التفاصيل البيبلوغرافية
| العنوان: |
Energy Dependent Intensity Variation of the Persistent X-ray Emission of Magnetars Observed with Suzaku |
| المؤلفون: |
Yujin E. Nakagawa, Teruaki Enoto, Ken Ebisawa |
| بيانات النشر: |
arXiv, 2018. |
| سنة النشر: |
2018 |
| مصطلحات موضوعية: |
Energy dependent, 010504 meteorology & atmospheric sciences, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, X-rays: stars, Astrophysics, Poisson distribution, Magnetar, 01 natural sciences, Root mean square, symbols.namesake, stars: magnetars, pulsars: general, 0103 physical sciences, Thermal, Variation (astronomy), 010303 astronomy & astrophysics, 0105 earth and related environmental sciences, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), X-ray, Astronomy and Astrophysics, Intensity (physics), Space and Planetary Science, symbols, Astrophysics - High Energy Astrophysical Phenomena |
| الوصف: |
Emission mechanism of the magnetars is still controversial while various observational and theoretical studies have been made. In order to investigate mechanisms of both the persistent X-ray emission and the burst emission of the magnetars, we have proposed a model that the persistent X-ray emission consists of numerous micro-bursts of various sizes. If this model is correct, intensity Root Mean Square (RMS) variations of the persistent emission exceed the values expected from the Poisson distribution. Using $Suzaku$ archive data of 11 magnetars (22 observations), the RMS intensity variations were calculated from 0.2 keV to 70 keV. As a result, we found significant excess RMS intensity variations from all the 11 magnetars. We suppose that numerous mircro-bursts constituting the persistent X-ray emission cause the observed variations, suggesting that the persistent X-ray emission and the burst emission have identical emission mechanisms. In addition, we found that the RMS intensity variations clearly increase toward higher energy bands for 4 magnetars (6 observations). The energy dependent RMS intensity variations imply that the soft thermal component and the hard X-ray component are emitted from different regions far apart from each other.
Comment: 21 pages, 4 figures, 2 tables, Accepted for publication in PASJ |
| DOI: |
10.48550/arxiv.1801.07407 |
| URL الوصول: |
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f8e70b67d36de8820391fff18ef51abf |
| Rights: |
OPEN |
| رقم الانضمام: |
edsair.doi.dedup.....f8e70b67d36de8820391fff18ef51abf |
| قاعدة البيانات: |
OpenAIRE |