Coronal Evolution in Single Giants with Chandra LETGS X-Ray Spectroscopy

Details Coronal Evolution in Single Giants with Chandra LETGS X-Ray Spectroscopy Coronal Evolution in Single Giants with Chandra LETGS X-Ray Spectroscopy

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cxo..prop..755r&link_type=abstract

Chandra Proposal ID #03200240

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Chandra Proposal Id #03200240

Scientific paper

We propose to obtain high resolution Chandra LETGS spectra of the three single giants 24 UMa, beta Cet and 39 Cet. These stars are located at strategic places in the HR-diagram covering the mass range between 1.6 - 3 solar masses. The data will be sensitive enough to carry out detailed plasma diagnostics of the coronae of evolved stars. Density diagnostics, differential emission measure construction and abundance analysis will be carried out. A comparison to photospheric abundances will be performed since beta Cet has solar abundances, while the other target stars do not. The three target stars are the only single giants within practical reach of the Chandra LETGS and will allow us to study the influence of stellar mass on activity among giant stars.

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