Impact of the wave-like nature of Proca stars on their gravitational-wave emission

Sanchis-Gual, N.; Bustillo, J. Calderón; Herdeiro, Carlos; Radu, Eugen; Font, José A.; Leong, Samson H. W.; Torres-Forné, A.

doi:10.48550/arxiv.2208.11717

Cited by 2 publications

(5 citation statements)

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“…• There have been some observational aspects of Proca models in the context of gravitational waves [23] and black hole shadows [24]. We believe a further systematic analysis of the non-relativistic Proca theory can shed some important light in this direction.…”

Section: Future Prospectsmentioning

confidence: 93%

“…Apart from these there is a recent resurgence of the study of Proca model from different aspects. For example there are studies in the context of gravitational waves [23], gravitational lensing and black hole (BH) shadows [24], alternative theories of gravity [25]. There has been a prescription to generalise the Proca action which gives rise to generalised Proca model [26].…”

Section: Introductionmentioning

confidence: 99%

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A new formulation of Galilean relativistic Proca theory

Banerjee¹,

Bhattacharya²

2023

Preprint

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In this paper, we discuss Galilean relativistic Proca theory in detail. We first provide a set of mapping relations, derived systematically, that connect the covariant and contravariant vectors in the Lorentz relativistic and Galilean relativistic formulations. Exploiting this map, we construct the two limits of Galilean relativistic Proca theory from usual Proca theory in the potential formalism for both contravariant and covariant vectors which are now distinct entities. An action formalism is thereby derived from which the field equations are obtained and their internal consistency is shown. Next we construct Noether currents and show their on-shell conservation. We introduce analogues of Maxwell's electric and magnetic fields and recast the entire analysis in terms of these fields. Explicit invariance under Galilean transformations is shown for both electric/magnetic limits. We then move to discuss Stuckelberg embedded Proca model in the Galilean framework.

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Section: Future Prospectsmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

A new formulation of Galilean relativistic Proca theory

Banerjee¹,

Bhattacharya²

2023

Preprint

View full text Add to dashboard Cite

show abstract

“…[8,33,38,42,81] (see Ref. [47] for a study in the PS case). Here, we consider the impact of the scalar interactions on the inspiral of a binary BS and connect our observations directly to the physical intuition provided in Sec.…”

Section: Gravitational Wave Imprintsmentioning

confidence: 99%

“…In fact, in Refs. [47,81], it was noted that in the case of head-on collisions, the GW emission is predictably dependent on the phase-offset at early times and the point of contact. Our results, however, suggest that in the case of a BS inspiral, the nonlinear interactions prior to merger, which accumulate secularly, render a reliable prediction of the phase-offset at the point of contact challenging.…”

Section: Gravitational Wave Imprintsmentioning

confidence: 99%

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Binary boson stars: Merger dynamics and formation of rotating remnant stars

Siemonsen¹,

East²

2023

Preprint

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Scalar boson stars have attracted attention as simple models for exploring the nonlinear dynamics of a large class of ultra compact and black hole mimicking objects. Here, we study the impact of interactions in the scalar matter making up these stars. In particular, we show the pivotal role the scalar phase and vortex structure play during the late inspiral, merger, and post-merger oscillations of a binary boson star, as well as their impact on the properties of the merger remnant. To that end, we construct constraint satisfying binary boson star initial data and numerically evolve the nonlinear set of Einstein-Klein-Gordon equations. We demonstrate that the scalar interactions can significantly affect the inspiral gravitational wave amplitude and phase, and the length of a potential hypermassive phase shortly after merger. If a black hole is formed after merger, we find its spin angular momentum to be consistent with similar binary black hole and binary neutron star merger remnants. Furthermore, we formulate a mapping that approximately predicts the remnant properties of any given binary boson star merger. Guided by this mapping, we use numerical evolutions to explicitly demonstrate, for the first time, that rotating boson stars can form as remnants from the merger of two non-spinning boson stars. We characterize this new formation mechanism and discuss its robustness. Finally, we comment on the implications for rotating Proca stars.

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Impact of the wave-like nature of Proca stars on their gravitational-wave emission

Cited by 2 publications

References 0 publications

A new formulation of Galilean relativistic Proca theory

A new formulation of Galilean relativistic Proca theory

Binary boson stars: Merger dynamics and formation of rotating remnant stars

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