Speaker
Sofia Blomqvist
(University of Helsinki)
Description
I will present results from a recent model-agnostic analysis of the neutron-star-matter equation of state (EoS), informed by both ab-initio theoretical limits and astrophysical observations. Allowing for explicit first-order phase transitions, we systematically search for twin-star solutions, i.e. stars of equal mass but differing radii. We find that current constraints exclude all but two classes of twins, which are themselves highly constrained and associated with very small Bayes factors. In particular, our results firmly rule out the standard twin-star scenario, in which the onset of the second branch is directly linked to deconfinement, and suggest that even the remaining solutions may well be excluded with future data.
Primary authors
Aleksi Vuorinen
(University of Helsinki)
Christian Ecker
(Goethe Universität)
Sofia Blomqvist
(University of Helsinki)
Tyler Gorda
(The Ohio State University)
