO in an AGN disk and explore the role of outflow feedback. We show that the asymptotically isotropic outflow generated from the CO hyper-Eddington accretion would truncate the circum-CO disk and push out its surrounding gas, resulting in recurrent formation and refilling of an outflow cavity to intermittently stop the accretion. Applying this universal cyclic process to black holes (BHs) and neutron stars (NSs), we find that, even if it is above the Eddington rate, the mass rate accreted onto a BH is dramatically reduced compared with the initial gas captured rate and thus consumes little mass of the AGN disk; outflow feedback on an NS is generally similar, but possesses complexities on the existence of a stellar magnetic field and hard surface. We demonstrate that although outflow feedback itself may be unobservable, it remarkably alters the CO evolution via reducing its mass growth rate, and the AGN disk can survive from the otherwise drastic CO accretion overlooking outflow. In addition, we discuss the potential influence of an underdense cavity on CO-related events, which embodies the significant role of outflow feedback as well. |
| first_indexed | 2024-03-12T04:27:19Z |
| format | Article |
| id | doaj.art-e477480940734635a5c5ced9e5357042 |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-03-12T04:27:19Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj.art-e477480940734635a5c5ced9e53570422023-09-03T10:16:33ZengIOP PublishingThe Astrophysical Journal1538-43572023-01-01948213610.3847/1538-4357/acc45fThe Role of Outflow Feedback on Accretion of Compact Objects in Accretion Disk of Active Galactic NucleiKen Chen0https://orcid.org/0000-0001-8955-0452Jia Ren1https://orcid.org/0000-0002-9037-8642Zi-Gao Dai2https://orcid.org/0000-0002-7835-8585School of Astronomy and Space Science, Nanjing University , Nanjing 210023, People's Republic of ChinaSchool of Astronomy and Space Science, Nanjing University , Nanjing 210023, People's Republic of ChinaSchool of Astronomy and Space Science, Nanjing University , Nanjing 210023, People's Republic of China; Department of Astronomy, School of Physical Sciences, University of Science and Technology of China , Hefei 230026, People's Republic of China ; dzg@nju.edu.cn, daizg@ustc.edu.cnCompact objects (COs) can exist and evolve in an active galactic nuclei (AGN) disk, triggering a series of attractive CO-related multimessenger events around a supermassive black hole. To better understand the nature of an embedded CO and its surroundings and to investigate CO-related events more accurately, in this paper, we study the specific accretion process of a CO in an AGN disk and explore the role of outflow feedback. We show that the asymptotically isotropic outflow generated from the CO hyper-Eddington accretion would truncate the circum-CO disk and push out its surrounding gas, resulting in recurrent formation and refilling of an outflow cavity to intermittently stop the accretion. Applying this universal cyclic process to black holes (BHs) and neutron stars (NSs), we find that, even if it is above the Eddington rate, the mass rate accreted onto a BH is dramatically reduced compared with the initial gas captured rate and thus consumes little mass of the AGN disk; outflow feedback on an NS is generally similar, but possesses complexities on the existence of a stellar magnetic field and hard surface. We demonstrate that although outflow feedback itself may be unobservable, it remarkably alters the CO evolution via reducing its mass growth rate, and the AGN disk can survive from the otherwise drastic CO accretion overlooking outflow. In addition, we discuss the potential influence of an underdense cavity on CO-related events, which embodies the significant role of outflow feedback as well.https://doi.org/10.3847/1538-4357/acc45fCompact objectsNeutron starsActive galactic nucleiAccretionBlack holes |
| spellingShingle | Ken Chen Jia Ren Zi-Gao Dai The Role of Outflow Feedback on Accretion of Compact Objects in Accretion Disk of Active Galactic Nuclei The Astrophysical Journal Compact objects Neutron stars Active galactic nuclei Accretion Black holes |
| title | The Role of Outflow Feedback on Accretion of Compact Objects in Accretion Disk of Active Galactic Nuclei |
| title_full | The Role of Outflow Feedback on Accretion of Compact Objects in Accretion Disk of Active Galactic Nuclei |
| title_fullStr | The Role of Outflow Feedback on Accretion of Compact Objects in Accretion Disk of Active Galactic Nuclei |
| title_full_unstemmed | The Role of Outflow Feedback on Accretion of Compact Objects in Accretion Disk of Active Galactic Nuclei |
| title_short | The Role of Outflow Feedback on Accretion of Compact Objects in Accretion Disk of Active Galactic Nuclei |
| title_sort | role of outflow feedback on accretion of compact objects in accretion disk of active galactic nuclei |
| topic | Compact objects Neutron stars Active galactic nuclei Accretion Black holes |
| url | https://doi.org/10.3847/1538-4357/acc45f |
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