The H.E.S.S. Galactic Plane Survey - maps, source catalog and source population

TL;DR

The H.E.S.S. Galactic Plane Survey provides the first comprehensive TeV gamma-ray map of the inner Galaxy, revealing over 60 sources, predominantly pulsar wind nebulae and supernova remnants, with many sources still unidentified.

Contribution

This work presents the latest significance and sensitivity maps, a uniform re-analysis of the data set, and an updated source catalog for the HGPS, advancing our understanding of the Galactic TeV gamma-ray population.

Findings

Over 60 TeV gamma-ray sources identified

Dominance of pulsar wind nebulae and supernova remnants

Nearly one-third of sources remain unidentified or ambiguous

Abstract

The H.E.S.S. Galactic Plane Survey (HGPS), the first comprehensive survey of the inner Galaxy at TeV energies, has led to the discovery of an unexpectedly large and diverse population of over 60 sources of TeV gamma rays within its current range of l = 250 to 65 degrees in longitude and |b| < 3.5 degrees in latitude. The data set of the HGPS comprises 2800 hours of high-quality data, taken in the years 2004 to 2013. The sensitivity for the detection of point-like sources is at the level of 2% Crab or better in the HGPS region. The population of TeV gamma-ray emitters is dominated by the pulsar wind nebula and supernova remnant source classes, although nearly a third of the sources remain unidentified or ambiguous. We are presenting the latest HGPS significance and sensitivity maps, as well as a work on the HGPS source catalog, based on a uniform re-analysis of the full data set collected in the last decade. We will also give a brief overview of the H.E.S.S. Galactic source population.