Effect of strong gravity on the optical appearance of rapidly fluctuating astronomical sources

1978 ◽  
Vol 226 ◽  
pp. 501 ◽  
Author(s):  
J. J. Matese ◽  
D. P. Whitmire
Keyword(s):  
Strong Gravity ◽  
Optical Appearance

Introduction

2018 ◽  
Author(s):  
Flavio Mercati
Keyword(s):  
Field Theory ◽  
General Relativity ◽  
Gravitational Collapse ◽  
Present State ◽  
Strong Gravity ◽  
Shape Dynamics

Shape Dynamics (SD) is a field theory that describes gravity in a different way than General Relativity (GR): it assumes a preferred notion of simultaneity, and the dynamical content of the theory consists of conformal 3- geometries. SD coincides with (GR) in most situations, in particular in the experimentally well-tested regimes, but it departs from it in some strong-gravity situations, for example at cosmological singularities or upon gravitational collapse. This chapter provides a quick introduction to the theory and a brief description of its present state.

OBSERVATIONAL CONSTRAINTS ON STRONG GRAVITY

2011 ◽  
Vol 20 (14) ◽  
pp. 2755-2760
Author(s):  
CHRIS DONE
Keyword(s):  
Black Hole ◽  
Event Horizon ◽  
Strong Field ◽  
Field Tests ◽  
High Energy ◽  
Observational Constraints ◽  
Tests Of General Relativity ◽  
Strong Gravity ◽  
Accretion Flows ◽  
Spacetime Curvature

Accretion onto a black hole transforms the darkest objects in the universe to the brightest. The high energy radiation emitted from the accretion flow before it disappears forever below the event horizon lights up the regions of strong spacetime curvature close to the black hole, enabling strong field tests of General Relativity. I review the observational constraints on strong gravity from such accretion flows, and show how the data strongly support the existence of such fundamental General Relativistic features of a last stable orbit and the event horizon. However, these successes also imply that gravity does not differ significantly from Einstein's predictions above the event horizon, so any new theory of quantum gravity will be very difficult to test.

Minimum time transfers of a low-thrust rocket in strong gravity fields

2003 ◽  
Vol 52 (8) ◽  
pp. 601-611 ◽  
Author(s):  
Boris M. Kiforenko ◽  
Zoya V. Pasechnik ◽  
Svitlana B. Kyrychenko ◽  
Igor Yu. Vasiliev
Keyword(s):  
Minimum Time ◽  
Low Thrust ◽  
Strong Gravity ◽  
Gravity Fields

Short-range potentials in the theory of strong gravity

1980 ◽  
Vol 56 (2) ◽  
pp. 302-312 ◽  
Author(s):  
J. Chela-Flores ◽  
P. Silva-Galiza
Keyword(s):  
Short Range ◽  
Strong Gravity

On the compatibility of strong gravity with the pion decay rate

1973 ◽  
Vol 15 (1) ◽  
pp. 92-106
Author(s):  
D. Capper ◽  
G. Leibbrandt
Keyword(s):  
Decay Rate ◽  
Pion Decay ◽  
Strong Gravity

scholarly journals Protecting ultra- and hyperhydrophilic implant surfaces in dry state from loss of wettability

2016 ◽  
Vol 2 (1) ◽  
pp. 557-560 ◽  
Author(s):  
Steffen Lüers ◽  
Markus Laub ◽  
Herbert P. Jennissen
Keyword(s):  
Dental Implants ◽  
Phosphate Buffer ◽  
Potassium Phosphate ◽  
Optimal System ◽  
Potassium Phosphate Buffer ◽  
Long Time ◽  
Optical Appearance

AbstractUltrahydrophilic titanium miniplates with sandblasted and acid etched (SLA) surfaces were protected from loss of hydrophilicity by an exsiccation layer of salt and stored in a dry state. Various salts in different concentrations were tested in respect to their conservation capacity and optical appearance. Potassium phosphate buffer in a specified composition appeared to be optimal. This optimal system was applied in a long time storage experiment showing no loss of hydrophilicity over years. It was also transferred with success to hyperhydrophilic dental implants.

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