Optical spectroscopy of Be/gamma-ray binaries
| العنوان: | Optical spectroscopy of Be/gamma-ray binaries |
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| المؤلفون: | K. A. Stoyanov, R. K. Zamanov, Josep Martí, Michael F. Bode, Georgi Latev, Y. M. Nikolov, Pedro L. Luque-Escamilla |
| سنة النشر: | 2016 |
| مصطلحات موضوعية: | Physics, Entire orbit, 010308 nuclear & particles physics, Disc size, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Compact star, Rotation, 01 natural sciences, Astrophysics - Solar and Stellar Astrophysics, Space and Planetary Science, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, Emission spectrum, Astrophysics::Earth and Planetary Astrophysics, Spectroscopy, 010303 astronomy & astrophysics, Solar and Stellar Astrophysics (astro-ph.SR), Astrophysics::Galaxy Astrophysics, QB |
| الوصف: | We report optical spectroscopic observations of the Be/gamma-ray binaries LSI+61303, MWC 148 and MWC 656. The peak separation and equivalent widths of prominent emission lines (H-alpha, H-beta, H-gamma, HeI, and FeII) are measured. We estimated the circumstellar disc size, compared it with separation between the components, and discussed the disc truncation. We find that in LSI+61303 the compact object comes into contact with the outer parts of the circumstellar disc at periastron, in MWC 148 the compact object goes deeply into the disc during the periastron passage, and in MWC 656 the black hole is accreting from the outer parts of the circumstellar disc along the entire orbit. The interstellar extinction was estimated using interstellar lines. The rotation of the mass donors appears to be similar to the rotation of the mass donors in Be/X-ray binaries. We suggest that X-ray/optical periodicity of about 1 day deserves to be searched for. 9 pages, accepted in A&A |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 0004-6361 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::17eaa10a5cb794f2510b0753af8c649f http://arxiv.org/abs/1605.05811 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....17eaa10a5cb794f2510b0753af8c649f |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 00046361 |
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