The origin of the most energetic galactic cosmic rays: supernova explosions into massive star plasma winds

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F19%3A00546545" target="_blank" >RIV/68378271:_____/19:00546545 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.3390/galaxies7020048" target="_blank" >https://doi.org/10.3390/galaxies7020048</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/galaxies7020048" target="_blank" >10.3390/galaxies7020048</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The origin of the most energetic galactic cosmic rays: supernova explosions into massive star plasma winds

Popis výsledku v původním jazyce

We propose that the high energy Cosmic Ray particles up to the upturn commonly called the ankle, from around the spectral turn-down commonly called the knee, mostly come from Blue Supergiant star explosions. At the upturn, i.e., the ankle, Cosmic Rays probably switch to another source class, most likely extragalactic sources. To show this we recently compiled a set of Radio Supernova data where we compute the magnetic field, shock speed and shock radius. This list included both Blue and Red Supergiant star explosions, both data show the same magnetic field strength for these two classes of stars despite very different wind densities and velocities. Using particle acceleration theory at shocks, those numbers can be transformed into characteristic ankle and knee energies. Without adjusting any free parameters both of these observed energies are directly indicated by the supernova data. In the next step in the argument, we use the Supernova Remnant data of the starburst galaxy M82.

Název v anglickém jazyce

The origin of the most energetic galactic cosmic rays: supernova explosions into massive star plasma winds

Popis výsledku anglicky

We propose that the high energy Cosmic Ray particles up to the upturn commonly called the ankle, from around the spectral turn-down commonly called the knee, mostly come from Blue Supergiant star explosions. At the upturn, i.e., the ankle, Cosmic Rays probably switch to another source class, most likely extragalactic sources. To show this we recently compiled a set of Radio Supernova data where we compute the magnetic field, shock speed and shock radius. This list included both Blue and Red Supergiant star explosions, both data show the same magnetic field strength for these two classes of stars despite very different wind densities and velocities. Using particle acceleration theory at shocks, those numbers can be transformed into characteristic ankle and knee energies. Without adjusting any free parameters both of these observed energies are directly indicated by the supernova data. In the next step in the argument, we use the Supernova Remnant data of the starburst galaxy M82.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

—

Návaznosti

—

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Galaxies

ISSN

2075-4434

e-ISSN

2075-4434

Svazek periodika

7

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

23

Strana od-do

48

Kód UT WoS článku

000474937600006

EID výsledku v databázi Scopus

2-s2.0-85069923248