Dramatic change in the boundary layer in the symbiotic recurrent nova T Coronae Borealis
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 Aler...
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todo:paper_00046361_v619_n_p_Luna2023-10-03T14:01:21Z Dramatic change in the boundary layer in the symbiotic recurrent nova T Coronae Borealis Luna, G.J.M. Mukai, K. Sokoloski, J.L. Nelson, T. Kuin, P. Segreto, A. Cusumano, G. Jaque Arancibia, M. Nuñez, N.E. Accretion, accretion disks Binaries: symbiotic X-rays: binaries Boundary layers Accretion , accretion disks Accretion disks Association of variables Binaries: symbiotic Burst alert telescopes Disk instabilities Hard x-ray emission X-rays: Binaries X rays 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00046361_v619_n_p_Luna |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Accretion, accretion disks Binaries: symbiotic X-rays: binaries Boundary layers Accretion , accretion disks Accretion disks Association of variables Binaries: symbiotic Burst alert telescopes Disk instabilities Hard x-ray emission X-rays: Binaries X rays |
| spellingShingle |
Accretion, accretion disks Binaries: symbiotic X-rays: binaries Boundary layers Accretion , accretion disks Accretion disks Association of variables Binaries: symbiotic Burst alert telescopes Disk instabilities Hard x-ray emission X-rays: Binaries X rays Luna, G.J.M. Mukai, K. Sokoloski, J.L. Nelson, T. Kuin, P. Segreto, A. Cusumano, G. Jaque Arancibia, M. Nuñez, N.E. Dramatic change in the boundary layer in the symbiotic recurrent nova T Coronae Borealis |
| topic_facet |
Accretion, accretion disks Binaries: symbiotic X-rays: binaries Boundary layers Accretion , accretion disks Accretion disks Association of variables Binaries: symbiotic Burst alert telescopes Disk instabilities Hard x-ray emission X-rays: Binaries X rays |
| description |
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. |
| format |
JOUR |
| author |
Luna, G.J.M. Mukai, K. Sokoloski, J.L. Nelson, T. Kuin, P. Segreto, A. Cusumano, G. Jaque Arancibia, M. Nuñez, N.E. |
| author_facet |
Luna, G.J.M. Mukai, K. Sokoloski, J.L. Nelson, T. Kuin, P. Segreto, A. Cusumano, G. Jaque Arancibia, M. Nuñez, N.E. |
| author_sort |
Luna, G.J.M. |
| title |
Dramatic change in the boundary layer in the symbiotic recurrent nova T Coronae Borealis |
| title_short |
Dramatic change in the boundary layer in the symbiotic recurrent nova T Coronae Borealis |
| title_full |
Dramatic change in the boundary layer in the symbiotic recurrent nova T Coronae Borealis |
| title_fullStr |
Dramatic change in the boundary layer in the symbiotic recurrent nova T Coronae Borealis |
| title_full_unstemmed |
Dramatic change in the boundary layer in the symbiotic recurrent nova T Coronae Borealis |
| title_sort |
dramatic change in the boundary layer in the symbiotic recurrent nova t coronae borealis |
| url |
http://hdl.handle.net/20.500.12110/paper_00046361_v619_n_p_Luna |
| work_keys_str_mv |
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| _version_ |
1782029004227739648 |