کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1769217 | 1020261 | 2006 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hard X-ray component in Sco X-1 spectrum: Synchrotron emission from a nano quasar
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علوم فضا و نجوم
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چکیده انگلیسی
Sco X-1 is a low mass X-ray binary system and with the recent observations of a resolved radio jet, the source has been included in the list of galactic microquasars. The observed spectral data in the 2-20Â keV energy band fits a thermal emission. Above 20Â keV, a hard tail has been reported on occasions. During our continuing balloon borne X-ray survey in the 20-200Â keV region using high sensitivity Large Area Scintillation counter Experiment, Sco X-1 was observed on two different occasions. Even though the total X-ray luminosity of the source was different, the spectral nature of the source did not show any variation. The presence of hard X-ray flux is unmistakable. We present the spectral and temporal data in the hard X-ray band and discuss the results in terms of geometrical characteristics of X-ray source and its observed temporal properties. We note that the jet activity is similar to the microquasars, however, the absence of the large magnitude abrupt changes in X-ray light curve compared to GRS1915Â +Â 105 suggest that the quasar-like behaviour is at a nano scale.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Advances in Space Research - Volume 37, Issue 11, 2006, Pages 2139-2145
Journal: Advances in Space Research - Volume 37, Issue 11, 2006, Pages 2139-2145
نویسندگان
R.K. Manchanda,