Far-UV FUSE Spectra of Peculiar Magnetic Cataclysmic Variables
نویسندگان
چکیده
منابع مشابه
Far - ultraviolet Spectroscopy of Magnetic Cataclysmic Variables
We have obtained HST/STIS data for a total of eleven polars as part of a program aimed to compile a homogeneous database of high-quality far-ultraviolet (FUV) spectra for a large number of cataclysmic variables (CVs). Of the eleven polars, eight were found in a state of low accretion activity (V347Pav, VVPup, V834Cen, BLHyi, MRSer, STLMi, RXJ1554.2+2721 and V895Cen) and three in a state of high...
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HST and FUSE have provided high signal-to-noise, high-resolution spectra of a variety of cataclysmic variables and have allowed a detailed characterization of FUV emission sources in both high and low states. Here, I describe how this has advanced our understanding of non-magnetic CVs and the substantial interpretive challenges still posed by the observations. In the high state, the FUV spectra...
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We present Far Ultraviolet Spectroscopic Explorer observations of the magnetic cataclysmic variable V405 Aurigae. Together with four other DQ Her type binaries, V405 Aur forms a small subclass of intermediate polars which are likely to evolve into low magnetic field strength polars, similar to AM Her. Our coadded FUSE spectrum exhibits broad O VI and C III emission-lines as well as a narrow O V...
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Composite spectra derived from HST observations of moderate redshift (z ∼ 1) quasars show that the peak of the spectral energy distribution is at ∼1000 Å, and that the ionizing continuum falls off smoothly to shorter wavelengths as fν ∼ ν −1.8. HUT and FUSE observations of nearby AGN (e.g., 3C 273) show similar results. FUSE spectra reveal a wealth of detail in the 912–1200 Å spectral range, in...
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Using the Chandra HETG spectrum of EX Hya as an example, we discuss some of the plasma diagnostics available in high-resolution X-ray spectra of magnetic cataclysmic variables. Specifically, for conditions appropriate to collisional ionization equilibrium plasmas, we discuss the temperature dependence of the Hto He-like line intensity ratios and the density and photoexcitation dependence of the...
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ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 2004
ISSN: 0252-9211
DOI: 10.1017/s0252921100001974