# Scalar field “mini-MACHOs”: A new explanation for galactic dark matter

@article{Hernandez2004ScalarF,
title={Scalar field “mini-MACHOs”: A new explanation for galactic dark matter},
author={Xavier Hern'andez and Tonatiuh Matos and Roberto A. Sussman and Yosef Verbin},
journal={Physical Review D},
year={2004},
volume={70},
pages={043537}
}
• Published 12 July 2004
• Physics
• Physical Review D
We examine the possibility that galactic halos are collisionless ensembles of scalar field massive compact halo objects'' (MACHOs). Using mass constraints from MACHO microlensing and from theoretical arguments on halos made up of massive black holes, as well as demanding also that scalar MACHO ensembles of all scales do not exhibit gravothermal instability (as required by consistency with observations of LSB galaxies), we obtain the range: $m\ensuremath{\lesssim}{10}^{\ensuremath{-}7}{M}_… 27 Citations ## Figures from this paper I show that a recently discovered star cluster near the center of the ultra-faint dwarf galaxy Eridanus II provides strong constraints on massive compact halo objects (MACHOs) of ≳5 M⊙ as the main • Physics • 2010 The existence and detection of scalar fields could provide solutions to long- standing puzzles about the nature of dark matter, the dark compact objects at the centre of most galaxies, and other • Physics • 2007 We investigate the success and problems of modified Newtonian dynamics (MOND) in explaining the structural parameters and dynamics of remote Galactic globular clusters (GCs) and dwarf spheroidal • Physics Universe • 2018 Dark matter may be composed of self-interacting ultralight quantum fields that form macroscopic objects. An example of which includes Q-balls, compact non-topological solitons predicted by a range of • Physics • 2017 Light (pseudo-)scalar fields are promising candidates to be the dark matter in the Universe. Under certain initial conditions in the early Universe and/or with certain types of self-interactions, • Physics • 2006 In the brane world scenario, the four-dimensional effective Einstein equation has extra terms that arise from the embedding of the 3-brane in the bulk. These nonlocal effects may provide an • Physics • 2013 We show that even a rather minimal extension of the Einstein–Hilbert action by a nonminimal coupling of the scalar field to the Ricci curvature scalar results in configurations that resemble more the • Physics • 2014 We explore two scenarios where the axion–photon interaction could induce additional astrophysical gamma ray signals for the dark matter. In the first scenario, dark compact objects made of axions, • Physics • 2012 Once the critical temperature of a cosmological boson gas is less than the critical temperature, a Bose-Einstein Condensation process can always take place during the cosmic history of the universe. ## References SHOWING 1-10 OF 65 REFERENCES • Materials Science, Mathematics • 2001 We present the complete solution to a$95%$scalar field cosmological model in which the dark matter is modeled by a scalar field$\ensuremath{\Phi}$with the scalar potential • Physics • 2001 The nature of the dark matter that binds galaxies remains an open question. The favored candidate has so far been the neutralino. This massive species with evanescent interactions is now in • Physics • 1993 If the dark matter in galactic halos is made up of compact, macroscopic objects (MO), such as black holes with$M_\MO >>M_{stars}\$, gravitational scattering will lead to kinematic heating of the
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