Gamma-Rays From Large-Scale Outflows In Starburst Galaxies

Romero, Gustavo E.; Müller, Ana L.

doi:10.22323/1.354.0029

Cited by 3 publications

(2 citation statements)

References 24 publications

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“…Superwinds of starburst galaxies were suggested as possible sites of high-energy CRs acceleration. Ultra-high-energy cosmic rays (UHECR) acceleration up to 10 11 GeV by superwinds of starburst galaxies was discussed by Anchordoqui (2018), while more conservative maximum energies (10 7 GeV for protons) were obtained in the model by Romero and Müller (2019). The latter are consistent with the CR energies accelerated in YMSCs (Bykov 2014), which are expected to be numerous in the starburst galaxies.…”

Section: High-energy Phenomena In Starburst Galaxiesmentioning

confidence: 63%

High-Energy Particles and Radiation in Star-Forming Regions

et al. 2020

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Non-thermal particles and high-energy radiation can play a role in the dynamical processes in star-forming regions and provide an important piece of the multiwavelength observational picture of their structure and components. Powerful stellar winds and supernovae in compact clusters of massive stars and OB associations are known to be favourable sites of high-energy particle acceleration and sources of non-thermal radiation and neutrinos. Namely, young massive stellar clusters are likely sources of the PeV (petaelectronvolt) regime cosmic rays (CRs). They can also be responsible for the cosmic ray composition, e.g., 22 Ne/ 20 Ne anomalous isotopic ratio in CRs. Efficient particle acceleration can be accompanied by super-adiabatic amplification of the fluctuating magnetic fields in the systems converting a part of kinetic power of the winds and supernovae into the magnetic energy through the CR-driven instabilities. The escape and CR propagation in the vicinity of the sources are affected by the non-linear CR feedback. These effects are expected to be important in starburst galaxies, which produce high-energy neutrinos and gamma-rays. We give a brief review of the theoreti-A. M. Bykov

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Section: High-energy Phenomena In Starburst Galaxiesmentioning

confidence: 63%

High-Energy Particles and Radiation in Star-Forming Regions

et al. 2020

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“…It was conjectured that charged particles can be accelerated by bouncing back and forth across this terminal shock up to extremely high energies [2,3]. However, criticisms on the choice of model parameters characterizing the speed of the shock and magnetic field strength were reported in [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Exploring the superwind mechanism for generating ultrahigh-energy cosmic rays using large-scale modeling of starbursts

Anchordoqui

Torres

2020

Phys. Rev. D

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High-energy processes in starburst-driven winds

Müller

Romero

Roth

2020

Monthly Notices of the Royal Astronomical Society

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Starburst galaxies generate large-scale winds powered by the activity in the star-forming regions located in the galactic discs. Fragmentation of the disc produced by the outbreak of the wind results in the formation of clouds. Bowshocks caused by the supersonic outflow appear around such clouds. In this paper, we discuss the acceleration of relativistic particles and the production of non-thermal radiation in such scenario. Cosmic rays accelerated at the bowshocks do not reach the highest energies, although the high-energy luminosity generated is significant. We show that up to ∼10 per cent of the gamma-ray emission in starbursts might come from these sources outside the galactic discs. Discrete X-ray sources with a power-law component are also expected.

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Gamma-Rays From Large-Scale Outflows In Starburst Galaxies

Cited by 3 publications

References 24 publications

High-Energy Particles and Radiation in Star-Forming Regions

High-Energy Particles and Radiation in Star-Forming Regions

Exploring the superwind mechanism for generating ultrahigh-energy cosmic rays using large-scale modeling of starbursts

High-energy processes in starburst-driven winds

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