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Tetrahedral hydrocarbon nanoparticles in space: X-ray spectra (CROSBI ID 249476)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Bilalbegović, Goranka ; Maksimović, Aleksandar ; Valencic, Lynne Tetrahedral hydrocarbon nanoparticles in space: X-ray spectra // Monthly notices of the Royal Astronomical Society, 476 (2018), 4; 5358-5364. doi: 10.1093/mnras/sty607

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

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Fizika

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