Detection of a large Be circumstellar disk during X-ray quiescence of XTEJ1946+274

We present a multi-wavelength study of the Be/X-ray binary system XTE J1946 + 274 with the main goal of better characterizing its behavior during X-ray quiescence. We also aim to shed light on the possible mechanisms which trigger the X-ray activity for this source. XTEJ1946 + 274 was observed by Ch...

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Bibliographic Details
Published in:Astronomy and astrophysics (Berlin) 2015-10, Vol.582, p.1-9
Main Authors: Arabaci, M Ozbey, Camero-Arranz, A, Zurita, C, Gutierrez-Soto, J, Nespoli, E, Suso, J, Kiaeerad, F, Garcia-Rojas, J, Kiziloglu, U
Format: Article
Language:English
Subjects:
Accretion disks
Astronomy
Binary stars
Luminosity
Photometry
Spectra
X-ray sources
X-rays
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Summary:We present a multi-wavelength study of the Be/X-ray binary system XTE J1946 + 274 with the main goal of better characterizing its behavior during X-ray quiescence. We also aim to shed light on the possible mechanisms which trigger the X-ray activity for this source. XTEJ1946 + 274 was observed by Chandra-ACIS during quiescence in 2013 March 12. We have performed spectral and photometric temporal analysis in order to investigate the quiescent state and transient behavior of this binary system. Our optical study revealed that a long mass ejection event from the Be star took place in 2006, lasting for about seven years, and another one is currently ongoing. The observed X-ray luminosity during quiescent periods was close to that of expected in supersonic propeller regimen.
ISSN:0004-6361
1432-0746
DOI:10.1051/0004-6361/201425488