Journal
ASTRONOMY & ASTROPHYSICS
Volume 483, Issue 2, Pages 509-517Publisher
EDP SCIENCES S A
DOI: 10.1051/0004-6361:20079230
Keywords
gamma rays : observations; X-rays : general; galaxy : general; ISM : cosmic rays; ISM : clouds
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Funding
- Science and Technology Facilities Council [ST/F002963/1, PP/E001319/1] Funding Source: researchfish
- STFC [PP/E001319/1, ST/F002963/1] Funding Source: UKRI
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Aims. HESS J1745-303 is an extended, unidentified VHE (very high energy) gamma-ray source discovered using HESS in the Galactic Plane Survey. Since no obvious counterpart has previously been found in longer-wavelength data, the processes that power the VHE emission are not well understood. Methods. Combining the latest VHE data with recent XMM-Newton observations and a variety of source catalogs and lower-energy survey data, we attempt to match (from an energetic and positional standpoint) the various parts of the emission of HESS J1745-303 with possible candidates. Results. Though no single counterpart is found to fully explain the VHE emission, we postulate that at least a fraction of the VHE source may be explained by a supernova-remnant/molecular-cloud association and/or a high-spin-down-flux pulsar.
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