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Dida Markovič

I'm a research fellow at the ICG - Portsmouth University.
I work on Euclid and Entropy.

I'm a research scientist working on the European Space Agency’s Euclid Space telescope. I study the dark sector of the universe - dark energy and dark matter, which govern 95% of all the gravitational interactions in the universe, yet present a mystery to science. I finished my PhD at the Max Planck Institute for Extraterrestrial Physics in Munich in 2013. My work has been published in science journals like the Monthly Notices of the Royal Astronomical Society and Physics Review D. I regularly present my work at international scietific conferences. I'm based at the Institute of Cosmology and Gravitation in Portsmouth, UK.


Euclid's dark universe

The discovery of a so-called dark sector in cosmology resolved inconsistencies between cosmological theory and observation, but it also triggered many new questions. The existence of cold dark matter explains gravitational effects beyond what is accounted for by the observed luminous matter in the Universe. The presence of the cosmological constant, Λ, accounts for observed late-time accelerated expansion of space-time. Together they form the basis of the standard model of cosmology: ΛCDM. The most sought after discoveries in the field will provide insight into the little-understood nature of these dark components.

Since 2014, my research has been focussed on optimising the Euclid mission to make such a pivotal breakthrough, because in the early 2020's, the Euclid galaxy survey will provide an order-of-magnitude leap in our ability to understand the dark sector.

In the past, I have been particularly interested in relaxing the assumption that dark matter is cold to include the possibility of warm dark matter (WDM). In the WDM scenario the dark matter particles stay thermodynamically coupled to the primordial plasma long enough to receive energy from particle annihilation and stay relativistic longer, affecting the distribution of cosmological energy density fluctuations on detectable scales.


The story of Entropy

Entropy is the cosmic story of creation. The project is an collaboration of art and science. It frames a scientific lecture about modern cosmology with a live immersive performance. The best way to describe it: a live astronomy documentary that crashed an electronic music gig. The Entropy project presents science to the public as an entirely new experience that appeals to science, music and art fans alike.

The laws of thermodynamics say that the entropy of a system must never decrease with time. For this reason, some scientists and philosophers believe that entropy - the amount of disorder in a system - is what makes us humans perceive the flow of time. Our project is named after entropy - our arrow of time, our guide through the story of existence.

The project is funded by Science and Technology Facilities Council, UK and Arcadi (Ile-de-France). The Entropy code is on GitHub. Entropy tweets on Twitter. And sometimes even emails back!