Configurational entropy in $$f\,(R,T\,)$$ f ( R , T ) brane models

Correa, R. A. C.; Moraes, P. H. R. S.

doi:10.1140/epjc/s10052-016-3952-9

Cited by 88 publications

(83 citation statements)

References 76 publications

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“…The prodigious reserves of gas surrounding galaxies in the circumgalactic medium (CGM) play an important role in galaxy evolution (see review by Tumlinson et al 2017). This gas is primarily derived from the intergalactic medium (IGM, e.g., Putman et al 2012;Cooper et al 2015;Glidden et al 2016), from cannibalizing satellite galaxies (e.g., Cole et al 2000;Cox et al 2008;Qu et al 2011;Lambas et al 2012a,b;Kaviraj 2014;Ownsworth et al 2014;Gómez-Guijarro et al 2018), and from galactic feedback (e.g., Strickland & Heckman 2009;Schaye et al 2015;van de Voort 2017;Butler et al 2017;Correa et al 2018). The general accepted picture of how a typical galaxy evolves includes the accretion of relatively metal-poor gas from the CGM onto the galactic disk (see review by Kacprzak 2017), which is used to fuel star formation.…”

Section: Introductionmentioning

confidence: 99%

Kinematics of the O vi Circumgalactic Medium: Halo Mass Dependence and Outflow Signatures

Nielsen

Kacprzak

et al. 2019

ApJ

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We probe the high-ionization circumgalactic medium by examining absorber kinematics, absorber-galaxy kinematics, and average absorption profiles of 31 O VI absorbers from the "Multiphase Galaxy Halos" Survey as a function of halo mass, redshift, inclination, and azimuthal angle. The galaxies are isolated at 0.12 < z gal < 0.66 and are probed by a background quasar within D ≈ 200 kpc. Each absorber-galaxy pair has Hubble Space Telescope images and COS quasar spectra, and most galaxy redshifts have been accurately measured from Keck/ESI spectra. Using the pixel-velocity two-point correlation function (TPCF) method, we find that O VI absorber kinematics have a strong halo mass dependence. Absorbers hosted by ∼ L * galaxies have the largest velocity dispersions, which we interpret to be that the halo virial temperature closely matches the temperature at which the collisionally ionized O VI fraction peaks. Lower mass galaxies and group environments have smaller velocity dispersions. Total column densities follow the same behavior, consistent with theoretical findings. After normalizing out the observed mass dependence, we studied absorber-galaxy kinematics with a modified TPCF and found non-virialized motions due to outflowing gas. Edge-on minor axis gas has large optical depths concentrated near the galaxy systemic velocity as expected for bipolar outflows, while faceon minor axis gas has a smoothly decreasing optical depth distribution out to large normalized absorbergalaxy velocities, suggestive of decelerating outflowing gas. Accreting gas signatures are not observed due to "kinematic blurring" in which multiple line-of-sight structures are observed. These results indicate that galaxy mass dominates O VI properties over baryon cycle processes.

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Section: Introductionmentioning

confidence: 99%

Kinematics of the O vi Circumgalactic Medium: Halo Mass Dependence and Outflow Signatures

Nielsen

Kacprzak

et al. 2019

ApJ

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“…This is quite usual when one wishes to particularly investigate the role of extra material rather than geometrical terms in gravity. Anyhow, f (R, T ) models with correction terms on both sides of Einstein's field equations can be seen in [56,70,75,78] and also [91,92,93]. Furthermore, for an f (R, T ) model containing a strong coupling between geometry and matter, such as f (R, T ) = R + αRT , with constant α, check [94].…”

Section: The F (R T ) Gravitymentioning

confidence: 99%

“…To get in touch with some extra-dimensional f (R, T ) models, check[76,77,78,79,80,81,82,83,84,85,86,87,88,89,90].…”

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confidence: 99%

The trace of the trace of the energy–momentum tensor-dependent Einstein’s field equations

Moraes

2019

Eur. Phys. J. C

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The f (R, T ) gravity field equations depend generically on both the Ricci scalar R and trace of the energy-momentum tensor T . Within the assumption of perfect fluids, the theory carries an arbitrariness regarding the choice of the matter lagrangian density L, not uniquely defined. Such an arbitrariness can be evaded by working with the trace of the theory field equations. From such an equation, one can obtain a form for L, which does not carry the arbitrariness. The obtained form for L shows that the f (R, T ) gravity is unimodular. A new version of the theory is, therefore, presented and forthcoming applications are expected.

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“…By the introduction of gravitational action of the f (R, T ) gravity in Ricci scalar R and the trace of energy momentum tensor T , T. Harko and fellow researchers [39] streamlined the f (R) theories [40][41][42][43][44][45] by replacing the function f (R) with a random function f (R, T ). This f (R, T ) theory tested in Astrophysics of compact objects [46][47][48][49], Thermodynamics [50,51] and cosmology [52][53][54][55][56][57][58][59][60][61][62][63].…”

Section: Introductionmentioning

confidence: 99%

Traversable wormholes in $f(R,T)$ gravity

Mishra

Sharma

Dubey

et al. 2020

Astrophys Space Sci

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In the present article, models of traversable wormholes within the f (R, T ) modified gravity theory are investigated. We have presented some wormhole models, developed from various hypothesis for the substance of their matter, i.e. various relationships with their components of pressure (lateral and radial). The solutions found for the shape functions of the wormholes produced complies with the required metric conditions. The suitability of solution is examined by exploring null, strong and dominant energy conditions. It is surmised that the normal matter in the throat may pursue the energy conditions yet the gravitational field exuding from the adjusted gravity hypothesis support the appearance of the non-standard geometries of wormholes.

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Configurational entropy in $$f\,(R,T\,)$$ f ( R , T ) brane models

Cited by 88 publications

References 76 publications

Kinematics of the O vi Circumgalactic Medium: Halo Mass Dependence and Outflow Signatures

Kinematics of the O vi Circumgalactic Medium: Halo Mass Dependence and Outflow Signatures

The trace of the trace of the energy–momentum tensor-dependent Einstein’s field equations

Traversable wormholes in $f(R,T)$ gravity

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