### Abstract

Lingua originale | English |
---|---|

pagine (da-a) | 075002- |

Numero di pagine | 7 |

Rivista | Physica Scripta |

Volume | 89 |

Stato di pubblicazione | Published - 2014 |

### Fingerprint

### All Science Journal Classification (ASJC) codes

- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Mathematical Physics

### Cita questo

*Physica Scripta*,

*89*, 075002-.

**Spectral energy distribution and generalized Wien's law for photons and cosmic string loops.** / Mongiovi', Maria Stella; Sciacca, Michele; Jou; Sciacca.

Risultato della ricerca: Article

*Physica Scripta*, vol. 89, pagg. 075002-.

}

TY - JOUR

T1 - Spectral energy distribution and generalized Wien's law for photons and cosmic string loops

AU - Mongiovi', Maria Stella

AU - Sciacca, Michele

AU - Jou, null

AU - Sciacca, null

PY - 2014

Y1 - 2014

N2 - Physical objects with energy $u_w(l) \sim l^{-3w}$ with $l$ characteristic length and $w$ a dimensionless constant, lead to an equation of state $p=w\rho$, with $p$ the pressure and $\rho$ the energy density. Special entities with thisbproperty are, for instance, photons ($u = hc/l$, with $l$ the wavelength) with $w = 1/3$, and some models of cosmic string loops ($u =(c^4/aG)l$, with $l$ the length of the loop and $a$ a numerical constant), with $w = -1/3$. Here, we discuss some features of the spectral energy distribution of these systems and the corresponding generalization of Wien's law, which in terms of $l$ has the form $Tl_{mp}^{3w}=constant$, being $l_{mp}$ the most probable size of the mentioned entities.

AB - Physical objects with energy $u_w(l) \sim l^{-3w}$ with $l$ characteristic length and $w$ a dimensionless constant, lead to an equation of state $p=w\rho$, with $p$ the pressure and $\rho$ the energy density. Special entities with thisbproperty are, for instance, photons ($u = hc/l$, with $l$ the wavelength) with $w = 1/3$, and some models of cosmic string loops ($u =(c^4/aG)l$, with $l$ the length of the loop and $a$ a numerical constant), with $w = -1/3$. Here, we discuss some features of the spectral energy distribution of these systems and the corresponding generalization of Wien's law, which in terms of $l$ has the form $Tl_{mp}^{3w}=constant$, being $l_{mp}$ the most probable size of the mentioned entities.

UR - http://hdl.handle.net/10447/99818

M3 - Article

VL - 89

SP - 075002-

JO - Physica Scripta

JF - Physica Scripta

SN - 0031-8949

ER -