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Showing 1 to 1 of 1 for “"NGC 7023"”.
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Revisiting polycyclic aromatic hydrocarbon emission in Photodissociation regions
… in two well-known Galactic reflection nebulae, NGC 2023 and NGC 7023, using a Principal Component Analysis. We find that the amount of PAH emission, which represents the PAH abundance and excitation, and the PAH charge state are the only two parameters that drive their behaviour in both …