Cosmic-ray-induced ionization in molecular clouds adjacent to supernova remnants

Schuppan, F.; Tjus, J. Becker; Black, J. H.; Casanova, Sabrina; Mandelartz, M.

アイテム詳細

登録内容を編集ファイル形式で保存

一時保存へ追加

タグ情報を表示リリース履歴を表示詳細要約

公開

会議論文

Cosmic-ray-induced ionization in molecular clouds adjacent to supernova remnants

MPS-Authors

/persons/resource/persons30369

Casanova, Sabrina
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

External Resource

There are no locators available

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

フルテキスト (公開)

1209.1197.pdf
(プレプリント), 171KB

付随資料 (公開)

There is no public supplementary material available

引用

Schuppan, F., Tjus, J. B., Black, J. H., Casanova, S., & Mandelartz, M. (2013). Cosmic-ray-induced ionization in molecular clouds adjacent to supernova remnants. In O., Reimer, & D., Torres (Eds.), Cosmic Ray induced phenomenology in star-forming Environments: Proceedings of the 2nd Session of the Sant Cugat Forum of Astrophysics (pp. 317-324). Springer.

引用: https://hdl.handle.net/11858/00-001M-0000-0014-6E86-9

要旨

Energetic gamma rays (GeV to TeV photon energy) have been detected toward several supernova remnants (SNR) that are associated with molecular clouds. If the gamma rays are produced mainly by hadronic processes rather than leptonic processes like bremsstrahlung, then the flux of energetic cosmic ray nuclei (>1 GeV) required to produce the gamma rays can be inferred at the site where the particles are accelerated in SNR shocks. It is of great interest to understand the acceleration of the cosmic rays of lower energy (<1 GeV) that accompany the energetic component. These particles of lower energy are most effective in ionizing interstellar gas, which leaves an observable imprint on the interstellar ion chemistry. A correlation of energetic gamma radiation with enhanced interstellar ionization can thus be used to support the hadronic origin of the gamma rays and to constrain the acceleration of ionizing cosmic rays in SNR. Using observational gamma ray data, the primary cosmic ray proton spectrum can be modeled for E >1 GeV, and careful extrapolation of the spectrum to lower energies offers a method to calculate the ionization rate of the molecular cloud.