Fredagskollokvium: Cosmic Voids With Massive Neutrinos and Modified Gravity

Renate Mauland-Hus, PhD student at Institute of Theoretical Astrophysics, University of Oslo.

Tid og sted: – , Peisestua (room 304), Svein Rosselands Hus / Zoom
portrettbildet av en ung smilende kvinne
Renate Mauland-Hus, PhD student in Cosmology and Extragalactic Astronomy, ITA. Photo credits: ITA/UiO.

Massive neutrinos and modified gravity have a degenerate effect on the clustering of matter at small scales. A possible way to study this is with cosmic voids, which are vast underdense regions in the large scale structure.
These regions are sensitive to diffuse components of the universe, such as massive neutrinos, and simultaneously experience effects of modified gravity in a way that is less affected by screening mechanisms. The current modelling of the void-galaxy cross correlation function works well for a \(\Lambda\)CDM universe. However, it is unclear if this is still the case for other cosmologies.

In my talk, I will discuss how the model performs if we apply it directly to data from simulations which contain massive neutrinos and modified gravity.

 

image from a simulation of cosmic web, bright red and purple dots on a dark background.
Large scale structure of the cdm particles in a \(\Lambda\)CDM simulation run with the RAMSES N-body code. Image: Renate Mauland-Hus.

This Friday colloquium will be hybrid. Attendees can therefore participate either in-person or via Zoom. Please join via Zoom at

https://uio.zoom.us/j/69001043754?pwd=cEJpbVE5ci9PdWNtRld2TDNNcGtKdz09

Meeting ID: 690 0104 3754

Passcode: PeiseStua3

Attendees will be muted during the colloquium, but will have the opportunity to ask questions at the end by clicking on the "raise hand” button (or send a request via chat).

Emneord: fredagskollokvium, institute seminar, Kosmologi, Cosmology, cosmic web, Simulations
Publisert 7. nov. 2022 10:51 - Sist endret 7. nov. 2022 10:51
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