Chromospheric Activity, Stellar Winds and Red Stragglers

Details Chromospheric Activity, Stellar Winds and Red Stragglers Chromospheric Activity, Stellar Winds and Red Stragglers

Dec 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996rmxac...5...16p&link_type=abstract

Workshop on Colliding Winds in Binary Stars to Honor Jorge Sahade, vol. 5, p. 16

Computer Science

4

Dust Storms, Cosmic Dust, Stellar Winds, Binary Stars, Chromosphere, Analogies, Angular Momentum, Blue Stars, Coalescing, Late Stars, Losses, Main Sequence Stars

Scientific paper

We present a number of late type main-sequence stars whose strong chromospheric activity would imply ages significantly smaller than those given by their kinematics. We discuss processes which may explain this inconsistency, and conclude that the most likely explanation is the rejuvenation of the primary component of a close binary (P less than 5 days), either by the spin-up induced by the loss of orbital angular momentum through their magnetized winds, or by the final coalescence of the close pair. By analogy with the blue straggler phenomenon we propose to call the coalesced objects 'red stragglers', since they straggle out of their expected position in velocity space.

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