Tetrahedral hydrocarbon nanoparticles in space: X-ray spectra (CROSBI ID 249476)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Bilalbegović, Goranka ; Maksimović, Aleksandar ; Valencic, Lynne
engleski
Tetrahedral hydrocarbon nanoparticles in space: X-ray spectra
It has been proposed, or confirmed, that diamond nanoparticles exist in various environments in space: close to active galactic nuclei, in the vicinity of supernovae and pulsars, in the interior of several planets in the Solar system, in carbon planets and other exoplanets, carbon-rich stars, meteorites, in X-ray active Herbig Ae/Be stars, and in the interstellar medium. Using density functional theory methods we calculate the carbon K-edge X-ray absorption spectrum of two large tetrahedral nanodiamonds: C26H32 and C51H52. We also study and test our methods on the astrophysical molecule CH4, the smallest C-H tetrahedral structure. A possible detection of nanodiamonds from X-ray spectra by future telescopes, such as the project Arcus, is proposed. Simulated spectra of the diffuse interstellar medium using Cyg X-2 as a source show that nanodiamonds studied in this work can be detected by Arcus, a high resolution X-ray spectrometer mission selected by NASA for a Phase A concept study.
astrochemistry, ISM: molecules, methods: numerical, X-rays: individuals: V892 Tau, HD 97048, Cyg X-2, X-rays: ISM, galaxies: active
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Podaci o izdanju
476 (4)
2018.
5358-5364
objavljeno
0035-8711
1365-2966
10.1093/mnras/sty607