Connecting the cosmic web to Galaxy morphology

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• Christophe Pichon, IAP
• Thursday 22 January 2015, 16:30-17:30
• Sackler Lecture Theatre, IoA (tea at 4:00 pm).

If you have a question about this talk, please contact Simon Hodgkin.

The morphology of galaxies is set by their angular momentum distribution. In turn, filaments of the cosmic web drive the angular momentum acquisition of galaxies. The anisotropic environment set by the web can be used to revisit tidal torque theory near its saddle points. The corresponding constrained mis-alignment between the tidal tensor and the hessian of the density field simply explains the point-symmetric geometry of the angular momentum distribution within filaments. This Lagrangian theory allows us to relate the transition mass corresponding to the alignment of dark matter halos’ spin to this geometry, and to predict accordingly its scaling with the mass of non linearity.

This talk is part of the Institute of Astronomy Colloquia series.

This talk is included in these lists:

• Cambridge Astronomy Talks
• Combined External Astrophysics Talks DAMTP
• Cosmology lists
• Cosmology, Astrophysics and General Relativity
• Institute of Astronomy Colloquia
• Institute of Astronomy Talk Lists
• Kavli Institute for Cosmology Talk Lists
• Priscilla
• Sackler Lecture Theatre, IoA (tea at 4:00 pm)

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