التفاصيل البيبلوغرافية
| العنوان: |
Dramatic change in the boundary layer in the symbiotic recurrent nova T Coronae Borealis |
| المؤلفون: |
Luna, G.J.M., Mukai, K., Sokoloski, J.L., Nelson, T., Kuin, P., Segreto, A., Cusumano, G., Jaque Arancibia, M., Nuñez, N.E. |
| المجموعة: |
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) |
| مصطلحات موضوعية: |
Accretion, accretion disks, Binaries: symbiotic, X-rays: binaries, Boundary layers, Association of variables, Burst alert telescopes, Disk instabilities, Hard x-ray emission, X rays |
| الوصف: |
A sudden increase in the rate at which material reaches the most internal part of an accretion disk, i.e., the boundary layer, can change its structure dramatically. We have witnessed such a change for the first time in the symbiotic recurrent nova T CrB. Our analysis of XMM-Newton, Swift Burst Alert Telescope (BAT)/X-Ray Telescope (XRT)/UltraViolet Optical Telescope (UVOT), and the American Association of Variable Stars Observers (AAVSO) V- and B-band data indicates that during an optical brightening event that started in early 2014 (ΔV ≈ 1.5) the following occurred: (i) the hard X-ray emission as seen with BAT almost vanished; (ii) the XRT X-ray flux decreased significantly, while the optical flux remained high; (iii) the UV flux increased by at least a factor of 40 over the quiescent value; and (iv) the X-ray spectrum became much softer and a bright, new blackbody-like component appeared. We suggest that the optical brightening event, which could be a similar event to that observed about 8 years before the most recent thermonuclear outburst in 1946, is due to a disk instability. © ESO 2018. |
| نوع الوثيقة: |
journal/newspaper |
| اللغة: |
unknown |
| Relation: |
http://hdl.handle.net/20.500.12110/paper_00046361_v619_n_p_Luna |
| الاتاحة: |
https://hdl.handle.net/20.500.12110/paper_00046361_v619_n_p_Luna |
| Rights: |
info:eu-repo/semantics/openAccess ; http://creativecommons.org/licenses/by/2.5/ar |
| رقم الانضمام: |
edsbas.4455C0E0 |
| قاعدة البيانات: |
BASE |