The Chromospheric Activity, Age, Metallicty and Space Motions of 36 Wide Binaries

Details The Chromospheric Activity, Age, Metallicty and Space Motions of 36 Wide Binaries The Chromospheric Activity, Age, Metallicty and Space Motions of 36 Wide Binaries

2011-01-17

arxiv.org/abs/1101.3257v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

28 pages, 6 figures, accepted for publication in AJ

Scientific paper

We present the chromospheric activity (CA) levels, metallicities and full space motions for 41 F, G, K and M dwarf stars in 36 wide binary systems. Thirty-one of the binaries, contain a white dwarf component. In such binaries the total age can be estimated by adding the cooling age of the white dwarf to an estimate of the progenitor's main sequence lifetime. To better understand how CA correlates to stellar age, 14 cluster member stars were also observed. Our observations demonstrate for the first time that in general CA decays with age from 50 Myr to at least 8 Gyr for stars with 1.0 < V-I < 2.4. However, little change occurs in CA level for stars with V-I < 1.0 between 1 Gyr and 5 Gyr, consistent with the results of Pace et al. (2009). Our sample also exhibits a negative correlation between stellar age and metallicity, a positive correlation between stellar age and W space velocity component and the W velocity dispersion increases with age. Finally, the population membership of these wide binaries is examined based upon their U, V, W kinematics, metallicity and CA. We conclude that wide binaries are similar to field and cluster stars in these respects. More importantly, they span a much more continuous range in age and metallicity than is afforded by nearby clusters.

Affiliated with

Also associated with

No associations

Rating

The Chromospheric Activity, Age, Metallicty and Space Motions of 36 Wide Binaries 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 Chromospheric Activity, Age, Metallicty and Space Motions of 36 Wide Binaries, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Chromospheric Activity, Age, Metallicty and Space Motions of 36 Wide Binaries will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-286545