Multistate boson stars

Bernal, Argelia; Barranco, J.; Alic, Daniela; Palenzuela, Carlos

doi:10.1103/physrevd.81.044031

Cited by 125 publications

(157 citation statements)

References 39 publications

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“…The question of stability of mixed configurations of scalar field similar to the ones we considered has been studied numerically in other works [36,38]. In [36], they present a stability study of multi-state configurations.…”

Section: Discussionmentioning

confidence: 99%

“…In [36], they present a stability study of multi-state configurations. They show that stable configurations can be constructed when the number of particles in the first excited state is smaller than the number of particles in the ground state, which is satisfied in all our fits, thus we expect our configurations to be long lived too.…”

Section: Discussionmentioning

confidence: 99%

“…On the other hand, we will stress that accounting for the possibility of excited state configurations for the scalar field avoids any tension and therefore eliminates the need to have only one relevant scale length for the ground (condensed) state in all galaxies, the idea to include more than the ground state has been explored in other contexts too [36][37][38].…”

Section: Introductionmentioning

confidence: 99%

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Dwarf galaxies in multistate scalar field dark matter halos

Martinez-Medina

Robles²,

Matos³

2015

Phys. Rev. D

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We analyse the velocity dispersion for eight of the Milky Way dwarf spheroidal satellites in the context of finite temperature scalar field dark mater. In this model the finite temperature allows the scalar field to be in configurations that possess excited states, a feature that has proved to be necessary in order to explain the asymptotic rotational velocities found in low surface brightness (LSB) galaxies. In this work we show that excited states are not only important in large galaxies but also have visible effects in dwarf spheroidals. Additionally, we stress that contrary to previous works where the scalar field dark matter haloes are consider to be purely Bose-Einstein condensates, the inclusion of excited states in these halo configurations provides a consistent framework capable of describing LSBs and dwarf galaxies of different sizes without arriving to contradictions within the scalar field dark matter model. Using this new framework we find that the addition of excited states accounts very well for the raise in the velocity dispersion in Milky Way dwarf spheroidal galaxies improving the fit compared to the one obtained assuming all the DM to be in the form of a Bose Einstein Condensate.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dwarf galaxies in multistate scalar field dark matter halos

Martinez-Medina

Robles²,

Matos³

2015

Phys. Rev. D

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“…There has been considerable work in finding numerical solutions to the noninteracting SFDM in the non-relativistic regime to model spherically symmetric haloes 3,8,25,26,31,72 , and also for the self-interacting SFDM 2,4,12,21,53,55 , it is worth noting that as mentioned in 26 for the weak field limit of the system that determines the evolution of a spherically symmetric scalar field, that is, the Einstein and KleinGordon equations, for a complex and a real scalar field the system reduces to the Schrödinger-Poisson (SP) equations 1 . The contraints reported in 37 , obtained by imposing that the SF behaves cosmologically as pressureless matter (dust), imply that the interacting parameter would be extremely small for the typical mass of ∼10 −22 eV/c 2 , therefore we expect that solutions to the SP system with no interactions would behave qualitatively similar to those when self-interactions are included, as supported by the similarity in the solutions of the non-iteracting case and those with a small self-coupling found in other works 2,10,12 .…”

Section: Scalar Field Dark Matter Halosmentioning

confidence: 99%

Scalar field (wave) dark matter

Matos¹,

Robles²

2017

The Fourteenth Marcel Grossmann Meeting

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Recent high-quality observations of dwarf and low surface brightness (LSB) galaxies have shown that their dark matter (DM) halos prefer flat central density profiles. On the other hand the standard cold dark matter model simulations predict a more cuspy behavior. Feedback from star formation has been widely used to reconcile simulations with observations, this might be successful in field dwarf galaxies but its success in low mass galaxies remains uncertain. One model that have received much attention is the scalar field dark matter model. Here the dark matter is a self-interacting ultra light scalar field that forms a cosmological Bose-Einstein condensate, a mass of 10 −22 eV/c 2 is consistent with flat density profiles in the centers of dwarf spheroidal galaxies, reduces the abundance of small halos, might account for the rotation curves even to large radii in spiral galaxies and has an early galaxy formation. The next generation of telescopes will provide better constraints to the model that will help to distinguish this particular alternative to the standard model of cosmology shedding light into the nature of the mysterious dark matter.

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“…Finally, we anticipate that the Newtonian approach to the boson star would be valid for a multi-scalar system with many U(1) charges, such as the 'multi-state boson star' [23], and the boson-fermion system [24][25][26][27], in order to extract its inherent characteristics in an efficient manner.…”

Section: Summary and Prospectsmentioning

confidence: 99%

Analytical approximation for Newtonian boson stars in four and five dimensions

Kan

Shiraishi

2016

Phys. Rev. D

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In this paper, we study rotating boson stars in the large coupling limit as well as in the Newtonian limit. We investigate the equilibrium solutions in four and five dimensions by adopting some analytical approximations. We show that the relations among the radius, angular momentum, Newtonian energy, and quadrupole moment (for the four-dimensional solution) of the boson star can be qualitatively realized for the minimal number of boson-star parameters.

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Multistate boson stars

Cited by 125 publications

References 39 publications

Dwarf galaxies in multistate scalar field dark matter halos

Dwarf galaxies in multistate scalar field dark matter halos

Scalar field (wave) dark matter

Analytical approximation for Newtonian boson stars in four and five dimensions

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