Dataciencia

Colección SciELO Chile

Dramatic change in the boundary layer in the symbiotic recurrent nova T Coronae Borealis

Indexado

WoS	WOS:000449724800001
Scopus	SCOPUS_ID:85056506893

DOI

10.1051/0004-6361/201833747

Año

2018

Tipo

artículo de investigación

Citas Totales

Autores Afiliación Chile

Instituciones Chile

% Participación
Internacional

Autores
Afiliación Extranjera

Instituciones
Extranjeras

Abstract

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 (AV 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.

Revista

Revista	ISSN
Astronomy & Astrophysics	0004-6361

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Disciplinas de Investigación

WOS
Astronomy & Astrophysics

Scopus
Sin Disciplinas

SciELO
Sin Disciplinas

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Publicaciones WoS (Ediciones: ISSHP, ISTP, AHCI, SSCI, SCI), Scopus, SciELO Chile.

Colaboración Institucional

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Autores - Afiliación

Ord.	Autor	Género	Institución - País
1	Luna, G. J. M.	Hombre	UNIV BUENOS AIRES - Argentina Univ Nacl Arturo Jauretche - Argentina Universidad de Buenos Aires - Argentina Universidad Nacional Arturo Jauretche - Argentina
2	Mukai, Koji	Hombre	NASA - Estados Unidos Univ Maryland Baltimore Cty - Estados Unidos NASA Goddard Space Flight Center - Estados Unidos University of Maryland, Baltimore - Estados Unidos University of Maryland, Baltimore County (UMBC) - Estados Unidos
3	Sokoloski, Jennifer L.	Mujer	Columbia Univ - Estados Unidos Columbia University in the City of New York - Estados Unidos Columbia University - Estados Unidos
4	Nelson, Thomas	Hombre	Univ Pittsburgh - Estados Unidos University of Pittsburgh - Estados Unidos
5	Kuin, N. P. M.	-	Univ Coll London - Reino Unido UCL - Reino Unido UCL Mullard Space Science Laboratory - Reino Unido
6	Segreto, A.	-	Istituto Nazionale di Astrofisica - Italia INAF Istituto di Astrofisica Spaziale e Fisica Cosmica di Palermo - Italia
7	Cusumano, G.	-	Istituto Nazionale di Astrofisica - Italia INAF Istituto di Astrofisica Spaziale e Fisica Cosmica di Palermo - Italia
8	Arancibia, Marcelo Jaque	Hombre	Universidad de la Serena - Chile Comision Nacional de Investigacion Cientifica y Tecnologica - Argentina Instituto de Ciencias Astronómicas de la Tierra y Del Espacio (ICATE-CONICET) - Argentina Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) - Argentina
9	Nunez, Natalia E.	Mujer	Comision Nacional de Investigacion Cientifica y Tecnologica - Argentina Instituto de Ciencias Astronómicas de la Tierra y Del Espacio (ICATE-CONICET) - Argentina Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) - Argentina

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Financiamiento

Fuente
NASA
National Aeronautics and Space Administration
ESA Member States
Ecological Society of America
grant PIP-CONICET/2011
CIC-CONICET

Muestra la fuente de financiamiento declarada en la publicación.

Agradecimientos

Agradecimiento
We acknowledge the anonymous referee for the useful comments that helped to improve the quality of this manuscript. This work is based on observations obtained with XMM-Newton an ESA science mission with instruments and contributions directly funded by ESA Member States and NASA. We thank the entire Swift team for accepting and planning our multiple Target-of-Opportunity requests. We thank Norbert Schartel for approving the XMM-Newton DDT request. We acknowledge with thanks the variable star observations from the AAVSO International Database contributed by observers worldwide and used in this research. We thank Ulisse Munari for the helpful discussions about the current super-active state. GJML and NEN are members of the CIC-CONICET (Argentina) and acknowledge support from grant ANPCYT-PICT 0478/14. GJML also acknowledges support from grant PIP-CONICET/2011 #D4598. JLS acknowledges support from NASA grants NNX15AF19G and NNX17AC45G.
Acknowledgements. We acknowledge the anonymous referee for the useful comments that helped to improve the quality of this manuscript. This work is based on observations obtained with XMM-Newton an ESA science mission with instruments and contributions directly funded by ESA Member States and NASA. We thank the entire Swift team for accepting and planning our multiple Target-of-Opportunity requests. We thank Norbert Schartel for approving the XMM-Newton DDT request. We acknowledge with thanks the variable star observations from the AAVSO International Database contributed by observers worldwide and used in this research. We thank Ulisse Munari for the helpful discussions about the current super-active state. GJML and NEN are members of the CIC-CONICET (Argentina) and acknowledge support from grant ANPCYT-PICT 0478/14. GJML also acknowledges support from grant PIP-CONICET/2011 #D4598. JLS acknowledges support from NASA grants NNX15AF19G and NNX17AC45G.

Agradecimiento

We acknowledge the anonymous referee for the useful comments that helped to improve the quality of this manuscript. This work is based on observations obtained with XMM-Newton an ESA science mission with instruments and contributions directly funded by ESA Member States and NASA. We thank the entire Swift team for accepting and planning our multiple Target-of-Opportunity requests. We thank Norbert Schartel for approving the XMM-Newton DDT request. We acknowledge with thanks the variable star observations from the AAVSO International Database contributed by observers worldwide and used in this research. We thank Ulisse Munari for the helpful discussions about the current super-active state. GJML and NEN are members of the CIC-CONICET (Argentina) and acknowledge support from grant ANPCYT-PICT 0478/14. GJML also acknowledges support from grant PIP-CONICET/2011 #D4598. JLS acknowledges support from NASA grants NNX15AF19G and NNX17AC45G.

Acknowledgements. We acknowledge the anonymous referee for the useful comments that helped to improve the quality of this manuscript. This work is based on observations obtained with XMM-Newton an ESA science mission with instruments and contributions directly funded by ESA Member States and NASA. We thank the entire Swift team for accepting and planning our multiple Target-of-Opportunity requests. We thank Norbert Schartel for approving the XMM-Newton DDT request. We acknowledge with thanks the variable star observations from the AAVSO International Database contributed by observers worldwide and used in this research. We thank Ulisse Munari for the helpful discussions about the current super-active state. GJML and NEN are members of the CIC-CONICET (Argentina) and acknowledge support from grant ANPCYT-PICT 0478/14. GJML also acknowledges support from grant PIP-CONICET/2011 #D4598. JLS acknowledges support from NASA grants NNX15AF19G and NNX17AC45G.