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Issue A&A
Volume 464, Number 1, March II 2007
Page(s) 127 - 134
Section Astrophysical processes
DOI http://dx.doi.org/10.1051/0004-6361:20066132



A&A 464, 127-134 (2007)
DOI: 10.1051/0004-6361:20066132

Poynting-Robertson effect and perihelion motion

J. Klacka1, M. Kocifaj2, P. Pástor1, and J. Petrzala1

1  Department of Astronomy, Physics of the Earth, and Meteorology, Faculty of Mathematics, Physics and Informatics, Comenius University, Mlynská dolina, 842 48 Bratislava, Slovak Republic
    e-mail: [klacka;pavol.pastor]@fmph.uniba.sk
2  Astronomical Institute, Slovak Academy of Sciences, Dúbravská cesta 9, 845 04 Bratislava, Slovak Republic
    e-mail: astromir@savba.sk

(Received 28 July 2006 / Accepted 17 October 2006)

Abstract
The effect of stellar electromagnetic radiation on the motion of homogeneous spherical dust particles, the Poynting-Robertson (P-R) effect, is investigated. The effect already produces a shift of pericenter/perihelion in the accuracy to the first order in  $\vec{v} / c$, where $\vec{v}$ is velocity of the particle with respect to the source of radiation and c is the speed of light. The advancement of pericenter occurs due to the fact that the P-R effect depends on radiation pressure efficiency factor  $Q'_{\rm pr}$, which is a function of optical properties of the particle. The particle orbiting a star moves in various distances from the star and the particle optical properties may vary with the distance, as they are functions of temperature.


Key words: scattering -- solar system: general -- interplanetary medium



© ESO 2007


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