Gravitational Kaluza-Klein modes in the string-cigar braneworld

Veras, D. F. S.; Silva, J. E. G.; Cruz, W. T.; Almeida, C. A. S.

doi:10.1103/physrevd.91.065031

Cited by 15 publications

(18 citation statements)

References 67 publications

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“…It is obvious from equation (24) that for a phaseindependent perturbing force and under the adiabatic approximation, there is no secular evolution of the osculating semi-major axis due to phase-independent anisotropic wind mass-loss [see also Veras et al (2013)]. On the other hand, according to equation (25) a secular change will be induced to the eccentricity if F aniso,q = 0.…”

Section: Anisotropic Wind Mass-lossmentioning

confidence: 99%

Orbital Evolution of Mass-Transferring Eccentric Binary Systems. Ii. Secular Evolution

Dosopoulou

Kalogera

2016

ApJ

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Finite eccentricities in mass-transferring eccentric binary systems can be explained by taking into account mass-loss and mass-transfer processes that often occur in these systems. These processes can be treated as perturbations to the general two-body problem. The time-evolution equations for the semi-major axis and the eccentricity derived from perturbative methods are in general phasedependent. The osculating semi-major axis and eccentricity change over the orbital timescale and they are not easy to implement in binary evolution codes like MESA. However, the secular orbital element evolution equations can be simplified averaging over the rapidly varying true anomalies. In this paper, we derive the secular time-evolution equations for the semi-major axis and the eccentricity for various mass-loss/transfer processes using either the adiabatic approximation or the assumption of deltafunction mass-loss/transfer at periastron. We begin with the cases of isotropic and anisotropic wind mass-loss. We continue with conservative and non-conservative non-isotropic mass ejection/accretion (including RLOF) for both point-masses and extended bodies. We conclude with the case of phasedependent mass accretion. Comparison of the derived equations with similar work in the literature is included and explanation of the existing discrepancies is provided.

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Section: Anisotropic Wind Mass-lossmentioning

confidence: 99%

Orbital Evolution of Mass-Transferring Eccentric Binary Systems. Ii. Secular Evolution

Dosopoulou

Kalogera

2016

ApJ

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“…What is the post-fission fate of the particles? Scheeres (2018) and Veras & Scheeres (2020) demonstrated that multiple generations of radiation-induced rotational breakup of a nearly-spherical rubble pile can occur until the rubble pile has been broken down into its monolithic components. In contrast here, for a triaxial rubble pile aroundZTF J0139+5245, the situation is more complex: rotational breakups can occur repeatedly until the child particles become spherical (when β = 1 in equation 4) 2 .…”

Section: Discussionmentioning

confidence: 99%

“…As a star leaves the main sequence, its luminosity increases sufficiently to spin up minor planets to the point of rotational fission through the YORP effect (Veras et al 2014a;Veras & Scheeres 2020). Although the extent and location of the break-up depends on the physical parameters of the asteroids in question, Veras et al (2014a) claimed that asteroids under about 10 km in radius within about 7 au of their parent star are easily destroyed.…”

Section: Introductionmentioning

confidence: 99%

Constraining the origin of the planetary debris surrounding ZTF J0139+5245 through rotational fission of a triaxial asteroid

Veras

McDonald

Макаров

2020

Monthly Notices of the Royal Astronomical Society

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White dwarfs containing orbiting planetesimals or their debris represent crucial benchmarks by which theoretical investigations of post-main-sequence planetary systems may be calibrated. The photometric transit signatures of likely planetary debris in the ZTF J0139+5245 white dwarf system has an orbital period of about 110 days. An asteroid which breaks up to produce this debris may spin itself to destruction through repeated close encounters with the star without entering its Roche radius and without influence from the white dwarf's luminosity. Here, we place coupled constraints on the orbital pericentre (q) and the ratio (β) of the middle to longest semiaxes of a triaxial asteroid which disrupts outside of this white dwarf's Roche radius (r Roche ) soon after attaining its 110-day orbit. We find that disruption within tens of years is likely when β 0.6 and q ≈ 1.0 − 2.0r Roche , and when β 0.2 out to q ≈ 2.5r Roche . Analysing the longer-timescale disruption of triaxial asteroids around ZTF J0139+5245 is desirable but may require either an analytical approach relying on ergodic theory or novel numerical techniques.

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“…( 40) and obtain the massive modes. Adopting the usual boundary condition ψ (0) = ψ (∞) = 0 [11,46], the first massive modes are shown in Fig. 5.…”

Section: A Kaluza-klein Modesmentioning

confidence: 99%

Teleparallel gravity: Effects of torsion in 6D braneworlds

Moreira,

Silva,

Almeida

2021

Preprint

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Braneworld models are interesting theoretical and phenomenological frameworks to search for new physics beyond the standard model of particles and cosmology. In this work, we discuss braneworld models whose gravitational dynamics is governed by teleparallel f (T ) gravities. Here, we emphasize a codimension two axisymmetric model, also known as a string-like brane. Likewise, in the 5D domain-walls models, the f (T ) gravitational modification leads to a phase transition on the perfect fluid source providing a brane-splitting mechanism. Furthermore, the torsion changes the gravitational perturbations. The torsion produces new potential wells inside the brane core leading to a massless mode more localized around the ring structures. In addition, the torsion keeps a gapless non-localizable and a stable tower of massive modes in the bulk.

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Gravitational Kaluza-Klein modes in the string-cigar braneworld

Cited by 15 publications

References 67 publications

Orbital Evolution of Mass-Transferring Eccentric Binary Systems. Ii. Secular Evolution

Orbital Evolution of Mass-Transferring Eccentric Binary Systems. Ii. Secular Evolution

Constraining the origin of the planetary debris surrounding ZTF J0139+5245 through rotational fission of a triaxial asteroid

Teleparallel gravity: Effects of torsion in 6D braneworlds

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