Shaping Outflows and Jets by Ambient Pressure: a Unified Framework
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866913661601185792 |
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| author | Baan, Willem A. AN, Tao |
| author_facet | Baan, Willem A. AN, Tao |
| contents | Astrophysical outflows are ubiquitous across cosmic scales, from stellar to galactic systems. While diverse launching mechanisms have been proposed, we demonstrate that these outflows share a fundamental commonality: their morphology follows the physics of pressure-confined supersonic flows. By extending classical deLaval nozzle theory to account for ambient pressure gradients, we present a unified framework that successfully describes outflows from young stellar objects to active galactic nuclei. Our model reveals a remarkable consistency in pressure profiles, characterized by a power-law exponent near minus two, independent of the internal characteristics of the outflow or the nature of central engine. This discovery suggests a universal mechanism for outflow collimation and acceleration, bridging the gap between theoretical models and observational features across a wide range of astronomical scales. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2411_11704 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Shaping Outflows and Jets by Ambient Pressure: a Unified Framework Baan, Willem A. AN, Tao Solar and Stellar Astrophysics Astrophysics of Galaxies High Energy Astrophysical Phenomena Astrophysical outflows are ubiquitous across cosmic scales, from stellar to galactic systems. While diverse launching mechanisms have been proposed, we demonstrate that these outflows share a fundamental commonality: their morphology follows the physics of pressure-confined supersonic flows. By extending classical deLaval nozzle theory to account for ambient pressure gradients, we present a unified framework that successfully describes outflows from young stellar objects to active galactic nuclei. Our model reveals a remarkable consistency in pressure profiles, characterized by a power-law exponent near minus two, independent of the internal characteristics of the outflow or the nature of central engine. This discovery suggests a universal mechanism for outflow collimation and acceleration, bridging the gap between theoretical models and observational features across a wide range of astronomical scales. |
| title | Shaping Outflows and Jets by Ambient Pressure: a Unified Framework |
| topic | Solar and Stellar Astrophysics Astrophysics of Galaxies High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2411.11704 |