# Compact (A)dS boson stars and shells

@article{Hartmann2013CompactB, title={Compact (A)dS boson stars and shells}, author={Betti Hartmann and Burkhard Kleihaus and Jutta Kunz and Isabell Schaffer}, journal={Physical Review D}, year={2013}, volume={88}, pages={124033} }

We present compact Q-balls in an (Anti-)de Sitter background in D dimensions, obtained with a V-shaped potential of the scalar field. Beyond critical values of the cosmological constant compact Q-shells arise. By including the gravitational back-reaction, we obtain boson stars and boson shells with (Anti-)de Sitter asymptotics. We analyze the physical properties of these solutions and determine their domain of existence. In four dimensions we address some astrophysical aspects.

## Figures from this paper

## 17 Citations

### Charged Compact Boson Stars in a Theory of Massless Scalar Field

- Physics
- 2018

In this work we present some new results obtained in a study of the phase diagram of charged compact boson stars in a theory involving a complex scalar field with a conical potential coupled to a…

### Boson Stars and Boson Shells

- Physics
- 2018

In this work we present a broad formalism for a study of the models of black holes, boson stars, boson shells and wormholes. The studies of boson stars and boson shells in a theory involving Scalar…

### Boson stars in a theory of complex scalar fields coupled to the U(1) gauge field and gravity

- Physics
- 2014

We study boson shells and boson stars in a theory of a complex scalar field coupled to the U ( 1 ) ?> gauge field A μ ?> and Einstein gravity with the potential V ( | Φ | ) := 1 2 m 2 | Φ | + a 2 ?>…

### Boson Stars and QCD Boson Stars

- Physics
- 2020

In this talk, we present a review of our work on boson stars in a theory of a massless complex scalar field in the presence of a $U(1)$ gauge field and gravity. A sequence of bifurcation points…

### Phase diagrams of charged compact boson stars

- PhysicsThe European Physical Journal C
- 2019

Compact boson stars, whose scalar field vanishes identically in the exterior region, arise in a theory involving a massless complex scalar field with a conical potential, when coupled to gravity.…

### Dynamical Boson Stars

- PhysicsLiving reviews in relativity
- 2012

This work discusses important varieties of boson stars, their dynamic properties, and some of their uses, concentrating on recent efforts.

### Compact Q -balls and Q -shells in CPN -type models

- Mathematics, Physics
- 2017

We show that the CPN model with odd number of scalar fields and V-shaped potential possesses finite energy compact solutions in the form of Q-balls and Q-shells. The solutions were obtained in 3+1…

### Effect of Cosmological Constant on Amplitude Variation of Boson Star

- Physics
- 2020

In recent years, scientists have discovered that the expansion rate of the Universe is increasing rather than decreasing [1, 2]. The cosmic acceleration leads to an additional term in Einstein’s…

## References

SHOWING 1-10 OF 106 REFERENCES

### Rotating boson stars and Q-balls

- Physics
- 2005

We consider axially symmetric, rotating boson stars. Their flat-space limits represent spinning Q-balls. We discuss their properties and determine their domain of existence. Q-balls and boson stars…

### Q-Stars in Anti de Sitter Spacetime

- Physics
- 2004

We study q-stars with various symmetries in anti de Sitter spacetime in 3+1 dimensions. Comparing with the case of flat spacetime, we find that the value of the field at the center of the soliton is…

### Rotating boson stars and Q-balls. II. Negative parity and ergoregions

- Physics
- 2008

We construct axially symmetric, rotating boson stars with positive and negative parity. Their flat space limits represent spinning Q-balls. Q-balls and boson stars exist only in a limited frequency…

### Supersymmetric Q-balls and boson stars in (d + 1) dimensions

- Physics
- 2013

We construct supersymmetric Q-balls and boson stars in (d + 1) dimensions. These non-topological solitons are solutions of a scalar field model with global U(1) symmetry and a scalar field potential…

### Stable Phases of Boson Stars

- Physics
- 2012

We analyze the physical properties of boson stars, which possess counterparts in flat space-time, Q-balls. Applying a stability analysis via catastrophe theory, we show that the families of rotating…

### Boson shells harboring charged black holes

- Physics
- 2010

We consider boson shells in scalar electrodynamics coupled to Einstein gravity. The interior of the shells can be empty space, or harbor a black hole or a naked singularity. We analyze the properties…