On general-relativistic hydrogen and hydrogenic ions

General relativity explains much more than the spacetime around static spherical masses.We briefly assess general relativity in the larger context of physical theories, then explore various general relativistic effects that have no Newtonian analog. First, source massmotion gives rise to gravitomagnetic effects on test particles.These effects also depend on the velocity of the test particle, which has substantial implications for orbits around black holes to be further explored in Chapter 20. Second, any changes in the sourcemass ripple outward as gravitational waves, and we tell the century‐long story from the prediction of gravitational waves to their first direct detection in 2015. Third, the deflection of light by galaxies and clusters of galaxies allows us to map the amount and distribution of mass in the universe in astonishing detail. Finally, general relativity enables modeling the universe as a whole, and we explore the resulting Big Bang cosmology.

On the Possibility of the Nonexplosive Core Contraction of Massive Stars. II. General Relativistic Analysis

The Astrophysical Journal ◽

10.1086/307511 ◽

1999 ◽

Vol 521 (1) ◽

pp. 376-381 ◽

Cited By ~ 9

Author(s):

Atsuyuki Hayashi ◽

Yoshiharu Eriguchi ◽

Masa‐aki Hashimoto

Keyword(s):

Massive Stars ◽

General Relativistic ◽

Relativistic Analysis

General Relativistic Decoherence with Applications to Dark Matter Detection

Physical Review Letters ◽

10.1103/physrevlett.127.031301 ◽

2021 ◽

Vol 127 (3) ◽

Author(s):

Itamar J. Allali ◽

Mark P. Hertzberg

Keyword(s):

Dark Matter ◽

General Relativistic ◽

Dark Matter Detection ◽

Matter Detection

Three-dimensional general relativistic Poynting-Robertson effect. IV. Slowly rotating and nonspherical quadrupolar massive source

Physical Review D ◽

10.1103/physrevd.103.084056 ◽

2021 ◽

Vol 103 (8) ◽

Author(s):

Vittorio De Falco ◽

Maciek Wielgus

Keyword(s):

Three Dimensional ◽

General Relativistic

Does general relativity highlight necessary connections in nature?

Synthese ◽

10.1007/s11229-020-03009-z ◽

2021 ◽

Author(s):

Antonio Vassallo

Keyword(s):

General Relativity ◽

Laws Of Nature ◽

Coupling Mechanism ◽

Einstein Field Equations ◽

Field Equations ◽

Bianchi Identities ◽

Physical Role ◽

General Relativistic ◽

Differential Relations ◽

Necessary Connections

AbstractThe dynamics of general relativity is encoded in a set of ten differential equations, the so-called Einstein field equations. It is usually believed that Einstein’s equations represent a physical law describing the coupling of spacetime with material fields. However, just six of these equations actually describe the coupling mechanism: the remaining four represent a set of differential relations known as Bianchi identities. The paper discusses the physical role that the Bianchi identities play in general relativity, and investigates whether these identities—qua part of a physical law—highlight some kind of a posteriori necessity in a Kripkean sense. The inquiry shows that general relativistic physics has an interesting bearing on the debate about the metaphysics of the laws of nature.

3D magnetized jet break-out from neutron-star binary merger ejecta: afterglow emission from the jet and the ejecta

Monthly Notices of the Royal Astronomical Society ◽

10.1093/mnras/stab115 ◽

2021 ◽

Vol 502 (2) ◽

pp. 1843-1855

Author(s):

Antonios Nathanail ◽

Ramandeep Gill ◽

Oliver Porth ◽

Christian M Fromm ◽

Luciano Rezzolla

Keyword(s):

Neutron Star ◽

Thermal Emission ◽

Opening Angle ◽

Hollow Core ◽

Binary Neutron Star ◽

Vlbi Observations ◽

Superluminal Motion ◽

General Relativistic ◽

Star Binary ◽

Magnetohydrodynamic Simulations

ABSTRACT We perform 3D general-relativistic magnetohydrodynamic simulations to model the jet break-out from the ejecta expected to be produced in a binary neutron-star merger. The structure of the relativistic outflow from the 3D simulation confirms our previous results from 2D simulations, namely, that a relativistic magnetized outflow breaking out from the merger ejecta exhibits a hollow core of θcore ≈ 4°, an opening angle of θjet ≳ 10°, and is accompanied by a wind of ejected matter that will contribute to the kilonova emission. We also compute the non-thermal afterglow emission of the relativistic outflow and fit it to the panchromatic afterglow from GRB170817A, together with the superluminal motion reported from VLBI observations. In this way, we deduce an observer angle of $\theta _{\rm obs}= 35.7^{\circ \, \, +1.8}_{\phantom{\circ \, \, }-2.2}$. We further compute the afterglow emission from the ejected matter and constrain the parameter space for a scenario in which the matter responsible for the thermal kilonova emission will also lead to a non-thermal emission yet to be observed.

Hydrogenic ions in an attosecond laser

Journal of Physics Conference Series ◽

10.1088/1742-6596/194/3/032010 ◽

2009 ◽

Vol 194 (3) ◽

pp. 032010 ◽

Cited By ~ 1

Author(s):

N Vence ◽

P S Krstic ◽

R J Harrison

Keyword(s):

Hydrogenic Ions

Electron Elastic Scattering Resonances in the Collision of Fast Hydrogenic Ions with Molecular Hydrogen

Physica Scripta ◽

10.1238/physica.topical.092a00272 ◽

2001 ◽

Vol T92 (1) ◽

pp. 272-274 ◽

Cited By ~ 3

Author(s):

G. Toth ◽

P. Zavodszky ◽

C. P. Bhalla ◽

P. Richard ◽

S. Grabbe ◽

...

Keyword(s):

Elastic Scattering ◽

Molecular Hydrogen ◽

Hydrogenic Ions ◽

Scattering Resonances

Exact general relativistic thick disks

Physical Review D ◽

10.1103/physrevd.69.044013 ◽

2004 ◽

Vol 69 (4) ◽

Cited By ~ 21

Author(s):

Guillermo A. González ◽

Patricio S. Letelier

Keyword(s):

General Relativistic ◽

Thick Disks