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  • NAM2021
    • Contacts
  • Science
    • Science Programme
    • Plenary Talks
    • Parallel Sessions
    • Special Lunches/Discussion Sessions
    • Poster Session
    • NAM Community Session
  • Social
    • Presidential Address
    • Herschel Concert
    • RAS Awards Ceremony
    • Virtual Stonehenge Tour
  • Media
  • Public Engagement
    • Public engagement opportunities
    • Public talk
    • Writing Skyscapes
  • Venue
    • Code of Conduct
    • Accessing the conference
    • Gather.town
    • NAM2021 Slack
    • About Bath

Poster

id
Galaxy Cluster Masses, Galaxy+Quasar Bias and Dark Haloes via Quasar Lensing
DM Lensing
Alice
Eltvedt
Date Submitted
2021-04-30 00:00:00
Durham University
Alice Eltvedt (Durham), Tom Shanks (Durham), Nigel Metcalfe (Durham), Behzad Ansarinejad (Durham)
In this talk I present lensing results from the cross correlation of the VST ATLAS quasar catalogue with galaxy and galaxy cluster catalogues. We also detect strong Quasar - Planck CMB lensing. The quasar-galaxy cross-correlation allows us to fit models to our data to calculate the galaxy bias as a test of the ΛCDM model. We also fit halo models to our data in order to calculate galaxy cluster halo masses and predict velocity dispersions. The Quasar-CMB cross-correlations provide a direct measurement of the quasar bias and quasar host halo masses. We shall also consider the possibility of searching for dark matter haloes using quasar variability data from quasar catalogues from VST ATLAS, KiDS and ultimately the Vera Rubin LSST. We aim to present results from a pilot study using quasar variability data from a new CTIO DECam survey.

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