Journal article
Nonthermal emission from the Arches cluster (G0.121+0.017) and the origin of gamma-ray emission from 3EG J1746-2851
The Astrophysical journal, Vol.590(2), pp.L103-L106
06/20/2003
DOI: 10.1086/376854
Abstract
High-resolution Very Large Array observations of the Arches cluster near the Galactic center show evidence of continuum emission at lambda = 3.6, 6, 20, and 90 cm. The continuum emission at lambda = 90 cm is particularly striking because thermal sources generally become optically thick at longer wavelengths and fall off in brightness, whereas nonthermal sources increase in brightness. It is argued that the radio emission from this unique source has compact and diffuse components produced by thermal and nonthermal processes, respectively. Compact sources within the cluster arise from stellar winds of mass-losing stars, whereas diffuse emission is likely to be due to colliding wind shocks of the cluster flow that generate relativistic particles that are due to diffuse shock acceleration. We also discuss the possibility that gamma-ray emission from 3EG J1746-2851, located within 3.'3 of the Arches cluster, results from the inverse Compton scattering of the radiation field of the cluster.
Details
- Title: Subtitle
- Nonthermal emission from the Arches cluster (G0.121+0.017) and the origin of gamma-ray emission from 3EG J1746-2851
- Creators
- F Yusef-Zadeh - Northwestern UniversityM Nord - United States Naval Research LaboratoryM Wardle - Macquarie UniversityC Law - Northwestern UniversityC Lang - University of IowaTJW Lazio
- Resource Type
- Journal article
- Publication Details
- The Astrophysical journal, Vol.590(2), pp.L103-L106
- DOI
- 10.1086/376854
- ISSN
- 0004-637X
- eISSN
- 1538-4357
- Publisher
- Iop Publishing Ltd
- Number of pages
- 4
- Language
- English
- Date published
- 06/20/2003
- Academic Unit
- Liberal Arts and Science Admin; Physics and Astronomy
- Record Identifier
- 9984428764602771
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