| DOI | Trouver le DOI : https://doi.org/10.1093/mnras/staa1573 |
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| Auteur | Rechercher : Kothes, R.1; Rechercher : Reich, W.; Rechercher : Safi-Harb, S.1; Rechercher : Guest, B.Identifiant ORCID : https://orcid.org/0000-0003-4078-0251; Rechercher : Reich, P.; Rechercher : Fürst, E. |
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| Affiliation | - Conseil national de recherches du Canada. Herzberg en astronomie et en astrophysique
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| Format | Texte, Article |
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| Sujet | magnetic fields; polarization; ISM: individual objects: CTB 87; ISM: magnetic fields; ISM: supernova remnants |
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| Résumé | We present radio continuum and linear polarization observations of the pulsar wind nebula (PWN) CTB 87 (G74.9+1.2) with the Effelsberg 100-m Radio Telescope between 4.75 and 32 GHz. An analysis of these new data including archived low-frequency observations at 1420 and 408 MHz from the Canadian Galactic Plane Survey shows that CTB 87 consists of two distinct emission components: a compact kidney-shaped component, 14 × 8.5 pc² (7.8 × 4.8 arcmin²) in size and a larger diffuse, spherical, and centrally peaked component of about 30 pc (17 arcmin) in diameter. The kidney-shaped component with a much steeper radio continuum spectrum is highly linearly polarized and likely represents a relic PWN. The diffuse component represents the undisturbed part of the PWN expanding inside a cavity or stellar wind bubble. The previously reported spectral break above 10 GHz is likely the result of missing large-scale emission and insufficient sensitivity of the high-frequency radio continuum observations. The simulation of the system’s evolution yields an age of about 18 000 yr as the result of a Type II supernova explosion with ejecta mass of about 12 M⊙ and explosion energy of about 7 × 10⁵⁰ erg. We also found evidence for a radio shell in our polarization data that represents the blast wave that entered the molecular cloud complex at a radius of about 13 pc. |
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| Date de publication | 2020-06-11 |
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| Maison d’édition | Oxford |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 7efb58a9-2045-4ce2-a88b-af85b96a557b |
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| Enregistrement créé | 2021-12-03 |
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| Enregistrement modifié | 2021-12-03 |
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