Henize 177-Slow Nova, Symbiotic Star, X-Ray Source?
نویسندگان
چکیده
منابع مشابه
Ultraluminous X-ray Source Correlations with Star-forming Regions
Maps of low-inclination nearby galaxies in Sloan Digitized Sky Survey u − g, g − r and r − i colors are used to determine whether Ultraluminous X-ray sources (ULXs) are predominantly associated with star-forming regions of their host galaxies. An empirical selection criterion is derived from colors of H ii regions in M81 and M101 that differentiates between the young, blue stellar component and...
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We have obtained intermediate resolution optical spectra of the black-hole candidate Nova Sco 1994 in June 1996, when the source was in an X-ray/optical active state (R ∼15.05). We measure the radial velocity curve of the secondary star and obtain a semi-amplitude of 279±10km s−1; a value which is 30 per cent larger than the value obtained when the source is in quiescence. Our large value for K...
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We describe Chandra High-Energy Transmission Grating Spectrometer observations of RT Cru, the first of a new sub-class of symbiotic stars that appear to contain white dwarfs (WDs) capable of producing hard X-ray emission out to greater than 50 keV. The production of such hard X-ray emission from the objects in this sub-class (which also includes CD −57 3057, T CrB, and CH Cyg) challenges our un...
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We have reanalysed the ASCA X-ray spectrum of the bright symbiotic star CH Cyg, which exhibits apparently distinct hard and soft X-ray components. Our analysis demonstrates that the soft X-ray emission can be interpreted as scattering of the hard X-ray component in a photo-ionised medium surrounding the white dwarf. This is in contrast to previous analyses in which the soft X-ray emission was f...
متن کاملThe X-ray Spectra of Symbiotic Stars
Symbiotic stars are thought to show distinct X-ray emission from the accreting object and from the colliding winds of the two stars. I show that the colliding wind component is unnecessary. Instead, the spectra can be interpreted as emission only from the compact object that is strongly absorbed by the partially-ionised wind of the red giant. There remains no evidence of any X-ray emission from...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1973
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/164.4.381