Fornax - The Companion of the Milky Way and the Question of its Standard Motion
Miroslaw Zabierowski
Keywords: Fornax, Milky Way, standard motion, galaxies, elliptical motion
The past encounter of Fornax and its perigalaction had as consequence the changing of the Fornax structure.
- According to Hodge (1966) restructuralization of the Fornax density profiles proves that galaxies go round in an elliptical (Keplerian) motion. I am afraid that this vision of the Keplerian motion had been wrongly - but widely! accepted, particularly at the decades when the short scale of the Universe age (H = 100 kms-1Mpc-1) was generally submitted.
- The aim of the Keplerian-like conceptualization is to obtain the agreement between the computed tidally limited radius rt and the observed tidally limited radius rl of the Fornax system of star collection. Very much conflict is observed because rt = 7.0 kpc is two times greater than rl = 3.1 kpc. This noticeable divergence had been discussed by Hodge and he claimed that the observed radius of the Fornax system was the tidal radius imposed at perigalaction meeting. The new value of rt is much reduce, just by the factor 2.3.
