Pair annihilation and radio emission from galactic jet sources: the case of Nova Muscae

Kaiser, Christian; Hannikainen, Diana

doi:10.1046/j.1365-8711.2002.05071.x

Cited by 15 publications

(12 citation statements)

References 27 publications

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“…The topological self-screening of u in p The process does not yield the anticipated pion  0 which would indeed have only moderate mass since in the meson, the circulations of linked quark and antiquark pair cancel apart from the lag-phase accrued along their opposite pitches. Thus, the violation of color confinement would require extraordinarily high-energy surroundings to provide the asymptotic freedom [55] for quark-gluon plasma, or the violation of baryon number conservation would require a blazing transformation [56,57].…”

Section: Multiple Actionsmentioning

confidence: 99%

All in Action

Annila

2010

Entropy

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Abstract:The principle of least action provides a holistic worldview in which Nature in its entirety and every detail is described in terms of actions. Each and every action is ultimately composed of one or multiple of the most elementary actions which relates to Planck's constant. Elements of space are closed actions, known as fermions, whereas elements of time are open actions, known as bosons. The actions span an energy landscape, the Universe, which evolves irreversibly according to the 2nd law of thermodynamics by diminishing energy density differences in least time. During evolution densely-curled actions unfold step-by-step when opening up and expelling one or multiple elementary actions to their surrounding sparser space. The energy landscape will process from one symmetry group to another until the equivalence to its dual, i.e., the surrounding density has been attained. The scale-free physical portrayal of nature in terms of actions does not recognize any fundamental difference between fundamental particles and fundamental forces. Instead a plethora of particles and a diaspora of forces are perceived merely as diverse manifestations of a natural selection for various mechanisms and ways to decrease free energy in the least time.

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Section: Multiple Actionsmentioning

confidence: 99%

All in Action

Annila

2010

Entropy

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“…Indeed the discrete character of nature is reflected in mult iplicity at all levels of its hierarchical organization [53]. Ad mittedly, the proton seems immortal in our hands, but the baryon conservation is at stake when matter and quanta of radiation as stoichiometric reactants are drawn in jaws at galactic centers that jet out leptons and γ-rays [54][55][56]. The photon is an apparent ingredient of chemical reactions, but it is the element of any other change of state as well.…”

Section: Discussionmentioning

confidence: 99%

The Meaning of Mass

Annila¹

2012

IJTMP

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Electron, proton and neutron are described in terms of energy densities on least-action paths to show that their charges, magnetic mo ments and masses are man ifestations of quantized geodesics. According to this geometric understanding of matter, the mass of a part icle depends on how much the particle-associated curved path projects onto the straight paths of the universal surrounding energy density. The reference density of free space is embodied by the most elementary actions, the photons in propagation on their least-time paths. The vacuum density with rando m distribution of photon phases displays no electromagnetic field, yet the propagation of its force carriers will level off density differences. This manifests itself as gravitation. Transformations fro m one particle to another, for examp le oscillations, are described according to Noether's theorem as changes from one action to another. This physical portrayal of quantized nature, where every entity comprises mu ltip les of the most elementary action, parallels the atomistic tenet.

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“…The reader can find it in the quoted literature. Suffice it to mention that pair formation via magnetic reconnections has been recently assessed by [Dal Pino et al, 2010], that pair annihilations in neutron-star jet sources have been first reported by [Kaiser & Hannikainen, 2002], that functional regularities in micro-quasars and quasars are described in [Körding et al, 2006[Körding et al, , 2008, and that earlier interpretations of similar kinds of the jet phenomenon were given by [Phil Morrison, 1981], and by [Peter Scheuer, 1996]. Finally, if the CEs of the AGN are BDs rather than BHs, the rare, gigantic, supersoft X-ray outbursts reported by [Komossa, 2005] may have to be re-interpreted as caused by innermost stars on perturbed orbits colliding with the heavy innermost disk of their galaxy.…”

Section: How To Make Jets?mentioning

confidence: 99%

The astrophysical jets (again): as the most complicated inorganic machines known to us

Kundt¹

2018

Proceedings of XII Multifrequency Behaviour of High Energy Cosmic Sources Workshop — PoS(MULTIF2017)

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In this talk (at Mondello), I attempt to sketch again my understanding of the universal working scheme of all the astrophysical jet sources, or 'bipolar flows', on both stellar and galactic scales, also called 'microquasars', and 'quasars'. A crucial building block will be their medium (whenever bare): extremely relativistic e ±-pair plasma performing quasi loss-free E x B-drifts through self-rammed channels, whose guiding equi-partition Eand B-fields convect the electric potential necessary for eventual single-step post-acceleration, at their 'knots' and terminating 'hotspots', or 'heads'. These electromagnetic fields convect half of the jet's power. The indispensible pair plasma is generated in magnetospheric reconnections of the heavy central rotator. For this reason alone, black holes cannot possibly serve as jet engines. During its passage from subsonic to supersonic propagation, still inside its deLaval nozzle, the escaping relativistic pair-plasma passes from a relativistic Maxwellian distribution (almost) to that of a (mono-energetic) Deltafunction, of (uniform) Lorentz-factor γ = 10 2±2. Clearly, this transition in velocity distribution-in transit through the deLaval nozzle-is not loss-free; it turns the jet engine into a transient powerful γ-ray emitter, with photon frequencies reaching up to 10 26 Hz, (corresponding to electron Lorentz factors γ 10 6), see page 120 of [Kundt & Krishna, 2004]. So far, until [Kundt, 2015], all the jets were treated as though propagating in vacuum, as "bare jets". New in 2015 was an allowance for an embedding medium of non-negligible density, most notably encountered in SS 433 (with its fast-moving X-ray and optical spectral lines), but likewise in our Galactic twin jet. Such an embedding medium, gas or plasma, will try to penetrate into the jet channels, but will instead be ionised, expelled, and dragged along by the streaming, extremely relativistic pair plasma, in the form of subrelativistically comoving channel-wall material. In this way, bare jets are converted into (line-and continuum-) emitting "dressed jets ". Unfortunately, in 2015, I had been a bit rush: The generalisation from 'bare' to 'dressed' is not exactly straightforward, and should respect stability constraints, in order to (again) be unique; which I hope to present below, in this my second approach.

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Pair annihilation and radio emission from galactic jet sources: the case of Nova Muscae

Cited by 15 publications

References 27 publications

All in Action

All in Action

The Meaning of Mass

The astrophysical jets (again): as the most complicated inorganic machines known to us

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