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Low mass companions searches using high dynamic range imaging
Published online by Cambridge University Press: 11 October 2004
Abstract
We present results obtained with different adaptive optics systems (ADONIS, PUEO, NAOS), in either imaging or coronagraphic modes, in the frame of several surveys aimed at searching for very low mass stars and substellar objects around nearby M dwarfs as well as in young closeby associations. For the M dwarfs of the solar neighborhood, we have obtained a very accurate mass-luminosity relation that we can compare to the prediction of recent stellar structure models. We also present multiplicity statistics of M dwarfs (binary fraction, period and mass ratio distribution), which are crucial constraints for stellar formation scenarii. We also discuss results obtained on two young closeby associations, MBM12 and Tucana-Horologium.
- Type
- Research Article
- Information
- European Astronomical Society Publications Series , Volume 12: Astronomy with High Contrast Imaging II , 2004 , pp. 319 - 336
- Copyright
- © EAS, EDP Sciences, 2004