Brans-Dicke Theory with $Λ{\ensuremath >} 0$: Black Holes and Large Scale Structures

Abstract

A step-by-step approach is followed to study cosmic structures in the context of Brans-Dicke theory with positive cosmological constant $\Lambda$ and parameter $\omega$. First, it is shown that regular stationary black-hole solutions not only have constant Brans-Dicke field $\varphi$, but can exist only for $\omega =\infty$, which forces the theory to coincide with the General Relativity. Generalizations of the theory in order to evade this black-hole no-hair theorem are presented. It is also shown that in the absence of a stationary cosmological event horizon in the asymptotic region, a stationary black hole horizon can support a non-trivial Brans-Dicke hair. Even more importantly, it is shown next, that the presence of a stationary cosmological event horizon rules out any regular stationary solution, appropriate for the description of a star. Thus, to describe a star one has to assume that there is no such stationary horizon in the faraway asymptotic region. Under this implicit assumption generic spherical cosmic structures are studied perturbatively and is shown that only for $\omega >0$ or $\omega \lesssim -5$ their predicted maximum sizes are consistent with observations. We also point out how, many of the conclusions of this work differ qualitatively from the $\Lambda =0$ spacetimes.

arXiv commentv4, 14pp; information regarding affiliation of A. E. Romano corrected and updated; the title now matches with that of the journal; rest remains the same

References in corpus (15)

• Modified Gravity and Cosmology
• Black hole hair in generalized scalar-tensor gravity
• Black holes in scalar-tensor gravity
• An introduction to the Vainshtein mechanism
• A no-hair theorem for the galileon
• Cosmological Multi-Black Hole Solutions
• Cosmological constraints on Brans-Dicke theory
• Charged Galileon black holes
• Where the world stands still: turnaround as a strong test of ΛCDM cosmology
• Non-Existence of Black Holes with Non-Canonical Scalar Fields
• Constraining Dark Energy through the Stability of Cosmic Structures
• No hair theorems for positive Λ
• A Cosmological No-Hair Theorem
• Lifshitz black holes in Brans-Dicke theory
• Note on black hole no hair theorems for massive forms and spin-1/2 fields

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