Cosmic ray acceleration and gamma-ray emission from protostellar jets

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F22%3A00582019" target="_blank" >RIV/67985815:_____/22:00582019 - isvavai.cz</a>

Result on the web

<a href="https://pos.sissa.it/395/684/pdf" target="_blank" >https://pos.sissa.it/395/684/pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.22323/1.395.0684" target="_blank" >10.22323/1.395.0684</a>

Result language

angličtina

Original language name

Cosmic ray acceleration and gamma-ray emission from protostellar jets

Original language description

The detection of synchrotron radio emission from jets powered by massive protostars indicates the presence of relativistic electrons and magnetic fields of strength ∼0.3-5 mG. We study diffusive shock acceleration and magnetic field amplification in protostellar jets with speed 1000 km s-1. We show that the magnetic field in the synchrotron emitter can be amplified by the non-resonant hybrid (Bell) instability excited by the cosmic-ray streaming. By combining the synchrotron data with basic theory of Bell instability we estimate the magnetic field in the synchrotron emitter and the maximum energy of protons. Protons can achieve maximum energies ∼ 0.1 TeV and emit γ rays in their interaction with matter fields. We predict detectable levels of γ rays in IRAS 16547-5247 and IRAS 16848-4603. The detection of this radiation by the Fermi satellite in the GeV domain and the forthcoming Cherenkov Telescope Array at higher energies may open a new window to study the formation of massive stars, as well as diffusive acceleration and magnetic field amplification in shocks with velocities of about 1000 km s-1

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

<a href="/en/project/GA20-19854S" target="_blank" >GA20-19854S: Particle Acceleration Studies in Astrophysical Jets</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Proceedings of Science

ISBN

—

ISSN

1824-8039

e-ISSN

—

Number of pages

8

Pages from-to

684

Publisher name

Sissa Medilab srl

Place of publication

Trieste

Event location

Berlin

Event date

Jul 12, 2021

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

001081844900004