Variations in the 6.2 μm emission profile in starburst-dominated galaxies : a signature of polycyclic aromatic nitrogen heterocycles (PANHs)?
dc.contributor.author | Canelo, Carla Martinez | pt_BR |
dc.contributor.author | Friaça, Amâncio César Santos | pt_BR |
dc.contributor.author | Sales, Dinalva Aires de | pt_BR |
dc.contributor.author | Pastoriza, Miriani Griselda | pt_BR |
dc.contributor.author | Dutra, Daniel Ruschel | pt_BR |
dc.date.accessioned | 2018-06-21T02:32:27Z | pt_BR |
dc.date.issued | 2018 | pt_BR |
dc.identifier.issn | 0035-8711 | pt_BR |
dc.identifier.uri | http://hdl.handle.net/10183/179611 | pt_BR |
dc.description.abstract | Analyses of the polycyclic aromatic hydrocarbon (PAH) feature profiles, especially the 6.2 μm feature, could indicate the presence of nitrogen incorporated in their aromatic rings. In thiswork, 155 predominantly starburst-dominated galaxies (includingHII regions and Seyferts, for example), extracted from the Spitzer/Infrared Spectrograph ATLAS project, have their 6.2 μmprofiles fitted allowing their separation into the Peeters’ A, B, and C classes. 67 per cent of these galaxies were classified as class A, 31 per cent were as class B, and 2 per cent as class C. Currently, class A sources, corresponding to a central wavelength near 6.22 μm, seem only to be explained by polycyclic aromatic nitrogen heterocycles (PANHs), whereas class B may represent a mix between PAHs and PANHs emissions or different PANH structures or ionization states. Therefore, these spectra suggest a significant presence of PANHs in the interstellar medium (ISM) of these galaxies that could be related to their starburst-dominated emission. These results also suggest that PANHs constitute another reservoir of nitrogen in the Universe, in addition to the nitrogen in the gas phase and ices of the ISM. | en |
dc.format.mimetype | application/pdf | pt_BR |
dc.language.iso | eng | pt_BR |
dc.relation.ispartof | Monthly notices of the royal astronomical society. Oxford. Vol. 475, no. 3 (Apr. 2018), p. 3746–3763 | pt_BR |
dc.rights | Open Access | en |
dc.subject | Galaxias Starburst | pt_BR |
dc.subject | Astrobiology | en |
dc.subject | Astroquímica | pt_BR |
dc.subject | Astrochemistry | en |
dc.subject | ISM : Molecules | en |
dc.subject | Meio interestelar | pt_BR |
dc.subject | Nitrogênio | pt_BR |
dc.subject | Galaxies : ISM | en |
dc.subject | Infrared : Galaxies | en |
dc.title | Variations in the 6.2 μm emission profile in starburst-dominated galaxies : a signature of polycyclic aromatic nitrogen heterocycles (PANHs)? | pt_BR |
dc.type | Artigo de periódico | pt_BR |
dc.identifier.nrb | 001067857 | pt_BR |
dc.type.origin | Estrangeiro | pt_BR |
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