تقرير
The High-Energy Emission from HD 93129A Near Periastron
| العنوان: | The High-Energy Emission from HD 93129A Near Periastron |
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| المؤلفون: | S del Palacio, F. Garcia, D. Altamirano, R H Barbá, V. Bosch Ramon, M Corcoran, M. De Becker, K. Hamaguchi, J Maíz Apellániz, P. Munar Adrover, J. M. Paredes, G. E. Romero, H. Sana, M. Tavani, A. ud-Doula |
| المصدر: | Monthly Notices of the Royal Academy of Science. 494(4) |
| بيانات النشر: | United States: NASA Center for Aerospace Information (CASI), 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Astrophysics |
| الوصف: | We conducted an observational campaign towards one of the most massive and luminous colliding wind binaries in the Galaxy, HD 93129A, close to its periastron passage in 2018. During this time the source was predicted to be in its maximum of high-energy emission. Here we present our data analysis from the X-ray satellites Chandra and NuSTAR and the γ-ray satellite AGILE. High-energy emission coincident with HD 93129A was detected in the X-ray band up to 18 keV, whereas in the γ-ray band only upper limits were obtained. We interpret the derived fluxes using a non-thermal radiative model for the wind-collision region. We establish a conservative upper limit for the fraction of the wind kinetic power that is converted into relativistic electron acceleration, f(NT,e) < 0.02. In addition, we set a lower limit for the magnetic field in the wind-collision region as BWCR > 0.3 G. We also argue a putative interpretation of the emission from which we estimate f(NT,e) ≈ 0.006 and B(WCR) ≈ 0.5 G. We conclude that multi-wavelength, dedicated observing campaigns during carefully selected epochs are a powerful tool for characterising the relativistic particle content and magnetic field intensity in colliding wind binaries. |
| نوع الوثيقة: | Report |
| اللغة: | English |
| تدمد: | 1365-2966 0035-8711 |
| DOI: | 10.1093/mnras/staa1156 |
| URL الوصول: | https://ntrs.nasa.gov/citations/20205001144 |
| ملاحظات: | 80GSFC17M0002 184.034.002 AYA2016-76012-C3-1- P MDM-2014-0369 DEC 2017 SGR 643 PGC2018-095 049-B-C22 DIDULS 18143 GO8-19010A |
| رقم الأكسشن: | edsnas.20205001144 |
| قاعدة البيانات: | NASA Technical Reports |
Full Text Finder | تدمد: | 13652966 00358711 |
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| DOI: | 10.1093/mnras/staa1156 |