Cyclotron Humps in Am-Herculis Systems - Variations around the Orbit in Dp-Leonis

Details Cyclotron Humps in Am-Herculis Systems - Variations around the Orbit in Dp-Leonis Cyclotron Humps in Am-Herculis Systems - Variations around the Orbit in Dp-Leonis

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mnras.245..760c&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. 245, NO.4/AUG15, P. 760, 1990

Astronomy and Astrophysics

Astronomy

17

Scientific paper

We present new phase-resolved spectra of DP Leo which show prominent cyclotron humps when the cyclotron-emission region is viewed perpendicularly to the magnetic field. One hump, at ˜ 15 890 cm-1, is particularly prominent. The hump positions have been analysed using a more accurate model, and this yields a revised estimate for the magnetic field of 32±1 MG. We have also identified Zeeman features in the spectra at certain phases which yield a similar field strength. By differentiating the light curve we have independently confirmed the extent of the emission arc as 50-60°, and have found that the bulk of the emission area is probably located ahead in phase and at lower latitudes than the position at which the emission peaks.

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