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2025
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| Online Access: | https://doi.org/10.5281/zenodo.17922382 |
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| author | Lahtee, Yaoharee |
| author_facet | Lahtee, Yaoharee |
| contents | <p>Ultra-fast outflows (UFOs) from active galactic nuclei (AGN) are commonly modeled as steady<br>or quasi-steady winds driven by radiation and/or magnetohydrodynamic (MHD) stresses. A recent joint XRISM (Resolve microcalorimeter) + XMM-Newton campaign on the Seyfert 1 galaxy<br>NGC 3783 reported a transient UFO with v ≃ 0.19c emerging during the decay of a soft flare with<br>a sub-day lag, a regime where standard parabolic (diffusive) closures become causality-unsafe for<br>impulsive dynamics. We formulate a minimal telegraph–causal closure for stress/flux transport in<br>a magnetized corona/disc atmosphere, map the observed delay to a finite-speed front propagation<br>and/or relaxation (memory) time, and provide falsifiable diagnostics that separate true launch-lag<br>physics from ionization/recombination “visibility” artifacts. We also state explicit stability/entropy<br>constraints needed for hyperbolic transport to remain physical.<br>Mandatory disclosure. This research is grounded in the framework of informationism, consistent<br>with Wheeler’s ‘It from Bit’ concept (1990) and the informational ontology (Floridi, 2011), which<br>regards information as the fundamental constituent of reality</p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_17922382 |
| institution | Zenodo |
| language | |
| publishDate | 2025 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | The Telegraph–Causal Framework for Ultra-Fast Outflows in NGC 3783 Lahtee, Yaoharee <p>Ultra-fast outflows (UFOs) from active galactic nuclei (AGN) are commonly modeled as steady<br>or quasi-steady winds driven by radiation and/or magnetohydrodynamic (MHD) stresses. A recent joint XRISM (Resolve microcalorimeter) + XMM-Newton campaign on the Seyfert 1 galaxy<br>NGC 3783 reported a transient UFO with v ≃ 0.19c emerging during the decay of a soft flare with<br>a sub-day lag, a regime where standard parabolic (diffusive) closures become causality-unsafe for<br>impulsive dynamics. We formulate a minimal telegraph–causal closure for stress/flux transport in<br>a magnetized corona/disc atmosphere, map the observed delay to a finite-speed front propagation<br>and/or relaxation (memory) time, and provide falsifiable diagnostics that separate true launch-lag<br>physics from ionization/recombination “visibility” artifacts. We also state explicit stability/entropy<br>constraints needed for hyperbolic transport to remain physical.<br>Mandatory disclosure. This research is grounded in the framework of informationism, consistent<br>with Wheeler’s ‘It from Bit’ concept (1990) and the informational ontology (Floridi, 2011), which<br>regards information as the fundamental constituent of reality</p> |
| title | The Telegraph–Causal Framework for Ultra-Fast Outflows in NGC 3783 |
| url | https://doi.org/10.5281/zenodo.17922382 |