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Black Hole

Lensing of space time around a black hole. At Oxford we study black holes observationally and theoretically on all size and time scales - it is some of our core work.

Credit: ALAIN RIAZUELO, IAP/UPMC/CNRS. CLICK HERE TO VIEW MORE IMAGES.

Dr. Tassia Ferreira

Royal Society Newton International Fellow

Research theme

  • Astronomy and astrophysics
  • Particle astrophysics & cosmology

Sub department

  • Astrophysics

Research groups

  • Beecroft Institute for Particle Astrophysics and Cosmology
  • Cosmology
  • Rubin-LSST
tassia.ferreira@physics.ox.ac.uk
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Feature in Editors' Suggestion of the Physical Review Letters

Image of the webpage featuring the PRL.
Cosmic Correlations Show How Visible Matter Shapes the Universe

A correlation between two astronomical observables reveals the influence of visible matter on a universe dominated by dark matter.

Physics Magazine

I am an observational cosmologist focusing on using weak gravitational lensing to understand the nature of dark matter and dark energy. I am particularly interested in using cross-correlation techniques to combine multi-wavelength observations to obtain information on astrophysical systematics and push weak lensing analyses to smaller scales. This work led to my discovery of a correlation between cosmic shear and the diffuse X-ray background, which can be used to constrain baryonic feedback!

 

I am now at Newcastle University, you can reach me here: tassia.ferreira@ncl.ac.uk or tassia.aferreira@gmail.com 

About me


I am from Salvador, a beautiful coastal city in the northeast of Brazil. I did my undergraduate and master’s in physics at the Federal University of Bahia. I then moved to Vitoria, to the Federal University of Espirito Santo, for my PhD in Astrophysics, Cosmology and Gravitation, with Prof. Valerio Marra as my advisor. During my PhD, I spent a year abroad at Carnegie Mellon University, in Pittsburgh, USA, working with my co-supervisor, Prof. Scott Dodelson. Before coming to Oxford, I was a postdoc at the Interinstitutional Laboratory for e-Astronomy (LIneA), in the National Observatory, Rio de Janeiro.

While I am very happy at the BIPAC, nothing beats the amazing view of the Guanabara Bay, from my office in Rio de Janeiro!

Research interests

Weak lensing
Cross-correlations
Weak lensing systematics
Dark sector
Bayesian inference

Selected publications

X-Ray-Cosmic-Shear Cross-Correlations: First Detection and Constraints on Baryonic Effects.

Physical review letters American Physical Society (APS) 133:5 (2024) 51001
Tassia Ferreira, David Alonso, Carlos Garcia-Garcia, Nora Elisa Chisari

Insights on gas thermodynamics from the combination of x-ray and thermal Sunyaev-Zel’dovich data cross correlated with cosmic shear

Physical Review D American Physical Society (APS) 112:4 (2025) 043525
Adrien La Posta, David Alonso, Nora Elisa Chisari, Tassia Ferreira, Carlos García-García

The IA Guide: A Breakdown of Intrinsic Alignment Formalisms

(2023)
Claire Lamman, Eleni Tsaprazi, Jingjing Shi, Nikolina Niko Šarčević, Susan Pyne, Elisa Legnani, Tassia Ferreira

The N5K challenge: non-limber integration for LSST cosmology

(2023)
C Danielle Leonard, Tassia Ferreira, Xiao Fang, Robert Reischke, Nils Schoeneberg, Tilman Tröster, David Alonso, Jean-Eric Campagne, François Lanusse, Anže Slosar, Mustapha Ishak
See all publications

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