Optical spectroscopy of MT Dra in 2006 and 2009

Details Optical spectroscopy of MT Dra in 2006 and 2009 Optical spectroscopy of MT Dra in 2006 and 2009

2011-04-22

arxiv.org/abs/1104.4413v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

6 pages, 4 figures

Scientific paper

We present low-resolution phase-resolved spectra of the polar MT Dra during
its high states in 2006 and 2009. Balmer series, He I and He II 4686 \AA\
emission lines have complex shapes and show similar profile variations over an
orbital cycle. The radial velocities vary with orbital period and display
motions of the gas falling close to the magnetic poles of the white dwarf.

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