Search for traversable wormholes in active galactic nuclei using x-ray data

Tripathi, Ashutosh; Zhou, Biao; Abdikamalov, Askar B.; Ayzenberg, Dimitry; Bambi, Cosimo

doi:10.1103/physrevd.101.064030

Cited by 17 publications

(15 citation statements)

References 97 publications

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“…Can observations be used to test if specific black holes are wormholes? We explore a proposal, first discussed by [6], to look for the effect of a perturbing object, orbiting on the other side of the wormhole, on the orbit of a star on our side (for other methods see e.g., [7][8][9][10][11][12][13][14][15][16][17]). Can we reasonably expect perturbers to orbit on the other side of a wormhole?…”

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confidence: 99%

Sensitive searches for wormholes

et al. 2021

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The realm of strong classical gravity and perhaps even quantum gravity are waiting to be explored. In this letter we consider the recently detected triple system composed of two stars and a nonaccreting black hole. Using published observations of this system we conduct the most sensitive test to date for whether the black hole is actually a wormhole by looking for orbital perturbations due to an object on the other side of the wormhole. The mass limit obtained on the perturber is ∼ 4 orders of magnitude better than for observations of S2 orbiting the supermassive black hole at Sgr A*. We also consider how observations of a pulsar could test for whether the black hole in a pulsar-black hole binary is a wormhole. A pulsar in a similar orbit to S2 would be ∼ 10 orders of magnitude more sensitive than observations of S2. For a nominal pulsar-black hole binary of stellar masses, with orbital size similar to that of the Hulse-Taylor binary pulsar, one year of observations could set a mass limit on a perturber that is ∼ 6 orders of magnitude better than observations of a pulsar around Sgr A*. A range of limits between the pulsar-Sgr A* and Hulse-Taylor cases could be obtained for a possible population of pulsar-black hole binaries that may exist near the galactic center.

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confidence: 99%

Sensitive searches for wormholes

et al. 2021

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“…Now, inserting Eq. ( 41) into the superluminal bound condition (39) we have (43) and from the conservation of the four-momentum p α p α = −m 2 , the superluminal bound condition reduces to…”

Section: B Superluminal Boundmentioning

confidence: 99%

“…Recently, a lot of theoretical researchers have studied different aspects of traversable wormholes within Einstein's gravity [23][24][25][26][27][28] as well as in alternative theories of gravity [29][30][31][32][33]. Furthermore, some authors have considered the effects that wormholes would produce from the observational point of view [34][35][36][37][38][39] with the aim of putting constraints on their possible detection. In [38], for example, it is studied the Kα iron line of several wormhole solutions based on the idea that supermassive black hole candidates at the center of galaxies might be wormholes formed in the early universe.…”

Section: Introductionmentioning

confidence: 99%

Spinning test particle motion around a traversable wormhole

Benavides-Gallego,

Han,

Malafarina

et al. 2021

Preprint

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The motion of spinning test particles around a traversable wormhole is investigated using the Mathisson-Papapetrous-Dixon equations, which couple the Riemann tensor with the antisymmetric tensor S αβ , related to the spin of the particle. Hence, we study the effective potential, circular orbits, and innermost stable circular orbit (ISCO) of spinning particles. We found that the spin affects significantly the location of the ISCO, in contrast with the motion of non-spinning particles, where the ISCO is the same in both the upper and lower universes. On the other hand, since the dynamical four-momentum and kinematical four-velocity of the spinning particle are not always parallel, we also consider a superluminal bound on the particle's motion. In the case of circular orbits at the ISCO, we found that the motion of particles with an adimensional spin parameter lower (greater) than s = −1.5 (1.5) is forbidden. The spin interaction becomes important for Kerr black hole orbiting super massive wormholes (SMWH).

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“…[23][24][25][26] study the effects of the gravitational pull a e-mail: b.azad@alumni.iut.ac.ir b e-mail: loran@iut.ac.ir c e-mail: amostafazadeh@ku.edu.tr (corresponding author) of the objects residing in the vicinity of one of the mouths of a wormhole on the trajectory of objects hovering around the other mouth. These studies together with the spectroscopic techniques [27] should, in principle, offer useful methods to decide whether a given celestial body is a traversable wormhole [28].…”

Section: Introductionmentioning

confidence: 99%

Transmission of low-energy scalar waves through a traversable wormhole

2020

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We study the scattering of low-energy massless and massive minimally coupled scalar fields by an asymptotically flat traversable wormhole. We provide a comprehensive treatment of this problem offering analytic expressions for the transmission and reflection amplitudes of the corresponding effective potential and the absorption cross section of the wormhole. Our results, which are based on a recently developed dynamical formulation of time-independent scattering theory, apply to a large class of wormhole spacetimes including a wormhole with a sharp transition, the Ellis wormhole, and a family of its generalizations.

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Search for traversable wormholes in active galactic nuclei using x-ray data

Cited by 17 publications

References 97 publications

Sensitive searches for wormholes

Sensitive searches for wormholes

Spinning test particle motion around a traversable wormhole

Transmission of low-energy scalar waves through a traversable wormhole

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