Filling in the Coronal Graveyard

Details Filling in the Coronal Graveyard Filling in the Coronal Graveyard

Sep 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007cxo..prop.2333a&link_type=abstract

Chandra Proposal ID #09200270

Astronomy and Astrophysics

Astrophysics

Chandra Proposal Id #09200270

Scientific paper

20 ks Chandra HRC-I pointings on 5 late-type G/K supergiants in the depths of the "coronal graveyard" will complete a survey of the limits of X-ray activity in evolved cool stars. Our ambition is to gain insight into magnetic generation in the absence of sensible rotation, and the disposition of hot coronal structures in the extended outer envelopes of these objects, possibly partially smothered under a "cool absorber." Such buried activity might be the long sought initiator of chromospheric winds in the giant branch. Coronal activity is important to the Sun-Earth connection, the fate of primitive planetary atmospheres, and a broad reaching set of magnetic phenomena in diverse cosmic environments. Understanding the activity, and its evolution, is a key objective of stellar astrophysics.

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