تقرير
X-ray and Radio Variabilities of PSR J2032+4127 near Periastron
| العنوان: | X-ray and Radio Variabilities of PSR J2032+4127 near Periastron |
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| المؤلفون: | Ng, C. -Y., Ho, W. C. G., Gotthelf, E. V., Halpern, J. P., Coe, M. J., Stappers, B. W., Lyne, A. G., Wood, K. S., Kerr, M. |
| سنة النشر: | 2019 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - High Energy Astrophysical Phenomena |
| الوصف: | We present X-ray and radio monitoring observations of the gamma-ray binary PSR J2032+4127/MT91 213 during its periastron passage in late 2017. Dedicated Chandra, XMM-Newton,NuSTAR X-ray observations and VLA radio observations of this long orbit (50 years), 143 ms pulsar/Be star system clearly revealed flux and spectral variability during the passage. The X-ray spectrum hardened near periastron, with a significant decrease in the power-law photon index from \Gamma ~ 2 to 1.2 and evidence of an increased absorption column density. We identified a possible spectral break at a few keV in the spectrum that suggests synchrotron cooling. A coincident radio and X-ray flare occurred one week after periastron, which is possibly the result of the pulsar wind interacting with the Be stellar disk and generating synchrotron radiation. However, a multi-wavelength comparison indicate that the X-ray and radio spectra cannot be simply connected by a single power-law component. Hence, the emission in these two energy bands must originate from different particle populations. Comment: Accepted for publication in the ApJ |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.3847/1538-4357/ab2adb |
| URL الوصول: | http://arxiv.org/abs/1907.05749 |
| رقم الأكسشن: | edsarx.1907.05749 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.3847/1538-4357/ab2adb |
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