Missing Fe: hydrogenated iron nanoparticles (CROSBI ID 233506)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Bilalbegović, Goranka ; Maksimović, Aleksandar ; Mohaček-Grošev, Vlasta
engleski
Missing Fe: hydrogenated iron nanoparticles
Although it was found that the FeH lines exist in the spectra of some stars, none of the spectral features in the ISM have been assigned to this molecule. We suggest that iron atoms interact with hydrogen and produce Fe-H nanoparticles which sometimes contain many H atoms. We calculate infrared spectra of hydrogenated iron nanoparticles using density functional theory methods and find broad, overlapping bands. Desorption of H2 could induce spinning of these small Fe-H dust grains. Some of hydrogenated iron nanoparticles posses magnetic and electric moments and should interact with electromagnetic fields in the ISM. FenHm nanoparticles could contribute to the polarization of the ISM and the anomalous microwave emission. We discuss the conditions required to form FeH and FenHm in the ISM.
ISM: molecules ; ISM: lines and bands ; astrochemistry ; methods: numerical ; ISM: magnetic fields ; stars: individual: IRC+10216
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Podaci o izdanju
466 (1)
2017.
L14-L18
objavljeno
0035-8711
1365-2966
10.1093/mnrasl/slw226