تقرير
The orbit of the gamma-ray binary 1FGL J1018.6-5856
| العنوان: | The orbit of the gamma-ray binary 1FGL J1018.6-5856 |
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| المؤلفون: | Monageng, Itumeleng, McBride, Vanessa, Townsend, Lee, Kniazev, Alexei, Mohamed, Shazrene, Böttcher, Markus |
| سنة النشر: | 2017 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Solar and Stellar Astrophysics |
| الوصف: | Gamma-ray binaries are a small subclass of the high mass X-ray binary population which exhibit emission across the whole electromagnetic spectrum. We present radial velocities of 1FGL J1018.6$-$5856 based on observations obtained with the Southern African Large Telescope (SALT). We combine our measurements with those published in the literature to get a broad phase coverage. The mass function obtained supports a neutron star compact object, although a black hole mass is possible for very low inclination angles. The improved phase coverage allows constraints to be placed on the orbital eccentricity (e = 0.31 $\pm$ 0.16), which agrees with estimates from high-energy data. Comment: 6 pages, 5 figures, accepted for publication in ApJ |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.3847/1538-4357/aa87b7 |
| URL الوصول: | http://arxiv.org/abs/1708.07886 |
| رقم الأكسشن: | edsarx.1708.07886 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.3847/1538-4357/aa87b7 |
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