## Citation

Dykla, John Joseph
(1973)
*Conserved quantities and the formation of black holes in the Brans-Dicke theory of gravitation.*
Dissertation (Ph.D.), California Institute of Technology.
doi:10.7907/h455-hg42.
https://resolver.caltech.edu/CaltechTHESIS:06022015-082916942

## Abstract

In Part I, we construct a symmetric stress-energy-momentum
pseudo-tensor for the gravitational fields of Brans-Dicke theory, and use this to establish rigorously conserved integral expressions for energy-momentum P^{i} and angular momentum J^{ik}. Application of the two-dimensional surface integrals to the exact static spherical vacuum solution of Brans leads to an identification of our conserved mass with the active gravitational mass. Application to the distant fields of an arbitrary stationary source reveals that P^{i} and J^{ik} have the same physical interpretation as in general relativity. For gravitational waves whose wavelength is small on the scale of the background radius of curvature, averaging over several wavelengths in the Brill-Hartle-Isaacson manner produces a stress-energy-momentum tensor for gravitational radiation which may be used to calculate the changes in P^{i} and J^{ik} of their source.

In Part II, we develop strong evidence in favor of a conjecture by Penrose--that, in the Brans-Dicke theory, relativistic gravitational collapse in three dimensions produce black holes identical to those of general relativity. After pointing out that any black hole solution of general relativity also satisfies Brans-Dicke theory, we establish the Schwarzschild and Kerr geometries as the only possible spherical and axially symmetric black hole exteriors, respectively. Also, we show that a Schwarzschild geometry is necessarily formed in the collapse of an uncharged sphere.

Appendices discuss relationships among relativistic gravity theories and an example of a theory in which black holes do not exist.

Item Type: | Thesis (Dissertation (Ph.D.)) | ||||||||
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Subject Keywords: | Physics | ||||||||

Degree Grantor: | California Institute of Technology | ||||||||

Division: | Physics, Mathematics and Astronomy | ||||||||

Major Option: | Physics | ||||||||

Thesis Availability: | Public (worldwide access) | ||||||||

Research Advisor(s): | - Thorne, Kip S.
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Group: | TAPIR, Astronomy Department | ||||||||

Thesis Committee: | - Unknown, Unknown
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Defense Date: | 28 September 1972 | ||||||||

Funders: |
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Record Number: | CaltechTHESIS:06022015-082916942 | ||||||||

Persistent URL: | https://resolver.caltech.edu/CaltechTHESIS:06022015-082916942 | ||||||||

DOI: | 10.7907/h455-hg42 | ||||||||

Default Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||

ID Code: | 8966 | ||||||||

Collection: | CaltechTHESIS | ||||||||

Deposited By: | INVALID USER | ||||||||

Deposited On: | 02 Jun 2015 17:24 | ||||||||

Last Modified: | 19 Apr 2021 22:34 |

## Thesis Files

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