SIMBAD references

2003A&A...397L...5S - Astronomy and Astrophysics, volume 397, L5-8 (2003/1-3)

First radius measurements of very low mass stars with the VLTI.

SEGRANSAN D., KERVELLA P., FORVEILLE T. and QUELOZ D.

Abstract (from CDS):

We present 4 very low mass stars radii measured with the VLTI using the 2.2µm VINCI test instrument. The observations were carried out during the commissioning of the 104-meter-baseline with two 8-meter-telescopes. We measure angular diameters of 0.7-1.5mas with accuracies of 0.04-0.11mas, and for spectral type ranging from M0V to M5.5V. We determine an empirical mass-radius relation for M dwarfs based on all available radius measurements. The observed relation agrees well with theoretical models at the present accuracy level, with possible discrepancy around 0.5-0.8M that needs to be confirmed. In the near future, dozens of M dwarfs radii will be measured with 0.1-1% accuracy, with the VLTI, thanks to the improvements expected from the near infrared instrument AMBER. This will bring strong observational constraints on both atmosphere and interior physics.

Abstract Copyright:

Journal keyword(s): stars: low-mass, brown dwarfs - stars: fundamental parameters - techniques: interferometric

Simbad objects: 17

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2020.11.29-19:30:17

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