NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Gravitational lensing effects of vacuum strings - Exact solutionsExact interior and exterior solutions to Einstein's field equations are derived for vacuum strings. The exterior solution for a uniform density vacuum string corresponds to a conical space while the interior solution is that of a spherical cap. For Mu equals 0-1/4 the external metric is ds-squared = -dt-squared + dr-squared + (1-4 Mu)-squared r-squared dphi-squared + dz-squared, where Mu is the mass per unit length in the string in Planck masses per Planck length. A maximum mass per unit length for a string is 6.73 x 10 to the 27th g/cm. It is shown that strings cause temperature fluctuations in the cosmic microwave background and produce equal brightness double QSO images separated by up to several minutes of arc. Formulae for lensing probabilities, image splittings, and time delays are derived for strings in a realistic cosmological setting. String searches using ST, the VLA, and the COBE satellite are discussed.
Document ID
19850042177
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Gott, J. R., III
(Princeton University Princeton, NJ, United States)
Date Acquired
August 12, 2013
Publication Date
January 15, 1985
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 288
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
85A24328
Funding Number(s)
CONTRACT_GRANT: NAGW-626
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available