Effective photon mass from black-hole formation
نویسندگان
چکیده
منابع مشابه
Black-hole bombs and photon-mass bounds.
Generic extensions of the standard model predict the existence of ultralight bosonic degrees of freedom. Several ongoing experiments are aimed at detecting these particles or constraining their mass range. Here we show that massive vector fields around rotating black holes can give rise to a strong superradiant instability, which extracts angular momentum from the hole. The observation of super...
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Both the recently observed high runaway velocities of Cyg X-1 (∼ 50 km s) and X-ray Nova Sco 1994 (≥ 100 km s) and the relatively low radial velocities of the black hole X-ray binaries with low mass donor stars, can be explained by symmetric mass ejection in the supernovae (SNe) which formed the black holes in these systems. Assuming symmetric mass ejection in black hole formation, we estimate ...
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We present a series of two-dimensional core-collapse supernova simulations for a range of progenitor masses and di†erent input physics. These models predict a range of supernova energies and compact remnant masses. In particular, we study two mechanisms for black hole formation : prompt collapse and delayed collapse owing to fallback. For massive progenitors (greater than 20 after a hydrodynami...
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Measurements of the distances to SNe Ia have produced strong evidence that the Universe is really accelarating, implying the existence of a nearly uniform component of dark energy with the simplest explanation as a cosmological constant. In this paper a small changing cosmological term is proposed, which is a function of a slow-rolling scalar field, by which the de Sitter primordial black holes...
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It is shown that there exists a range of parameters in which gravitational collapse with a spherically symmetric massive scalar field can be treated as if it were collapsing dust. This implies a criterion for the formation of black holes depending on the size and mass of the initial field configuration and the mass of the scalar field. Pacs numbers: 03.70.+k, 98.80.Cq Typeset using REVTEX
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ژورنال
عنوان ژورنال: Nuclear Physics B
سال: 2017
ISSN: 0550-3213
DOI: 10.1016/j.nuclphysb.2017.03.016