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Many astrophysical sources, e.g., cataclysmic variables, X-ray binaries,active galactic nuclei, exhibit a wind outflow, when they reveal a multicolorblackbody spectrum, hence harboring a geometrically thin Keplerian accretiondisk. Unlike an advective disk, in the thin disk, the physical environment,like, emission line, external heating, is expected to play a key role to drivethe wind outflow. We show the wind outflow in a thin disk attributing a diskirradiation effect, probably from the inner to outer disks. We solve the set ofsteady, axisymmetric disk model equations in cylindrical coordinates along thevertical direction for a given launching radius $(r)$ from the midplane,introducing irradiation as a parameter. We obtain an acceleration solution, fora finite irradiation in the presence of a fixed but tiny initial verticalvelocity (hence thin disk properties practically do not alter) at the midplane,upto a maximum height ($z^{max}$). We find that wind outflow mainly occurs fromthe outer region of the disk and its density decreases with increasinglaunching radius, and for a given launching radius with increasing ejectionheight. Wind power decreases with increasing ejection height. For $z^{max} <2r$, wind outflow is ejected tangentially (or parallel to the disk midplane) inall directions with the fluid speed same as the azimuthal speed. This confirmsmainly, for low mass X-ray binaries, (a) wind outflow should be preferentiallyobserved in high-inclination sources, (b) the expectation of red and blueshifted absorption lines.

Thermal irradiation induced wind outflow in a geometrically thin accretion disk: A hydrodynamic study