Yarkovsky–O'Keefe–Radzievskii–Paddack effect

The Yarkovsky - O'Keefe - Radzievskii - Paddack effect shortened, also called YORP effect is a gradual change of the rotational state of small bodies (eg asteroids ) under the influence of solar radiation.

Description

As the effect is achieved of Jarkowski YORP effect in that thermal radiation is emitted spatially anisotropic, whereby a small torque. Wherein the spatial position of the axis of rotation can be changed, but will be braked or accelerated, the existing rotary motion.

The YORP effect has been demonstrated on the asteroid ( 54509 ) YORP and (1862 ) Apollo by the teams led by Stephen Lowry ( Queens University Belfast ) and Mikko Kaasalainen ( University of Helsinki). The asteroid P/2013 R3 was moved by the YORP effect in such a rapid rotation that he disintegrated by the centrifugal forces.

The term YORP effect in 2000 by David P. Rubincam on work done by Ivan O. Jarkowski was introduced ( in the English speaking transcribed as Yarkovsky ), John A. O'Keefe, Vladimir V. Radsiewski ( Radzievskii ) and Stephen J. Paddack.

Dust particles, which are asymmetrically shaped, can also get into rotation by light in air. Some particles may have a shape that the light based on the rotation causes directional motion in the air. Although these photopheresis wearing only a very small proportion of dust particles upward, but significant acts in opposition to the disengagement by gravity and helps the presence of dust particles and Mikroorganisman up into the stratosphere to explain. Publications to photopheresis there are at least since 1932, the Linz experimental physicist Hans Rohatschek published 1955-1984 to do so.

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