Latest results

On the evolutionary history of a simulated disc galaxy as seen by phylogenetic trees  “The paper seeks to better understand the limits of a novel approach by using phylogenetic methods to dissect the evolutionary history of a simulated disc galaxy. The application of phylogenetics in this realm is promising, it represents an ambitious interdisciplinary journey […]

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Intersection of Disciplines

This line aims at merging the astronomical lines on chemical abundance determination and galaxy evolution modeling by building and analyzing trees and networks. Here is where the key idea of ERIS to apply the principles and methods of phylogenetics to the evolution of galaxies happens. Currently, the well-known distance method known as “Neighbor Joining” clustering

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Chemical Evolution modeling

To understand the impact on phylogenetic trees regarding the role of the various chemicalelements, semi-analytical models of chemical evolution are analyzed. These models includeFlex-CE or L-Galaxies, which take into account the non-linear evolution of a structure in acosmological framework and introduce the physics of baryons by using a set of recipeswhose free parameters are chosen

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Stellar Spectral Analysis

We develop methods to determine chemical composition in stars. ERIS attributes the chemical abundances imprinted in stellar atmospheres as the heritable marker for the phylogenetic signal of galaxy evolution. The problem of determining stellar atmospheric parameters (effective temperature, surface gravity, overall metallicity, etc), and subsequently determining individual chemical abundances, is complex. Despite the rapid development

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ERIS in Australia 

To finish the year, In December 2022, ERIS members managed to meet in the last country where we’re based: Australia. We had the chance to mingle and work!  Paula Jofre, the ERIS director, travelled as part of the “Mt. Stromlo Distinguished visitor programme”, which invites researchers from abroad to visit the Australian National University (ANU).

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Workshop Gaia Benchmark stars

The Núcleo Milenio ERIS, together with the European Southern Observatory (ESO) hosted a workshop entitled “Extending the Gaia Benchmark stars” throughout November. From the 14th until the 18th of the last month and thanks to the collaboration between Ditte Slumstrup and Paula Jofré, it was possible to bring together a team of experts to work

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