Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-10-11
Astronomy and Astrophysics
Astrophysics
15th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun ASP Conference Series, proceedings of the conference held
Scientific paper
10.1063/1.3099266
The young sigma Orionis cluster in the Orion Belt is an incomparable site for studying the formation and evolution of high-mass, solar-like, and low-mass stars, brown dwarfs, and substellar objects below the deuterium burning mass limit. The first version of the Mayrit catalogue was a thorough data compilation of cluster members and candidates, which is regularly used by many authors of different disciplines. I show two new applications of the catalogue and advance preliminar results on very wide binarity and the initial mass function from 18 to 0.035 Msol in sigma Orionis. The making-up of a new version of the Mayrit catalogue with additional useful data is in progress.
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