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  Exclusion of cosmic rays from molecular clouds by self-generated electric fields

Silsbee, K., & Ivlev, A. V. (2020). Exclusion of cosmic rays from molecular clouds by self-generated electric fields. The Astrophysical Journal Letters, 902(1): L25. doi:10.3847/2041-8213/abbc20.

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Exclusion of cosmic rays from molecular clouds by self-generated electric fields.pdf (beliebiger Volltext), 293KB
 
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 Urheber:
Silsbee, Kedron1, Autor           
Ivlev, Alexej V.1, Autor           
Affiliations:
1Center for Astrochemical Studies at MPE, MPI for Extraterrestrial Physics, Max Planck Society, ou_1950287              

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 Zusammenfassung: It was recently discovered that in some regions of the Galaxy, the cosmic-ray (CR) abundance is several orders of magnitude higher than previously thought. Additionally, there is evidence that in molecular cloud envelopes, the CR ionization may be dominated by electrons. We show that for regions with high, electron-dominated ionization, the penetration of CR electrons into molecular clouds is modulated by the electric field that develops as a result of the charge they deposit. We evaluate the significance of this novel mechanism of self-modulation and show that the CR penetration can be reduced by a factor of a few to a few hundred in high-ionization environments, such as those found near the Galactic center.

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 Datum: 2020-10-13
 Publikationsstatus: Online veröffentlicht
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 Identifikatoren: DOI: 10.3847/2041-8213/abbc20
Anderer: LOCALID: 3270578
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Titel: The Astrophysical Journal Letters
  Andere : Astrophys. J. Lett.
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Chicago, IL : University of Chicago Press for the American Astronomical Society
Seiten: - Band / Heft: 902 (1) Artikelnummer: L25 Start- / Endseite: - Identifikator: ISSN: 2041-8205
CoNE: https://pure.mpg.de/cone/journals/resource/954922828215