||Creation of Neutral Disks During Outbursts of Symbiotic Binaries
||447, Evolution of Compact Binaries
||Cariková, Z.; Skopal, A.
||Multiwavelength modelling of the spectral energy distribution
of symbiotic binaries suggests that a neutral disc-like
zone is created around the hot star near the orbital plane
during active phases.
Presumably, this is connected with the enhanced wind from the
active hot star.
To test this idea, we applied the wind compression model to
active hot stars in symbiotic binaries, within which
the wind particles are compressed more to the equatorial plane
due to a fast rotation of the hot star.
Accordingly, we calculated the ionisation structure for such
compressed wind and ionising photons from the hot star.
We found that the hot star wind, enhanced during active phases
to ∼ (10–7– 10–6) M☉ yr–1, and the
rotational velocity of 100 – 350 km s-1 at the star's equator
lead to formation of a neutral disc-shaped zone.
The presence of such discs is transient, being connected
with the active phases of symbiotic binaries.
During quiescent phases, such neutral discs cannot be
created, because of insufficient mass loss rate.