Bhjet: a public multi-zone, steady state jet + thermal corona spectral model

Abstract

Accreting black holes are sources of major interest in astronomy, particular those launching jets because of their ability to accelerate particles, and dramatically affect their surrounding environment up to very large distances. The spatial, energy and time scales at which a central active black hole radiates and impacts its environment depend on its mass. The implied scale-invariance of accretion/ejection physics between black hole systems of different central masses has been confirmed by several studies. Therefore, designing a self-consistent theoretical model that can describe such systems, regardless of their mass, is of crucial importance to tackle a variety of astrophysical sources. We present here a new and significantly improved version of a scale invariant, steady-state, multi-zone jet model, which we rename bhjet, resulting from the efforts of our group to advance the modelling of black hole systems. We summarise the model assumptions and basic equations, how they have evolved over time, and the additional features that we have recently introduced. These include additional input electron populations, the extension to cyclotron emission in near-relativistic regime, an improved multiple inverse Compton scattering method, external photon seeds typical of AGN and a magnetically-dominated jet dynamical model as opposed to the pressure-driven jet configuration present in older versions. In this paper, we publicly release the code on Github and, in order to facilitate the user's approach to its many possibilities, showcase a few applications as a tutorial.

28 pages, 16 figures, accepted for publication on MNRAS, code available at https://github.com/matteolucchini1/BHJet/, updated to the latest version of the manuscript

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Cited by in corpus (9)

• The Birth of a Relativistic Jet Following the Disruption of a Star by a Cosmological Black Hole
• Bulk Motions in the Black Hole Jet Sheath as a Candidate for the Comptonizing Corona
• Possible contribution of X-ray binary jets to the Galactic cosmic ray and neutrino flux
• Exploring the role of composition and mass-loading on the properties of hadronic jets
• Hillas meets Eddington: The case for blazars as ultra-high-energy neutrino sources
• Quiescent black hole X-ray binaries as multi-messenger sources
• Repeating X-ray bursts: Interaction between a neutron star and clumps partially disrupted from a planet
• X-ray flares in the long-term light curve of low-luminosity Active Galactic Nucleus M81*
• Computational forms for binary particle interactions at different levels of anisotropy