The radii of M-dwarfs in the young open cluster NGC 2516

Details The radii of M-dwarfs in the young open cluster NGC 2516 The radii of M-dwarfs in the young open cluster NGC 2516

2009-08-10

arxiv.org/abs/0908.1406v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

Accepted for MNRAS letters (5 pages)

Scientific paper

Using a novel technique, which combines previously determined rotation periods with new spectroscopic determinations of projected rotation velocity, we have determined radii for fast rotating, low-mass (0.2-0.7 Msun) M-dwarfs in the young, solar-metallicity open cluster, NGC 2516. The mean radii are larger than model predictions at a given absolute I or K magnitude and also larger than the measured radii of magnetically inactive M-dwarfs; the difference increases from a few per cent, to 50 per cent for the lowest luminosity stars in our sample. We show that a simple two-temperature starspot model is broadly capable of explaining these observations, but requires spot coverage fractions of about 50 per cent in rapidly rotating M-dwarfs.

Affiliated with

Also associated with

No associations

Rating

The radii of M-dwarfs in the young open cluster NGC 2516 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 The radii of M-dwarfs in the young open cluster NGC 2516, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The radii of M-dwarfs in the young open cluster NGC 2516 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-164036