SwissMAP Logo
Log in
  • About us
    • Organization
    • Professors
    • Senior Researchers
    • Postdocs
    • PhD Students
    • Alumni
  • News & Events
    • News
    • Events
    • Online Events
    • Videos
    • Newsletters
    • Press Coverage
    • Perspectives Journal
    • Interviews
  • Research
    • Basic Notions
    • Field Theory
    • Geometry, Topology and Physics
    • Quantum Systems
    • Statistical Mechanics
    • String Theory
    • Publications
    • SwissMAP Research Station
  • Awards, Visitors & Vacancies
    • Awards
    • Innovator Prize
    • Visitors
    • Vacancies
  • Outreach & Education
    • Masterclasses & Doctoral Schools
    • Mathscope
    • Maths Club
    • Athena Project
    • ETH Math Youth Academy
    • SPRING
    • Junior Euler Society
    • General Relativity for High School Students
    • Outreach Resources
    • Exhibitions
    • Previous Programs
    • Events in Outreach
    • News in Outreach
  • Equal Opportunities
    • Mentoring Program
    • Financial Support
    • SwissMAP Scholars
    • Events in Equal Opportunities
    • News in Equal Opportunities
  • Contact
    • Corporate Design
  • Basic Notions
  • Field Theory
  • Geometry, Topology and Physics
  • Quantum Systems
  • Statistical Mechanics
  • String Theory
  • Publications
  • SwissMAP Research Station

Small scale effects in the observable power spectrum at large angular scales

William L. Matthewson, Ruth Durrer

1/7/21 Published in : arXiv:2107.00467

In this paper we show how effects from small scales enter the angular-redshift power spectrum C_\ell(z,z'). In particular, we show that spectroscopic surveys with high redshift resolution are affected by small scales already on large angular scales, i.e. at low multipoles. Therefore, when considering the angular power spectrum with spectroscopic redshift resolution, it is important to account for non-linearities relevant on small scales even at low multipoles. This may also motivate the use of the correlation function instead of the angular power spectrum. These effects, which are very relevant for bin auto-correlations, but not so important for cross-correlations, are quantified in detail.

Entire article

Research project(s)

  • String Theory
  • Field Theory

Image Rotation from weak Lensing

Stable cohomology of graph complexes

  • Leading house

  • Co-leading house


© SwissMAP 2022 - All rights reserved