SIMBAD references

2018A&A...619A..61L - Astronomy and Astrophysics, volume 619A, 61-61 (2018/11-1)

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. and NUNEZ N.E.

Abstract (from CDS):

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.

Abstract Copyright: © ESO 2018

Journal keyword(s): binaries: symbiotic - accretion, accretion disks - X-rays: binaries

Simbad objects: 3

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2018A&A...619A..61L and select 'bookmark this link' or equivalent in the popup menu


2020.02.26-03:13:07

© Université de Strasbourg/CNRS

    • Contact