Upcoming Pizza Lunches

Número de entradas: 1

16
Noviembre 2018

SEAGLE: Disentangling galaxy formation with strong gravitational lensing


Inicio: 12:15h
Ponente: Sampath Mukherjee
Lugar: Sala Alberto Lobo

The structure and formation of early-type galaxies (ETGs) can be studied in details using the technique of strong gravitational lensing. In particular, analyzing ETGs in hydrodynamical simulations. I will introduce the SEAGLE (i.e. Simulating EAGLE LEnses) pipeline, that approaches the study of galaxy…
Inicio: 12:15h
Ponente: Sampath Mukherjee
Lugar: Sala Alberto Lobo

The structure and formation of early-type galaxies (ETGs) can be studied in details using the technique of strong gravitational lensing. In particular, analyzing ETGs in hydrodynamical simulations. I will introduce the SEAGLE (i.e. Simulating EAGLE LEnses) pipeline, that approaches the study of galaxy formation through strong gravitational lensing, using a suite of high-resolution hydrodynamic simulations, Evolution and Assembly of GaLaxies and their Environments (EAGLE) project, with the aim of inferring their mass density profiles, dark matter (DM) and baryonic content and mass structure on kilo-parsec scales. This involves bridging analytic modeling, hydrodynamic-numerical simulations, and observations in studying the signature of different galaxy formation physics going on. I will present evidence for mass fluctuations in the DM halos of lensing galaxies via power spectrum studies and constrain the contribution of DM and baryons in them. This also includes generating synthetic realistic lenses systems corresponding to ongoing and upcoming surveys e.g. KiDS, DES, JWST, LSST, and Euclid, in order to predict what can be expected from them. I will show that the galaxy evolution models with either too weak or too strong stellar and/or AGN feedback fail to explain the distribution of observed mass-density slopes. On the other hand, models with constant stellar feedback, or weaker AGN feedback produce strong lenses with total mass density slopes close to isothermal. Further, I will disentangle the degeneracies among DM and stellar initial mass function (IMF) with new IMF variation simulations of EAGLE.
Institute of Space Sciences (IEEC-CSIC)

Campus UAB, Carrer de Can Magrans, s/n
08193 Barcelona.
Phone: +34 93 737 9788
Email: ice@ice.csic.es
Website developed with RhinOS

Síguenos


An institute of the Consejo Superior de Investigaciones Científicas

An institute of the Consejo Superior de Investigaciones Científicas
Affiliated with the Institut d'Estudis Espacials de Catalunya

Affiliated with the Institut d'Estudis Espacials de Catalunya