The applications of the MHD Alfvén wave oscillation model for kHz quasi-periodic oscillations
| العنوان: | The applications of the MHD Alfvén wave oscillation model for kHz quasi-periodic oscillations |
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| المؤلفون: | Chuan-Peng Zhang, Yinghe Zhao, Li-Ming Song, H. X. Yin, Hsiang-Kuang Chang |
| المصدر: | Astronomische Nachrichten. 328:491-498 |
| بيانات النشر: | Wiley, 2007. |
| سنة النشر: | 2007 |
| مصطلحات موضوعية: | Physics, Alfvén wave, Neutron star, Stellar mass, Space and Planetary Science, Millisecond pulsar, Oscillation, Nonlinear resonance, Astronomy and Astrophysics, Astrophysics, Radius, Magnetohydrodynamics |
| الوصف: | In this paper, we improve the previous work on the MHD Alfven wave oscillation model for the neutron star (NS) kHz quasi-periodic oscillations (QPOs), and compare the model with the updated twin kHz QPO data. For the 17 NS X-ray sources with the simultaneously detected twin kHz QPO frequencies, the stellar mass M and radius R constraints are given by means of the derived parameter A in the model, which is associated with the averaged mass density of the star as 〈ρ 〉 = 3M /(4πR3) ≃ 2.4 × 1014 (A /0.7)2 g/cm3, and we also compare the M -R constraints with the stellar equations of state. Moreover, we also discuss the theoretical maximum kHz QPO frequency and maximum twin peak separation, and some expectations on SAX J1808.4–3658 are mentioned, such as its highest kHz QPO frequency ∼ 870 Hz, which is about 1.4–1.5 times less than those of the other known kHz QPO sources. The estimated magnetic fields for both Z sources (about Eddington accretion rate ) and Atoll sources (∼ 1% ) are approximately ∼109 G and ∼108 G, respectively. (© 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) |
| تدمد: | 1521-3994 0004-6337 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_________::7c795da890172d5e8b74d3d03e7e5bb2Test https://doi.org/10.1002/asna.200610750Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi...........7c795da890172d5e8b74d3d03e7e5bb2 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15213994 00046337 |
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