| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Godard, Marie
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2022The 3.4 µm absorption band profile : comparison of aliphatic interstellar dust observations and laboratory analogues properties
- 2017Swift heavy ion irradiation of interstellar dust analogues. Small carbonaceous species released by cosmic rayscitations
- 2016Mantle formation, coagulation, and the origin of cloud/core shine. I. Modelling dust scattering and absorption in the infraredcitations
- 2014Hydrogenated amorphous carbons : evolution of interstellar carbon dust
- 2012Effects of cosmic rays on hydrocarbon interstellar dustcitations
- 2011Hydrogenated amorphous carbons: observations, synthesis and characterisation in laboratory of interstellar dust
- 2011Ion irradiation of carbonaceous interstellar analogues. Effects of cosmic rays on the 3.4 μm interstellar absorption bandcitations
- 2011The influence of cosmic rays on the 3.4 microns interstellar absorption band
- 2010Photoluminescence of hydrogenated amorphous carbons: Wavelength-dependent yield and implications for the extended red emissioncitations
- 2009Hydrogenated amorphous carbons photoluminescence and astrophysical implications for the extended red emission
Places of action
| Organizations | Location | People |
|---|
document
The influence of cosmic rays on the 3.4 microns interstellar absorption band
Abstract
IAU Symposium 280, Poster 37, Session 3. ; International audience ; A 3.4 μm absorption band, assigned to aliphatic C-H stretching modes of hydrogenated amorphous carbons (a-C:H), is widely observed in diffuse interstellar medium (ISM), but the only absorption occurring in this wavelength range in dense clouds is a large featureless band at 3.47 μm whose origin and attribution is still debated. Cosmic ray bombardment is one of the interstellar processes destroying the 3.4 μm feature. With the present work, we aim at carefully experimentally investigating the effects of such cosmic rays on the interstellar 3.4 μm absorption band carriers. Samples of carbonaceous interstellar analogs (a-C:H and soot) have been irradiated by swift ions in the MeV range, and monitored by infrared spectroscopy. These ion irradiations result in an effective dehydrogenation and chemical bonding modification of the samples, seen in particular through the decreasing absorbance of the 3.4 μm feature with the fluence (cf. figure). These experimental results allow a proper destruction cross-section determination over a large range of energies. Combined to an ISM cosmic ray distribution, we discuss the implications in different astrophysical environments.