Radiation from hot bare strange stars

Abstract

We present the results of numerical simulations of stationary, spherically outflowing, pair winds, with total luminosities of L=10^{35}- 10^{42} ergs/s. These results have direct relevance to the emission from hot, bare, strange stars, which are thought to be powerful sources of electron-positron pairs created by the Coulomb barrier at the quark surface. The spectra of emergent photons and pairs are calculated. For L > 2x10^{35} erg/s, photons dominate the emerging emission. As L increases from 10^{35} to 10^{42} ergs/s, the mean photon energy decreases from ~ 400-500 keV to 40 keV, while the spectrum changes in shape from a wide annihilation line to being nearly blackbody with a high energy (> 100 keV) tail. Such a correlation of the photon spectrum with the luminosity, together with the fact that super-Eddington luminosities can be achieved, might be a good observational signature of hot, bare, strange stars.

4 pages, 4 figures, Accepted in MNRAS, includes minor corrections

References in corpus (13)

• How Common Are Magnetars? The Consequences of Magnetic-Field Decay
• The Giant Flare of 1998 August 27 from SGR 1900+14: I. An Interpretive Study of BeppoSAX and Ulysses Observations
• Bare Quark Matter Surfaces of Strange Stars and $e^{+}{e}^{-}$ Emission
• Thermal Evolution and Light Curves of Young Bare Strange Stars
• Thermal emission from bare quark matter surfaces of hot strange stars
• Temporal and Spectral Characteristics of Short Bursts from the Soft Gamma Repeaters 1806-20 and 1900+14
• Color Superconductivity in Compact Stars
• An Unusual Burst from Soft Gamma Repeater SGR 1900+14: Comparisons with Giant Flares and Implications for the Magnetar Model
• Strange Star Heating Events as a Model for Giant Flares of Soft Gamma-ray Repeaters
• Non-equilibrium effects in steady relativistic $e^{+}{e}^{-}\gamma$ winds
• Low-mass normal-matter atmospheres of strange stars and their radiation
• Relativistic Outflow of Electron-Positron Pair Plasma from a Wien Equilibrium State
• Nature and Nurture: a model for soft gamma-ray repeaters

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• One-loop energy-momentum tensor in QED with electric-like background
• Structure of pair winds from compact objects with application to emission from hot bare strange stars
• Could the compact remnant of SN 1987A be a quark star?
• Fast Radio Bursts from the collapse of Strange Star Crusts
• Electromagnetic signals from bare strange stars
• Constraints on temporal variation of fundamental constants from GRBs
• Pair emission from bare magnetized strange stars
• Pair winds in Schwarzschild space-time with application to hot bare strange stars
• Cooling of a New Born Compact Star with QCD Phase Transition
• Luminosity of a quark star undergoing torsional oscillations and the problem of gamma ray bursts
• Structure of pair winds from compact objects with application to emission from bare strange stars
• Pair creation from radial electromagnetic perturbation of a compact astrophysical object