The Influence of Heavy Cosmic Rays in Energy Deposition in Molecular Clouds Employing the GEANT4 Code and Voyager I Data
| dc.contributor.author | Pilling, Sergio | |
| dc.contributor.author | Pazianotto, Maurício Tizziani | |
| dc.contributor.author | Souza, Lucas Alves de | |
| dc.date.accessioned | 2025-04-08T17:52:54Z | |
| dc.date.available | 2025-04-08T17:52:54Z | |
| dc.date.issued2 | 2021 | |
| dc.description.abstract | Galactic and extragalactic cosmic rays fully illuminate and trigger several physical and physicochemical changes in molecular clouds (MCs), including gas and grain heating, molecular destruction and formation, and molecular and atomic desorption (sputtering) from dust/ices to gas phase. Besides the major component in cosmic ray inventory (in flux) being electrons, protons, and alphas, particles with larger atomic numbers have a higher rate of energy delivery (due to richer cosmic ray showers) than the lighter particles, and this may add extra energy input into MCs. To understand this issue, we perform complementary calculations to the previous work on MCs, now adding the heavy ions (12 ≤ Z ≤ 29) in the cosmic ray incoming inventory. Once more, the calculations were performed employing the Monte Carlo toolkit GEANT4 code (considering nuclear and hadron physics). We observe that most projectiles in the heavy ion group have lower deposited energies (roughly 10 times less) than iron with the exception of magnesium (Z = 12) and silicon (Z = 14) which are about double. Cobalt presents the lowest deposited energies with respect to iron (only 0.5%). The total energy deposition in the current model was only roughly 10% higher (outer layers) and virtually the same at the center of the cloud when compared with the previous model (with only protons + alphas + electrons sources). The results show that energy deposition by heavy ions is small compared with the values from light particles, and also suggest a very low temperature enhancement due to heavy ions within the MC, being the protons the dominant agent in the energy delivery and also in the cloud's heating. | |
| dc.description.physical | 4 p. | |
| dc.description.sponsorship | Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) | |
| dc.description.sponsorship | Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) | |
| dc.description.uri | CNPq (projects #306145/ 2015-4; #302985/2018-2) FAPESP (project #2019/13577-0) | |
| dc.format.mimetype | ||
| dc.identifier.affiliation | Universidade do Vale do Paraíba | |
| dc.identifier.affiliation | Instituto Tecnológico de Aeronáutica | |
| dc.identifier.bibliographicCitation | PILLING, Sergio; PAZIANOTTO, Maurício Tizziani; SOUZA, Lucas Alves de. The Influence of Heavy Cosmic Rays in Energy Deposition in Molecular Clouds Employing the GEANT4 Code and Voyager I Data. The Astrophysical Journal, v. 921, n. 2, p. 1-4, 2021. Disponível em: https://iopscience.iop.org/article/10.3847/1538-4357/ac1ba6. | |
| dc.identifier.doi | 10.3847/1538-4357/ac1ba6 | |
| dc.identifier.uri | https://repositorio.univap.br/handle/123456789/826 | |
| dc.language.iso | en_US | |
| dc.publisher | IOP science | |
| dc.rights.holder | The Astrophysical Journal | |
| dc.subject.keyword | Cosmic Rays | |
| dc.title | The Influence of Heavy Cosmic Rays in Energy Deposition in Molecular Clouds Employing the GEANT4 Code and Voyager I Data | |
| dc.type | Artigos de Periódicos |
Arquivos
Pacote Original
1 - 1 de 1
Carregando...
- Nome:
- The Influence of Heavy Cosmic Rays in Energy Deposition in Molecular Clouds Employing the GEANT4 Code and Voyager I Data.pdf
- Tamanho:
- 451.42 KB
- Formato:
- Adobe Portable Document Format
Licença do Pacote
1 - 1 de 1
Nenhuma Miniatura disponível
- Nome:
- license.txt
- Tamanho:
- 1.71 KB
- Formato:
- Item-specific license agreed upon to submission
- Descrição: