منابع مشابه
Ch Cygni. I. Observational Evidence for a Disk-jet Connection
We investigate the role of accretion in the production of jets in the symbiotic star CHCygni. Assuming that the rapid stochastic optical variations in CH Cygni come from the accretion disk, as in cataclysmic variables, we use changes in this flickering to diagnose the state of the disk in 1997. At that time, CH Cygni dropped to a very low optical state, and Karovska et al. report that a radio j...
متن کاملAn Apparent Hard X-ray Decline of CH Cygni
CH Cygni is a symbiotic star consisting of an M giant and an accreting white dwarf, which is known to be a highly variable X-ray source with a complex, two-component, spectra. Here we report on two Suzaku observations of CH Cyg, taken in 2006 January and May, during which the system was seen to be in a soft X-ray bright, hard X-ray faint state. Based on the extraordinary strength of the 6.4 keV...
متن کاملCh Cygni. Ii. Optical Flickering from an Unstable Disk
CHCygni began producing rapid, stochastic optical variations with the onset of symbiotic activity in 1963. We use changes in this flickering between 1997 and 2000 to diagnose the state of the accretion disk during this time. In the 1998 high state, the luminosity of the B-band flickering component was typically more than 20 times higher than in the 1997 and 2000 low states. Therefore, the physi...
متن کاملCh-ch-ch-ch-Changes
Change is not made without inconvenience, even from worse to better. Richard Hooker, as quoted in the preface of Samuel Johnson's A Dictionary of the English Language Oh, so they have internet on computers now! Homer Simpson It is with great pleasure that I announce the rebirth of the former print journal of the Canadian Geriatrics Society as a new online publication, the Canadian Geriatrics Jo...
متن کاملCH Cygni: TiO molecule as a probe of temperature variations in the atmosphere of the cool component
We report our determination of Tvib from band systems of TiO in the visible spectra of the symbiotic star CH Cygni during its 1987-89 quiescent phase as well as β And and 30 Her, which are taken as comparison stars. The problems usually met by attempting to perform quantitative analysis of the atmospheres of late M-type stars have been taken into account and discussed in detail. Assuming the LT...
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ژورنال
عنوان ژورنال: Publications of the Astronomical Society of the Pacific
سال: 1983
ISSN: 0004-6280,1538-3873
DOI: 10.1086/131182