A 2D chemical evolution model shows that spiral density waves produce azimuthal oxygen abundance differences that are small at present and erased within a few billion years, implying observed variations require young spiral arms.
The CALIFA survey: A panoramic view on galaxy properties
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abstract
We present here a brief summary of the status of the on-going CALIFA survey. We have just started the last semester of observing (Spring 2015). So far, we have gathered IFU data of more than 600 galaxies, ~85% of them corresponding to the main CALIFA sample (516 objects). We give an overview of some of the main science results that have been published by the CALIFA team during the last four years. In particular, we emphasise the results regarding the properties of the ionized gas in galaxies and the gradients in oxygen abundance, as well as the evidence for inside-out growth of galaxies uncovered through analysis of the stellar population content.
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2D-Galactic chemical evolution: the role of the spiral density wave
A 2D chemical evolution model shows that spiral density waves produce azimuthal oxygen abundance differences that are small at present and erased within a few billion years, implying observed variations require young spiral arms.