Bibcode
Abad, C.; Vieira, K.; Bongiovanni, A.; Romero, L.; Vicente, B.
Bibliographical reference
Astronomy and Astrophysics, v.397, p.345-351 (2003)
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1
2003
Journal
Citations
11
Refereed citations
8
Description
We present a way of handling and interpreting stellar proper motions, in
which the idea of substituting them by great circles, proposed by
Herschel in 1783, allows us to take the entire celestial sphere as a
field of application, making possible the study of dense and extensive
stellar zones. A suitable mathematical processing of data together with
Herschel's method make up a good tool in order to search for and detect
associations, clusters, systematic patterns of motion and to go deeper
in the local galactic kinematic. In this paper, we explain our vision of
Herschel's method, illustrating it with some practical examples. The
particular case of solar motion is developed in a specific and complete
way, using the whole Hipparcos catalogue, Herschel's method and our own
mathematical tool, originally designed to determine systematic trends in
plates or between catalogues. The solar apex and velocity obtained here
are expressed as a continuous function, depending on the distribution of
the stellar spectral types.