دورية أكاديمية
The coronal temperature of NGC 4388 and NGC 2110 measured with INTEGRAL*
| العنوان: | The coronal temperature of NGC 4388 and NGC 2110 measured with INTEGRAL* |
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| المؤلفون: | Ursini, F., Bassani, L., Malizia, A., Bazzano, A., Bird, A.J., Stephen, J.B., Ubertini, P. |
| سنة النشر: | 2019 |
| المجموعة: | University of Southampton: e-Prints Soton |
| الوصف: | Aims: we aim to measure the physical properties of the hot X-ray corona of two active galactic nuclei, NGC 4388 and NGC 2110. Methods: we analysed the hard X-ray (20–300 keV) INTEGRAL spectrum in conjunction with archival XMM–Newton and NuSTAR data. Results: the X-ray spectrum of both sources is phenomenologically well described by an absorbed cut-off power law. In agreement with previous results, we find no evidence of a Compton reflection component in these sources. We obtain a high-energy cut-off of 200+75 −40 keV for NGC 4388 and 320+100 −60 keV for NGC 2110. A fit with a thermal Comptonisation model yields a coronal temperature of 80+40 −20 keV and 75+20 −15 keV, respectively, and an optical depth of approximately two, assuming a spherical geometry. The coronal temperature and luminosity of both sources are consistent with pair production that acts as a thermostat for the thermal plasma. These results emphasise the importance of good signal-to-noise X-ray data above 100 keV to probe the high-energy emission of AGNs. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | text |
| اللغة: | English |
| العلاقة: | https://eprints.soton.ac.uk/433823/1/The_coronal_temperature_of_NGC_4388_and_NGC_2110_measured_with_INTEGRAL.pdfTest; Ursini, F., Bassani, L., Malizia, A., Bazzano, A., Bird, A.J., Stephen, J.B. and Ubertini, P. (2019) The coronal temperature of NGC 4388 and NGC 2110 measured with INTEGRAL*. Astronomy & Astrophysics, 629, [A54]. (doi:10.1051/0004-6361/201936273 ). |
| الإتاحة: | https://eprints.soton.ac.uk/433823Test/ https://eprints.soton.ac.uk/433823/1/The_coronal_temperature_of_NGC_4388_and_NGC_2110_measured_with_INTEGRAL.pdfTest |
| حقوق: | accepted_manuscript |
| رقم الانضمام: | edsbas.A09760E2 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |