Magnetic Fields on 'alien Dwarfs' - II : Coronal Activity in the Arcturus Moving Group

Details Magnetic Fields on 'alien Dwarfs' - II : Coronal Activity in the Arcturus Moving Group Magnetic Fields on 'alien Dwarfs' - II : Coronal Activity in the Arcturus Moving Group

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006cxo..prop.2111b&link_type=abstract

Chandra Proposal ID #08200759

Physics

Chandra Proposal Id #08200759

Scientific paper

The Arcturus Moving Group (AMG) is very likely a remnant of the merger of a dwarf galaxy with the Milky Way Galaxy in the distant past. This kinematically distinct group has members located very close to the Sun, allowing study of coronal activity on very old stars that would typically not be possible. We detected 2 AMG dwarfs with ACIS-S in Cycle 7 with L_x somewhat less than the minimum solar L_x. We propose to observe three additional AMG dwarf members with the aim of determining their X-ray luminosities, coronal temperatures, and the effects of low metallicity on coronal spectra. Our targets have metallicities between 0.4 and 0.04 solar, spectral types F9 - K0, and are at distances less than 30 pc from the Sun.

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