Resolving the Puzzle of Hybrid Star Coronal X-rays

Details Resolving the Puzzle of Hybrid Star Coronal X-rays Resolving the Puzzle of Hybrid Star Coronal X-rays

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004cxo..prop.1644a&link_type=abstract

Chandra Proposal ID #06200370

Physics

Chandra Proposal Id #06200370

Scientific paper

We propose 20 ks HRC-I pointings to detect 3 members of the so-called "hybrid star" class, and 50 ks to confirm a previous HRC-I detection of the archetype noncoronal giant Arcturus. Coronal activity, mirrored in X-ray emission, 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. Our program will explore the limits of X-ray activity across the "coronal dividing line," focussing on targets for which ROSAT-era detections have been challenged recently. Assessing the true levels of coronal activity in these objects has important implications for understanding the initiation of chromospheric winds in red giants, a key phenomenon whose origins remain elusive.

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