We present an analysis of 210 high-resolution time-resolved
spectropolarimetric observations of the roAp star gamma Equ obtained over three
nights in August and September 2003. Radial velocity variations due to p-mode
non-radial pulsations are clearly detected in the lines of rare-earth elements,
in particular Pr III, Nd II and Nd III. In contrast, we find absolutely no
evidence for the variation of the mean longitudinal magnetic field over the
pulsation period in gamma Equ at the level of 110-240 G which was recently
reported by Leone & Kurtz (2003). Our investigation of the variability of
circularly polarized profiles of 13 Nd III lines demonstrates that, at the 3
sigma confidence level, no magnetic field variation with an amplitude above
40-60 G was present in gamma Equ during our monitoring of this star.Comment: accepted for publication by Astronomy & Astrophysic
