On the Nature of GW190814 and Its Impact on the Understanding of Supranuclear Matter

• The observation of a compact object with a mass of 2.50-2.67M99.9%. Even if we weaken previously employed constraints on the maximum mass of neutron stars, the probability of a binary black hole origin is still similar to 81%. Furthermore, we study the impact that this observation has on our understanding of the nuclear equation of state by analyzing the allowed region in the mass-radius diagram of neutron stars for both a binary black hole or neutron star-black hole scenario. We find that the unlikely scenario in which the secondary object was a neutron star requires rather stiff equations of state with a maximum speed of sound c(x) >= root 0.6 times the speed of light, while the binary black hole scenario does not offer any new insight.

Ämnesord

NATURVETENSKAP  -- Fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences (hsv//eng)

Nyckelord

Compact objects

Neutron stars

Nuclear astrophysics

Nuclear physics

Neutron star cores

Stellar mergers

Gravitational waves

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