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| Paper: |
Thermonuclear Explosions on the Surface of White Dwarfs: a Multi-Wavelength View |
| Volume: |
536, The Twelfth Pacific Rim Conference on Stellar Astrophysics |
| Page: |
131 |
| Authors: |
Skopal, A. |
| Abstract: |
Symbiotic stars (SySts) and cataclysmic variables (CVs) are interacting binary systems, whose orbital periods are extremely different, but have the same type of accretor - a white dwarf (WD). As a result of accretion, both systems experience an unexpected ignition (or sudden increase) of nuclear hydrogen-to-helium fusion at the surface of the WD, an outburst that we indicate as a brightness increase in the optical by ≈1 to 15 mag. The released energy blows out the outer layer of the material in the form of an optically thick wind, is transferred through it, and thus redistributes into the entire electromagnetic spectrum depending on the time evolution of the eruption. In this contribution, I present examples of multi-wavelength modeling of the spectral energy distribution observed for systems selected from both groups and for very different stages of their outburst. This method makes it possible to determine physical parameters of the individual components of radiation in their spectra, as well as to estimate the ionization and geometric structure of the exploding object. Both systems develop a strong nebular continuum produced by ionized ejected material during their explosions. |
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