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Nature 433, 286-289 (20 January 2005) | doi:10.1038/nature03225;

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A dynamical calibration of the mass|[ndash]|luminosity relation at very low stellar masses and young ages

Mass is the most fundamental parameter of a star, yet it is also one of the most difficult to measure directly. In general, astronomers estimate stellar masses by determining the luminosity and using the |[lsquo]|mass–luminosity|[rsquo]| relationship, but this relationship has never been accurately calibrated for young, low-mass stars and brown dwarfs.

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