Improved Solar System bounds on the cosmologically viable f ( G ) $f(\mathcal{G})$ gravity

Deng, Xue-Mei; Xie, Yi

doi:10.1007/s10509-017-3035-x

Cited by 5 publications

(4 citation statements)

References 205 publications

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“…In ref. [8], improved Solar System bounds are obtained for this theory using cosmological models. These improved constraints are obtained on the behalf of supplementary advances of the perihelia given by INPOP10a and INPOP15a (France) and EPM2011 (Russia) ephemerides, where Lense-Thirring effect has been considered due to the Sun's angular momentum and the uncertainty of the Sun's quadrupole moment.…”

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confidence: 99%

Solar system tests in modified teleparallel gravity

Bahamonde

Said

Zubair

2020

J. Cosmol. Astropart. Phys.

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In this paper, we study different Solar System tests in a modified Teleparallel gravity theory based on an arbitrary function f (T, B) which depends on the scalar torsion T and the boundary term B. To do this, we first find new perturbed spherically symmetric solutions around Schwarzschild for different power-law forms of the arbitrary Lagrangian. Then, for each model we calculated the photon sphere, perihelion shift, deflection of light, Cassini experiment, Shapiro delay and the gravitational redshift. Finally, we confront these computations with different known experiments from these Solar System tests to put different bounds on the mentioned models. We then conclude that f (T, B) is compatible with these Solar System experiments with a wide range of parameters which are relevant for cosmology.

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confidence: 99%

Solar system tests in modified teleparallel gravity

Bahamonde

Said

Zubair

2020

J. Cosmol. Astropart. Phys.

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“…Vegetables have high antioxidant and phenolic components. 7,8 Phytochemicals possess various chemical entities, including polyphenols, steroidal saponins, flavonoids, organosulphur compounds, and vitamins. 9 Natural polyphenols are plentiful antioxidants in human food diets, and radical scavenging actions are associated with substituting hydroxyl groups of phenolics.…”

Section: Introductionmentioning

confidence: 99%

Therapeutic Targeting of Regulated Signaling Pathways of Non-Small Cell Lung Carcinoma

et al. 2023

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Non-small cell lung carcinoma (NSCLC) is the most common cancer globally. Phytochemicals and small molecule inhibitors significantly prevent varying types of cancers, including NSCLC. These therapeutic molecules serve as important sources for new drugs that interfere with cellular proliferation, apoptosis, metastasis, and angiogenesis by regulating signaling pathways. These molecules affect several cellular signaling cascades, including p53, NF-κB, STAT3, RAS, MAPK/ERK, Wnt, and AKT/PI3K, and are thus implicated in the therapeutic management of cancers. This review aims to describe the bioactive compounds and small-molecule inhibitors, their anticancer action, and targeting cellular signaling cascades in NSCLC. We highlighted the therapeutic potential of Epigallocatechin gallate (EGCG), Perifosine, ABT-737, Thymoquinine, Quercetin, Venetoclax, Gefitinib, and Genistein. These compounds are implicated in the therapeutic management of NSCLC. This review further offers deeper mechanistic insights into different signaling pathways that could be targeted for NSCLC therapy by phytochemicals and small-molecule inhibitors.

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“…Some examples are scalar-tensor theories including the Brans-Dicke theories [7][8][9][10] and general scalar-tensor theories [11][12][13][14][15][16], Einstein-aether theory [17], Bimetric theories [18][19][20], tensor-vector-scalar theories [21][22][23][24], scalar-tensor-vector theories [25,26], and Einstein-Cartan-Sciama-Kibble theories [27,28]. There are models of higher derivative and non-local theories of gravity, such as f(R) theories [29][30][31][32][33], f(G) theories [34][35][36], Hořava-Lifschitz gravity [37][38][39], as well as Galileons [40,41]. The other forms of modified theories of gravity with higher dimensions include Kaluza-Klein theories [42][43][44], the Brane cosmology or higher co-dimension brane-worlds [45][46][47][48] and Einstein-Gauss-Bonnet gravity [49].…”

Section: Introductionmentioning

confidence: 99%

Chaos in a Magnetized Brane-World Spacetime Using Explicit Symplectic Integrators

Huang

2022

Universe

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A brane-world metric with an external magnetic field is a modified theory of gravity. It is suitable for the description of compact sources on the brane such as stars and black holes. We design a class of explicit symplectic integrators for this spacetime and use one of the integrators to investigate how variations of the parameters affect the motion of test particles. When the magnetic field does not vanish, the integrability of the system is destroyed. Thus, the onset of chaos can be allowed under some circumstances. Chaos easily occurs when the electromagnetic parameter becomes large enough. Dark matter acts as a gravitational force, so that chaotic motion can become more obvious as dark matter increases. The gravity of the black hole is weakened with an increasing positive cosmological parameter; therefore, the extent of chaos can be also strengthened. The proposed symplectic integrator is applied to a ray-tracing method and the study of such chaotic dynamics will be a possible reference for future studies of brane-world black hole shadows with chaotic patterns of self-similar fractal structures based on the Event Horizon Telescope data for M87* and Sagittarius A*.

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Improved Solar System bounds on the cosmologically viable f ( G ) $f(\mathcal{G})$ gravity

Cited by 5 publications

References 205 publications

Solar system tests in modified teleparallel gravity

Solar system tests in modified teleparallel gravity

Therapeutic Targeting of Regulated Signaling Pathways of Non-Small Cell Lung Carcinoma

Chaos in a Magnetized Brane-World Spacetime Using Explicit Symplectic Integrators

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