The Eclipsing Supersoft X‐Ray Binary CAL 87
نویسندگان
چکیده
منابع مشابه
The Eclipsing Supersoft X-ray Binary Cal 87
We present and discuss 25 spectra obtained in November 1996, covering all phases of the CAL 87 binary system. These spectra are superior both in signal-to-noise and wavelength coverage to previously published data so that additional spectral features can be measured. Photometry obtained on the same nights is used to confirm the ephemeris and to compare with light curves from previous years. Ana...
متن کاملVisual light from the eclipsing supersoft X - ray source CAL 87
We calculate the visual light curve of CAL 87 based on the assumption that an accreting steadily burningwhite dwarf irradiates the accretion disk and the secondary star, as suggested by van den Heuvel et al. (1992). We find a reasonable fit including the following sources of visual light: 1. the secondary star where the energy from irradiation is spread out over the surface, 2. the accretion di...
متن کاملX-ray Pulsations in the Supersoft X-ray Binary Cal 83
Received ; accepted – 2 – ABSTRACT Chandra and XMM-Newton X-ray data reveal that the supersoft X-ray binary CAL 83 exhibits 38.4-minute pulsations at some epochs. These X-ray variations are similar to those found in some novae and are likely to be caused by nonradial pulsations of the white dwarf. This is the first detection of pulsations in a classical supersoft X-ray binary.
متن کاملar X iv : a st ro - p h / 98 04 22 9 v 1 2 2 A pr 1 99 8 THE ECLIPSING SUPERSOFT X - RAY BINARY CAL 87
We present and discuss 25 spectra obtained in November 1996, covering all phases of the CAL 87 binary system. These spectra are superior both in signal-to-noise and wavelength coverage to previously published data so that additional spectral features can be measured. Photometry obtained on the same nights is used to confirm the ephemeris and to compare with light curves from previous years. Ana...
متن کاملV5116 Sgr, an Eclipsing Supersoft Post-outburst Nova?
months after the optical outburst. The X-ray spectrum shows that the nova had evolved to a pure supersoft X-ray source, with no significant emission at energies above 1 keV. The X-ray light-curve shows abrupt decreases and increases of the flux by a factor ∼ 8. It is consistent with a periodicity of 2.97 h, the orbital period suggested by Dobrotka et al. (2007), although the observation lasted ...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 1998
ISSN: 0004-637X,1538-4357
DOI: 10.1086/305895