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Doppler Imaging of the Ap starϵUrsae Majoris: Ca, Cr, Fe, Mg, Mn, Ti, Sr
2003
Astronomy and Astrophysics
The surface abundance structure of seven elements of the brightest chemically peculiar A-type star, Ursae Majoris ( UMa, HD 112185, HR 4905) has been determined. Cr, Fe and, Mn are enhanced at the magnetic polar region of UMa while they avoid the magnetic equator. Sr seems to behave like Cr, Fe, and Mn, but is concentrated only at one of the two magnetic poles. Ti, in contrast, is accumulated at the magnetic equator and is depleted where Cr and Fe are accumulated, in accordance with theoretical
doi:10.1051/0004-6361:20030771
fatcat:lwc34izmvrdnrd63ltgn2gmgoi