Could the 2.6M⊙ object in GW190814 be a primordial black hole?

In June 2020 the LIGO-Virgo collaboration announced the discovery of a strange gravitational wave merger event. It was a merger between a black hole 23 times the mass of the Sun, and a compact object with mass approximately 2.5 times the mass of the Sun. Graduate students Kyriakos Vattis and Isabelle Goldstein working with BTPC/CFPU affiliated faculty member Prof. Koushiappas investigated the possibility of the light object being a primordial black hole, that is a black hole formed right after the big bang.

Deep learning the astrometric signature of dark matter substructure

In an exploratory study, graduate students Kyriakos Vattis and Michael Toomey, together with Prof. Koushiappas (BTPC/CFPU affiliated faculty member) explored whether convolutional neural networks can be used to extract the astrometric signature of dark matter.

CMB constraints on late-universe decaying dark matter as a solution to the H0 tension

Graduate student Kyriakos Vattis together with BTPC postdoc Steven Clark and Prof. Koushiappas (BTPC/CFPU affiliated faculty member) explored the cosmological effects of dark matter that decays to light particles in recent times in the context of the solving the Hubble tension.