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The ESO UVES advanced data products quasar sample – III. Evidence of bimodality in the [N/α] distribution

Tayyaba Zafar,Miriam Centurión,Céline Péroux,Paolo Molaro,Valentina D'Odorico,Giovanni Vladilo,Attila Popping

Monthly Notices of the Royal Astronomical Society（2014）

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Abstract
We report here a study of nitrogen and α-capture element (O, S, and Si) abundances in 18 damped Lyα absorbers (DLAs) and sub-DLAs drawn from the European Southern Observatory's Ultraviolet Visual Echelle Spectrograph (ESO-UVES) Advanced Data Products (EUADP) data base. We report nine new measurements, five upper and four lower limits of nitrogen that when compiled with available nitrogen measureme...
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Key words
galaxies: abundances,galaxies: evolution,galaxies: formation,galaxies: ISM,quasars: absorption lines
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