Density Stratification of the Very Hot Corona of YY Mensae

Details Density Stratification of the Very Hot Corona of YY Mensae Density Stratification of the Very Hot Corona of YY Mensae

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cxo..prop..761g&link_type=abstract

Chandra Proposal ID #03200558

Computer Science

Chandra Proposal Id #03200558

Scientific paper

Chandra HETGS observations give access to a number of He-like line triplets that are sensitive to the density of hot coronal plasma. The present proposal requests observing time on an outstanding single star that has revealed an extremely hot and luminous corona. We aim at measuring the density structure of its corona together with its anomalous abundances. The target, YY Mensae, reveals a corona in which 90 percent of the emission measure resides at 30-40 MK. It has been suggested that such coronae are heated by statistical flares. A thorough spectroscopic study of this object could decide on whether its corona is indeed composed of numerous high-density compact flaring loops. The emission measure distribution will be studied to investigate whether it is generated by frequent flaring.

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