Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010head...11.4309s&link_type=abstract
American Astronomical Society, HEAD meeting #11, #43.09; Bulletin of the American Astronomical Society, Vol. 41, p.732
Astronomy and Astrophysics
Astronomy
Scientific paper
Views of activity in disk accretion in X-ray binaries have changed considerably in the last ten years with the availability high resolution X-ray spectrometers onboard the Chandra X-ray Observatory and XMM Newton. Todays account of observations of X-ray line absorption and emission is substantial in low-mass X-ray binaries and allows for novel insights in feedback processes in disk accretion. Signatures range from a variety of outflows -- Doppler shifted line absorptions from winds, Doppler shifted line emissions from jets -- to photo-ionized line emissions from various accretion disk coronal (ADC) geometries. Recent developments include evidence of X-ray heating of an extended ADC along the Z-pattern in Cyg X-2; recent dramatic spectral changes in the X-ray spectrum of Cir X-1; a highly variable and dynamic Ne edge and possibly red-shifted line emissions in the ultracompact binary 4U 0614+091. It is discussed how these features may be linked to jet activity.
Canizares Calude R.
Ji Liangliang
Kallman Tim R.
Nowak Maciej A.
Schulz Norbert S.
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