Chandra observation of the TeV source HESS J1834-087

Abstract

Chandra ACIS observed the field of the extended TeV source HESS J1834-087 for 47 ks. A previous XMM-Newton EPIC observation of the same field revealed a point-like source (XMMU J183435.3-084443) and an offset region of faint extended emission. In the low-resolution, binned EPIC images the two appear to be connected. However, the high-resolution Chandra ACIS images do not support the alleged connection. Instead, in these images XMMU J183435.3-084443 is resolved into a point source, CXOU~J183434.9--084443 (L=2.5 x 10e33 ergs/s, for a distance of 4 kpc; photon index 1.1), and a compact (~20'') nebula with an isotropic morphology and a softer spectrum (L=4.2 x10e33 ergs/s, photon index 2.7). The nature of the nebula is uncertain. We discuss a dust scattering halo and a pulsar-wind nebula as possible interpretations. Based on our analysis of the X-ray data, we re-evaluate the previously suggested interpretations of HESS J1834-087 and discuss a possible connection to the Fermi LAT source 1FGL J1834.3-0842c. We also obtained an upper limit of 3 x 10e-14 ergs/s cm^2 on the unabsorbed flux of the SGR J1833--0832 (in quiescence), which happened to be in the ACIS field of view.

11 pages, 7 figures, submitted to ApJ

References in corpus (11)

• Teraelectronvolt Astronomy
• Pulsar Wind Nebulae in the Chandra Era
• X-ray Observations of Parsec-Scale Tails behind Two Middle-Aged Pulsars
• The Distances of SNR W41 and overlapping HII regions
• VLA and XMM-Newton observations of the SNR W41/TeV Gamma-ray source HESS J1834-087
• Probing the Nature of the Vela X Cocoon
• On the plasma temperature in supernova remnants with cosmic-ray modified shocks
• Swift/XRT follow-up observations of TeV sources of the HESS Inner Galaxy survey
• Gamma-Ray Emission from PWNe Interacting with Molecular Clouds
• HESS J1632-478: an energetic relic
• High Energy Processes in Pulsar Wind Nebulae

Cited by in corpus (18)

• Interacting Cosmic Rays with Molecular Clouds: A Bremsstrahlung Origin of Diffuse High Energy Emission from the Inner 2deg by 1deg of the Galactic Center
• New constraints on the cooling of the Central Compact Object in Cas A
• Fermi LAT Observations of Supernova Remnants Interacting with Molecular Clouds: W41, MSH 17-39, and G337.0-0.1
• X-ray Observations of a New Unusual Magnetar Swift J1834.9-0846
• X-ray and radio observations of the magnetar Swift J1834.9-0846 and its dust-scattering halo
• Gamma-ray upper limits on magnetars with 6 years of Fermi-LAT observations
• Probing the gamma-ray emission from HESS J1834-087 using H.E.S.S. and Fermi LAT observations
• Euler-Plateau, with a twist
• A rotationally-powered magnetar nebula around Swift J1834.9-0846
• Origin of TeV Galactic Cosmic Rays
• Massive stars in the giant molecular cloud G23.3-0.3 and W41
• Observational constraints on the maximum energies of accelerated particles in supernova remnants: low maximum energies and a large variety
• Evidence of a Hadronic Origin for the TeV Source J1834-087
• Study on the escape timescale of high-energy particles from supernova remnants through thermal X-ray properties
• The Interaction Between the Supernova Remnant W41 and the Filamentary Infrared Dark Cloud G23.33-0.30
• XMM-Newton Observations of Two Candidate Supernova Remnants
• The HI absorption distance of HESS J1943+213 favours its extragalactic nature
• X-ray Monitoring of the Magnetar CXOU J171405.7-381031 in SNR CTB 37B