HESS J1826−130: A very hard γ-ray spectrum source in the galactic plane

Angüner, E. O.; Aharonian, F.; Bordas, P.; Casanova, S.; Hoischen, C.; Oya, I.; Ziegler, Andreas

doi:10.1063/1.4968928

Cited by 3 publications

(1 citation statement)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We will use the GC-model to predict the incomplete spectra of the following three examples. J1826-130 is an unidentified hard spectrum source discovered by HESS along the Galactic plane [18], and was previously hidden in the extended tail of emission from the nearby bright source HESS J1825-137. HESS J1826-130 shows a relatively hard gamma-ray spectrum, which obviously incomplete.…”

Section: Hesss J1826-130 J1641-463 and J1741-302mentioning

confidence: 99%

Exploring the possible gluon condensation signature in gamma-ray emission from pulsars

Ruan¹,

Zheng²,

Zhu³

2021

J. Cosmol. Astropart. Phys.

View full text Add to dashboard Cite

The very high energy gamma-ray emissions from pulsars are usually considered to be dominated by leptonic scenario since the hadronic flux is weak. We point out that the gluon condensation predicted by a nonlinear QCD evolution equation may greatly enhance the cross sections of proton-target interactions and give rise to a characteristic broken power law in the gamma-ray spectra. The result is used to explore the gluon condensation signature in the observed gamma-ray spectra from pulsars.

show abstract

Section: Hesss J1826-130 J1641-463 and J1741-302mentioning

confidence: 99%

Exploring the possible gluon condensation signature in gamma-ray emission from pulsars

Ruan¹,

Zheng²,

Zhu³

2021

J. Cosmol. Astropart. Phys.

View full text Add to dashboard Cite

show abstract

The H.E.S.S. Galactic plane survey

Abdalla¹,

Abramowski²,

Aharonian³

et al. 2018

A&A

345

155

View full text Add to dashboard Cite

We present the results of the most comprehensive survey of the Galactic plane in very high-energy (VHE) γ-rays, including a public release of Galactic sky maps, a catalog of VHE sources, and the discovery of 16 new sources of VHE γ-rays. The High Energy Spectroscopic System (H.E.S.S.) Galactic plane survey (HGPS) was a decade-long observation program carried out by the H.E.S.S. I array of Cherenkov telescopes in Namibia from 2004 to 2013. The observations amount to nearly 2700 h of quality-selected data, covering the Galactic plane at longitudes from ℓ = 250° to 65° and latitudes |b|≤ 3°. In addition to the unprecedented spatial coverage, the HGPS also features a relatively high angular resolution (0.08° ≈ 5 arcmin mean point spread function 68% containment radius), sensitivity (≲1.5% Crab flux for point-like sources), and energy range (0.2–100 TeV). We constructed a catalog of VHE γ-ray sources from the HGPS data set with a systematic procedure for both source detection and characterization of morphology and spectrum. We present this likelihood-based method in detail, including the introduction of a model component to account for unresolved, large-scale emission along the Galactic plane. In total, the resulting HGPS catalog contains 78 VHE sources, of which 14 are not reanalyzed here, for example, due to their complex morphology, namely shell-like sources and the Galactic center region. Where possible, we provide a firm identification of the VHE source or plausible associations with sources in other astronomical catalogs. We also studied the characteristics of the VHE sources with source parameter distributions. 16 new sources were previously unknown or unpublished, and we individually discuss their identifications or possible associations. We firmly identified 31 sources as pulsar wind nebulae (PWNe), supernova remnants (SNRs), composite SNRs, or gamma-ray binaries. Among the 47 sources not yet identified, most of them (36) have possible associations with cataloged objects, notably PWNe and energetic pulsars that could power VHE PWNe.

show abstract