Some effects of non-conservative gravity on cosmic string configurations
نویسندگان
چکیده
منابع مشابه
Evolution of cosmic string configurations.
We extend and develop our previous work on the evolution of a network of cosmic strings. The new treatment is based on an analysis of the probability distribution of the end-to-end distance, or extension, of a randomly chosen segment of left-moving string of given length. The description involves three distinct length scales: ξ, related to the overall string density, ¯ ξ, the persistence length...
متن کاملCharacteristics of cosmic string scaling configurations.
Using the formalism developed in a previous paper we analyze the cosmological implications of our conclusions concerning the scaling behaviour of a network of cosmic strings, in particular the idea that once gravitational backreaction becomes important the transient scaling regime so far explored by numerical simulations will be replaced by a new ‘full scaling’ regime, with slightly different p...
متن کاملSupermassive screwed cosmic string in dilaton gravity
The early Universe might have undergone phase transitions at energy scales much higher than the one corresponding to the Grand Unified Theories (GUT) scales. Then, at these higher energy scales, the transition at which gravity separated from all other interactions, the Planck era, more massive strings called supermassive cosmic strings, could be produced, with energy of about 10GeV . The dynami...
متن کاملCosmic String in Scalar-Tensor Gravity
The gravitational properties of a local cosmic string in the framework of scalar-tensor gravity are examined. We find the metric in the weak-field approximation and we show that, contrary to the General Relativity case, the cosmic string in scalar-tensor gravitation exerces a force on non-relativistic, neutral test particle. This force is proportional to the derivative of the conformal factor A...
متن کاملBrane World Linearized Cosmic String Gravity
The gravitational properties of cosmic strings in the Randall-Sundrum brane world scenario are investigated. Using a gauge in which the brane remains straight, the leading order corrections to the metric on the brane are determined. In contrast to their nonbrane equivalents, these strings have an attractive 1/r potential and a radially dependent deficit angle. These two effects alter many cosmo...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The European Physical Journal C
سال: 2019
ISSN: 1434-6044,1434-6052
DOI: 10.1140/epjc/s10052-019-6672-0