Showing papers by "Margarita Karovska published in 2007"
TL;DR: In this paper, the authors reported detection of multiple component structures in a Chandra X-ray image obtained in 2001 March of the nearby symbiotic interacting binary system CH Cyg, including a compact central source, an arclike structure or a loop extending to 1.5'' (400 AU), and possibly a newly formed jet extending to ~150 AU from the central source.
Abstract: In this paper we report detection of multiple component structures in a Chandra X-ray image obtained in 2001 March of the nearby symbiotic interacting binary system CH Cyg. These components include a compact central source, an arclike structure or a loop extending to 1.5'' (400 AU) from the central source associated with the 1997 jet activity, and possibly a newly formed jet extending to ~150 AU from the central source. The structures are also visible in VLA and HST images obtained close in time to the Chandra observations. The emission from the loop is consistent with optically thin thermal X-ray emission originating from a shock resulting from interaction of the jet ejecta with the dense circumbinary material. The emission from the central source originates within <50 AU region, and is likely associated with the accretion disk around the white dwarf. CH Cyg is only the second symbiotic system with jet activity detected at X-ray wavelengths, and the Chandra high angular resolution image, combined with the VLA and HST images, provides the closest view of the region of jet formation and interaction with the circumbinary material in a symbiotic binary.
64 citations
TL;DR: An overview of Chandra X-ray observations of neutron stars can be found in this article, where the authors present an admittedly biased and overly brief review of these observations, highlighting some new discoveries made possible by the Observatory's unique capabilities, including the analysis of recent multiwavelength observations of the putative pulsar and its pulsar-wind nebula in the IC443 SNR.
Abstract: We present an overview of Chandra X-ray Observatory observations of neutron stars. The outstanding spatial and spectral resolution of this great observatory have allowed for observations of unprecedented clarity and accuracy. Many of these observations have provided new insights into neutron star physics. We present an admittedly biased and overly brief review of these observations, highlighting some new discoveries made possible by the Observatory’s unique capabilities. This includes our analysis of recent multiwavelength observations of the putative pulsar and its pulsar-wind nebula in the IC443 SNR.
16 citations