Ignacy Sawicki
PhD: |
University of Chicago, 2007 |
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2016- |
Institute of Physics, Czech Academy of Sciences, Senior Researcher |
2014-16 |
University of Geneva; Marie Skłodowska-Curie Fellow |
2014 |
AIMS, Cape Town; Visiting Researcher |
2010-13 |
ITP, University of Heidelberg; Postdoc |
2007-10 |
CCPP, New York University; James Arthur Fellow |
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Email: |
ignacy.sawicki@fzu.cz |
Phone: |
+420 26605 2175 |
Address: |
Office 232 Na Slovance 1999/2 182 21 Praha 8, Czech Republic |
The last two decades of observations have confirmed that the expansion of the universe is accelerating rather than slowing down, as we had expected from the fact that gravity in an attractive force. This mechanism behind this effect is called dark energy.
A simple explanation for dark energy is a cosmological constant, a fundamental property of space time. But could there be a dynamical mechanism responsible for the acceleration? I am interested in searching for such dynamical dark energy models (originating from a modification of gravity or some other mechanism), understanding the extent to which these models can be consistent, and finding methods to discriminate between them that can be used with data from current and upcoming cosmological surveys.
Selected Publications
- E. Bellini and I. Sawicki, Maximal freedom at minimum cost: linear large-scale structure
in general modifications of gravity
JCAP (2014) [arXiv:1404.3713 [astro-ph.CO]]
- L. Amendola, M. Kunz, M. Motta, I. D. Saltas and I. Sawicki, Observables and unobservables
in dark energy cosmologies
Phys. Rev. D (2013) [arXiv:1210.0439 [astro-ph.CO]]
- C. Deffayet, O. Pujolàs, I. Sawicki and A. Vikman, Imperfect Dark Energy from Kinetic Gravity Braiding
JCAP (2010) [arXiv:1008.0048 [hep-th]]
For a complete list of publications see INSPIRE-HEP.