Detecting dark matter cores in galaxy clusters with strong lensing

Andrade, Kevin E.; Minor, Quinn E.; Nierenberg, Anna; Kaplinghat, Manoj

doi:10.1093/mnras/stz1360

Cited by 36 publications

(22 citation statements)

References 61 publications

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“…Studies of the predicted effects of SIDM in comparison with observations place some constraints on the ratio of the DM self-interaction cross section to the dark matter mass. These observational probes include cluster lensing [24,27,28], mergers [29,30], and X-ray ellipticities [31]. While early constraints on SIDM in clusters suggested low cross section values of σ/m 0.02 cm 2 /g [27], subsequent higher resolution simulations indicated that these limits were overly optimistic and that cross sections of σ/m 1 cm 2 /g are consistent with simulations across a variety of mass scales [24,32].…”

Section: Introductionmentioning

confidence: 96%

X-Ray Shapes of Elliptical Galaxies and Implications for Self-Interacting Dark Matter

McDaniel,

Jeltema,

Profumo

2021

Preprint

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Several proposed models for dark matter posit the existence of self-interaction processes that can impact the shape of dark matter halos, making them more spherical than the ellipsoidal halos of collisionless dark matter. One method of probing the halo shapes, and thus the strength of the dark matter self-interaction, is by measuring the shape of the X-ray gas that traces the gravitational potential in relaxed elliptical galaxies. In this work we identify a sample of 11 relaxed, isolated elliptical galaxies and measure the ellipticity of the gravitating matter using X-ray images from the XMM-Newton and Chandra telescopes. We explore a variety of different mass configurations and find that the dark matter halos of these galaxies have ellipticities around ≈ 0.2 − 0.5. While we find non-negligible scatter in the ellipticity distribution, our results are consistent with some degree of self-interaction at the scale of σ/m ∼ 1 cm 2 /g, yet they also remain compatible with a cold dark matter scenario. We additionally demonstrate how our results can be used to directly constrain specific dark matter models and discuss implications for current and future simulations of self-interacting dark matter models.

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Section: Introductionmentioning

confidence: 96%

X-Ray Shapes of Elliptical Galaxies and Implications for Self-Interacting Dark Matter

McDaniel,

Jeltema,

Profumo

2021

Preprint

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“…The gravitational lensing occurs when a huge amount of matter creates a gravitational field distorting the light from a source. As a significant phenomenon, the gravitational lensing can reflect the distribution of matter, such as galaxy clusters [22][23][24][25], dark matter [26][27][28], dark energy [29][30][31], black holes [32][33][34][35][36][37][38], and wormholes [39][40][41][42]. Gibbons and Werner applied [43] the Gauss-Bonnet theorem to develop an alternative approach with a global feature to gravitational lensing theories.…”

Section: Introductionmentioning

confidence: 99%

Bounce corrections to gravitational lensing, quasinormal spectral stability and gray-body factors of Reissner-Nordström black holes

Guo¹,

Miao²

2022

Preprint

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Gravitational lensing in the weak field limit, quasinormal spectra, and gray-body factors are investigated in the Reissner-Nordström spacetime corrected by bounce parameters. Using the Gauss-Bonnet theorem, we analyze the effects of bounce corrections to the weak gravitational deflection angle and find that the divergence of the deflection angle can be suppressed by a bounce correction in the Reissner-Nordström spacetime. We also notice that the bounce correction plays the same role as the Morse potential in the deflection angle. Moreover, we derive the perturbation equations with the spin-dependent Regge-Wheeler potential and discuss the quasinormal spectral stability. We observe that the quasinormal spectra decrease for both the massless scalar and electromagnetic field perturbations. We further study the transmission probability of particles scattered by the Regge-Wheeler potential and reveal that the bounce correction introduced into the Reissner-Nordström spacetime increases the gray-body factors of perturbation fields.

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“…On the other hand, it is well known that light rays will be bent when traveling through a massive object, known as the gravitational lensing effect, which is one of the key predictions of GR. At present, the gravitational lensing is one of the most powerful tools in astronomy and cosmology, such as, measuring the mass of galaxies and clusters [27][28][29], detecting dark energy and dark matter [30][31][32][33][34][35][36]. Since the first measurement of the gravitational bending of light by the sun, the gravitational lensing effects have been extensively investigated for black holes, wormholes, cosmic strings and other objects by the lens equation [37][38][39][40][41][42][43][44][45][46][47][48][49][50][51].…”

Section: Introductionmentioning

confidence: 99%

Weak deflection angle by electrically and magnetically charged black holes from nonlinear electrodynamics

Fu,

Zhao,

Liu

2021

Preprint

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Nonlinear electrodynamic (NLED) theories are well-motivated for their extensions to classical electrodynamics in the strong field regime, and have been extensively investigated in seeking for regular black hole solutions. In this paper, we focus on two spherically symmetric and static black hole solutions based on two types of NLED models: the Euler-Heisenberg NLED model and the Bronnikov NLED model, and calculate the weak deflection angle of light by these two black holes with the help of the Gauss-Bonnet theorem. We investigate the effects of the one-loop corrections to quantum electrodynamics on the deflection angle and analyse the behavior of the deflection angle by a regular magnetically charged black hole. It is found that the weak deflection angle of the electrically charged Einstein-Euler-Heisenberg black hole increases with the one-loop corrections and the regular magnetically charged black hole based on the Bronnikov NLED model has a smaller deflection angle than the singular one. Besides, we also calculate the deflection angle of light by the geodesic method for verification. In addition, we discuss the effects of a cold non-magnetized plasma on the deflection angle and find that the deflection angle increases with the plasma parameter.

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Detecting dark matter cores in galaxy clusters with strong lensing

Cited by 36 publications

References 61 publications

X-Ray Shapes of Elliptical Galaxies and Implications for Self-Interacting Dark Matter

X-Ray Shapes of Elliptical Galaxies and Implications for Self-Interacting Dark Matter

Bounce corrections to gravitational lensing, quasinormal spectral stability and gray-body factors of Reissner-Nordström black holes

Weak deflection angle by electrically and magnetically charged black holes from nonlinear electrodynamics

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