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- W2071904760 abstract "Ten spectra of AM Herculis were obtained with the SWP instrument of the IUE over 2.5 orbital periods during a faint state in 1992. Significant periodic variability was seen in the UV flux and spectra. On the same day, UBVRI photometry was obtained at the 1.25 meter optical telescope of the Crimean Astrophysical Observatory. The UV spectra and optical photometry at the same orbital phase were fit to spectral models to determine the temperature. When AM Her was faint a single cool (T~20,000 K) model fit the data. At the bright phase, a second, hotter component covering a small portion of the white dwarf surface improved the fit to both the continuum shapes and Lyα profiles of the spectra. This component could be the high-state hot spot cooling slowly after the accretion stops, or it might be heated by continuing accretion at a low rate. The high temperature (T~ 50,000 K) three weeks after the transition to the low state and the modest deviation from a smooth UV light curve lead us to favor the model of continued accretion at a low accretion rate." @default.
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- W2071904760 date "1995-01-01" @default.
- W2071904760 modified "2023-09-26" @default.
- W2071904760 title "IUE and Optical Observations of AM Herculis in its Low State" @default.
- W2071904760 doi "https://doi.org/10.1007/978-94-011-0335-0_69" @default.
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