Naslov
Missing Fe: hydrogenated iron nanoparticles

Autori
Bilalbegović, Goranka ; Maksimović, Aleksandar ; Mohaček-Grošev, Vlasta

Izvornik
Monthly notices of the Royal Astronomical Society (0035-8711) 466 (2017), 1; L14-L18

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
ISM: molecules ; ISM: lines and bands ; astrochemistry ; methods: numerical ; ISM: magnetic fields ; stars: individual: IRC+10216

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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