Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2009-06-02
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
12 pages. Accepted on 16/05/2009 (A&A)
Scientific paper
We measured the radii of 7 low and very low-mass stars using long baseline interferometry with the VLTI interferometer and its VINCI and AMBER near-infrared recombiners. We use these new data, together with literature measurements, to examine the luminosity- radius and mass-radius relations for K and M dwarfs. The precision of the new interferometric radii now competes with what can be obtained for double-lined eclipsing binaries. Interferometry provides access to much less active stars, as well as to stars with much better measured distances and luminosities, and therefore complements the information obtained from eclipsing systems. The radii of magnetically quiet late-K to M dwarfs match the predictions of stellar evolution models very well, providing direct confirmation that magnetic activity explains the discrepancy that was recently found for magnetically active eclipsing systems. The radii of the early K dwarfs are well reproduced for a mixing length parameter that approaches the solar value, as qualitatively expected.
Beuzit Jean Luc
Delfosse Xavier
Demory Brice-Olivier
Folco E. di
Forveille Thierry
No associations
LandOfFree
Mass-radius relation of low and very low-mass stars revisited with the VLTI does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Mass-radius relation of low and very low-mass stars revisited with the VLTI, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mass-radius relation of low and very low-mass stars revisited with the VLTI will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-193329