Radio counterparts of gamma-ray sources in the Cygnus region
| Autor: | Paula Benaglia, Marcelo E. Colazo, Huib Intema, Josep M. Paredes, C. H. Ishwara-Chandra, N. L. Isequilla |
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| Rok vydání: | 2021 |
| Předmět: |
Supernova remnants
media_common.quotation_subject Astrophysics::High Energy Astrophysical Phenomena Population FOS: Physical sciences Context (language use) Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Surveys 01 natural sciences purl.org/becyt/ford/1 [https] Pulsar 0103 physical sciences Angular resolution 010306 general physics education 010303 astronomy & astrophysics Pulsars media_common Physics High Energy Astrophysical Phenomena (astro-ph.HE) Giant Metrewave Radio Telescope education.field_of_study Spectral index Gamma-ray sources RADIO CONTINUUM EMISSION Gamma ray 1667 1306 633 1340 205 1671 Astronomy and Astrophysics purl.org/becyt/ford/1.3 [https] PULSARS Catalogues Universe Radio continuum emission Space and Planetary Science GAMMA-RAY SOURCES SUPERNOVA REMNANTS Catalogs Astrophysics - High Energy Astrophysical Phenomena |
| Zdroj: | CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET The Astrophysical Journal Supplement Series, 252(2) Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | The view of the gamma-ray universe is being continuously expanded by space high energy (HE) and ground based very-high energy (VHE) observatories. Yet, the angular resolution limitation still precludes a straightforward identification of these gamma-ray emitting sources. Radio observations are an effective tool for searching their possible counterparts at lower energies because the same population of relativistic electrons responsible for radio emission can also produce HE/VHE emission via inverse-Compton scattering. The Cygnus region is crowded by many gamma-ray sources, most of them remaining unidentified. In order to find possible counterparts to unidentified gamma-ray sources, we carried out a deep survey of the Cygnus region using the Giant Metrewave Radio Telescope at 610 MHz and 325 MHz. We did a detailed search for counterparts in the error circle of HE/VHE sources. We report 36 radio sources found in the error ellipse of 15 HE sources, and 11 in those of VHE sources. Eight sources have very steep radio spectral index alpha Comment: Accepted for publication in ApJS, 24 pages, 20 figures, 7 tables |
| Databáze: | OpenAIRE |
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