Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: State-of-the-art energetic and morphological modelling of the launching
  site of the M87 jet   M87 has been the target of numerous astronomical observations across the
electromagnetic spectrum and Very Long Baseline Interferometry (VLBI) resolved
an edge-brightened jet. However, the origin and formation of its jets remain
unclear. In our current understand black holes (BH) are the driving engine of
jet formation, and indeed the recent Event Horizon Telescope (EHT) observations
revealed a ring-like structure in agreement with theoretical models of
accretion onto a rotating Kerr BH. In addition to the spin of the BH being a
potential source of energy for the launching mechanism, magnetic fields are
believed to play a key role in the formation of relativistic jets. A priori,
the spin, $a_\star$, of BH in M87* is unknown, however, when accounting for the
estimates on the X-ray luminosity and jet power, values $\left |a_\star \right|
\gtrsim 0.5$ appear favoured. Besides the properties of the accretion flow and
the BH spin, the radiation microphysics including the particle distribution
(thermal and non-thermal) as well as the particle acceleration mechanism play a
crucial role. We show that general-relativistic magnetohydrodynamics
simulations and general-relativistic radiative transfer calculations can
reproduce the broadband spectrum from the radio to the near-infrared regime and
simultaneously match the observed collimation profile of M87, thus allowing us
to set rough constraints on the dimensionless spin of M87* to be $0.5\lesssim
a_{\star}\lesssim 1.0$, with higher spins being possibly favoured.

25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph