Gamma-ray and X-ray Properties of Pulsar Wind Nebulae and Unidentified Galactic TeV Sources

TL;DR

This paper reviews the properties of Galactic TeV sources, focusing on pulsar wind nebulae and unidentified sources, highlighting recent associations and the existence of 'dark' sources without counterparts at other wavelengths.

Contribution

It provides a comprehensive comparison of TeV and X-ray properties of PWNe, candidates, and unidentified sources, summarizing recent developments in source associations.

Findings

Pulsar wind nebulae are now the dominant population among VHE sources.

Many VHE sources remain unidentified, including 'dark' sources without multi-wavelength counterparts.

Recent associations have increased understanding of the nature of Galactic TeV sources.

Abstract

We review properties of Galactic VHE sources detected at TeV energies. The number of associations between the VHE sources and pulsars has grown in recent years, making pulsar-wind nebulae the dominant population, although there is still a substantial number of VHE sources which remain to be identified. Among the latter there are several "dark" sources which do not have plausible counterparts at any other wavelengths. In this review we compile and compare the TeV and X-ray properties of pulsar wind nebulae (PWNe), PWN candidates, and unidentified TeV sources.