Synchronous

  • the synchronous are the loci of the grains of cometary dust (of varied sizes) which left the core at the same date.

  • the syndynes (or syndynames ) are the loci of the grains of cometary dust of the same size and which left the core on different dates.

The unit formed by the synchronous ones and the syndynes translate the shape of the tail of dust and make it possible to envisage the evolution of it.

It is with Freidriech Bessel, astronomer German (1784 - 1846), whom one must have had the first the idea of a repelling power which can generate the tail of a Comet (in 1835).

These ideas were taken up by the Russian astronomer Theodor Bredichin and allowed him to interpret correctly various comets, including that of 1744 and the Pons-Brooks comet which appeared in 1884.

The theory of synchronous-syndynes was then taken again and developed in 1967 by Michael FINSON and Ronald PROBSTEIN (Massachusetts Institute off Technology).

This theory was applied successfully by these last authors to explain the particular shape of the tail of the Arend-Roland comet (1957) and his anti-tail.

External bonds

  • Article of Finson and Probstein, in The Astrophysical Newspaper

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