IALP 13078
INSTITUTO DE ASTROFISICA LA PLATA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Siblings, friends and acquaintances: Testing the galaxy association methods
Autor/es:
CASO, JUAN PABLO; VEGA-MARTÍNEZ, CRISTIAN
Lugar:
La Serena
Reunión:
Encuentro; Segunda Reunión Binacional AAA-SOCHIAS; 2018
Institución organizadora:
Universidad de La Serena - Sociedad Chilena de Astronomía
Resumen:
We present preliminary results to test the accuracy of association methods applied to galaxy surveys, in order to constraint their limitations and develop possible alternatives to improve them. We focused in the friends-of-friends (FoF) method, carrying on the analysis on the dark matter cosmological simulation MDPL2, from the Multidark project. Results point to a large fraction of contaminants from the application of the FoF method, particularly for massive haloes in high density environments. Thresholds in the association parameters and the subsequent use of tests for substructures can mitigate the occurance of fake positives.
