What question did this study set out to answer?

The aim is to describe the phase diagram of compact objects in the CCEGA framework and identify new regimes.

April 3, 2026Open Access

GW190814's Mystery Object Explained: A New Compact Object Regime in the CCEGA Framework

Key Points

The aim is to describe the phase diagram of compact objects in the CCEGA framework and identify new regimes.
Developed a complete phase diagram for compact objects in CCEGA.
Identified critical masses, including M_max and M_crit.
Analyzed properties of ultracompact horizonless objects not found in general relativity.
Established two critical masses: M_max at 2.330 M☉ and M_crit at 9.20 M☉.
Discovered an intermediate regime for objects between 2.33 M☉ and 9.20 M☉.
Positioned GW190814's secondary object (2.59 M☉) within this newly identified regime.

Abstract

Description Complete phase diagram of compact objects in CCEGA with Gₑff (ρ) = GN·exp (−ρ/ρc). Three regimes emerge from two critical masses: Mₘax = 2. 330 M☉ (neutron star limit, P34) and Mcrit = 9. 20 M☉ (horizon formation threshold, P35). Novel intermediate regime 2. 33–9. 20 M☉: ultracompact horizonless CCEGA objects absent in GR. GW190814 secondary (2. 59 M☉) falls in this regime. Phase boundaries depend on ρc — independent observational constraint. CCEGA Program Paper 36.

GW190814's Mystery Object Explained: A New Compact Object Regime in the CCEGA Framework

Key Points

Abstract

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