44 citations · 153 across the 16 of their papers we have counts for
16 papers
Primordial Black Holes, Charge, and Dark Matter: Rethinking Evaporation Limits
Sebastian Schuster, Jessica Santiago, Justin Feng +1
Limits on the dark matter fraction of small mass primordial black holes from Hawking radiation are predominantly derived from the assumption of a Schwarzschild black hole evaporati…
Immortality through the dark forces: Dark-charge primordial black holes as dark matter candidates
Jessica Santiago, Justin Feng, Sebastian Schuster +1
The fact that no Hawking radiation from the final stages of evaporating primordial black holes (PBHs) has yet been observed places stringent bounds on their allowed contribution to…
Dynamical analysis of the redshift drift in FLRW universes
Francisco S. N. Lobo, José Pedro Mimoso, Jessica Santiago +1
Redshift drift is the phenomenon whereby the observed redshift between an emitter and observer comoving with the Hubble flow in an expanding FLRW universe will slowly evolve -- on…
ADM mass in warp drive spacetimes
Sebastian Schuster, Jessica Santiago, Matt Visser
What happens when a warp bubble has mass? This seemingly innocent question forces one to carefully formalize exactly what one means by a warp bubble, exactly what one means by havi…
Timelike vs null deceleration parameter in tilted Friedmann universes
Jessica Santiago, Christos G. Tsagas
Information exchanged between observers in the universe typically travels along the null rays of the associated light signals. One may therefore decompose the luminosity distance o…
Modeling VI and VDRL feedback functions: searching normative rules through computational simulation
Paulo Sergio Panse Silveira, Jose de Oliveira Siqueira, Joao Lucas Bernardy +4
In this paper, we present a R script named Beak, built to simulate rates of behavior interacting with schedules of reinforcement. Using Beak, we've simulated data that allows an as…
Tractor beams, pressor beams, and stressor beams within the context of general relativity
Matt Visser, Jessica Santiago, Sebastian Schuster
Both traversable wormholes and warp drives, concepts originally developed within the context of science fiction, have now (for some 30 odd years) been studied, debated, and careful…
Tractor beams, pressor beams, and stressor beams in general relativity
Jessica Santiago, Sebastian Schuster, Matt Visser
The metrics of general relativity generally fall into two categories: Those which are solutions of the Einstein equations for a given source energy-momentum tensor, and the "revers…
Generic warp drives violate the null energy condition
Jessica Santiago, Sebastian Schuster, Matt Visser
Three very recent articles have claimed that it is possible to, at least in theory, either set up positive energy warp drives satisfying the weak energy condition (WEC), or at the…
On the Connections between Thermodynamics and General Relativity
Jessica Santiago
In this thesis, the connections between thermodynamics and general relativity are explored. We review the concept of gravitationally induced temperature gradients in equilibrium st…
Evading the Trans-Planckian problem with Vaidya spacetimes
Ivan Booth, Bradley Creelman, Jessica Santiago +1
Hawking radiation, when treated in the ray optics limit, exhibits the unfortunate trans-Planckian problem --- a Hawking photon near spatial infinity, if back-tracked to the immedia…
Tolman-like temperature gradients in stationary spacetimes
Jessica Santiago, Matt Visser
It is (or should be) well known that specification of a heat bath requires both a temperature and a 4-velocity, the rest frame of the heat bath. In static spacetimes there is a ver…
Gravity's universality: The physics underlying Tolman temperature gradients
Jessica Santiago, Matt Visser
We provide a simple and clear verification of the physical need for temperature gradients in equilibrium states when gravitational fields are present. Our argument will be built in…
Tolman temperature gradients in a gravitational field
Jessica Santiago, Matt Visser
Tolman's relation for the temperature gradient in an equilibrium self-gravitating general relativistic fluid is broadly accepted within the general relativity community. However, t…
"Twisted" black holes are unphysical
Finnian Gray, Jessica Santiago, Sebastian Schuster +1
So-called "twisted" black holes have recently been proposed by Zhang (1609.09721 [gr-qc]), and further considered by Chen and Jing (1610.00886 [gr-qc]), and more recently by Ong (1…
Instability of nonminimally coupled scalar fields in the spacetime of thin charged shells
Jessica Santiago, Andre G. S. Landulfo, William C. C. Lima +3
We investigate the stability of a free scalar field nonminimally coupled to gravity under linear perturbations in the spacetime of a charged spherical shell. Our analysis is perfor…