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The aim of this work is to search for radio signals in the quiescent phase ofaccreting millisecond X-ray pulsars, in this way giving an ultimate proof ofthe recycling model, thereby unambiguously establishing that accretingmillisecond X-ray pulsars are the progenitors of radio millisecond pulsars.  To overcome the possible free-free absorption caused by matter surroundingaccreting millisecond X-ray pulsars in their quiescence phase, we performed theobservations at high frequencies. Making use of particularly precise orbitaland spin parameters obtained from X-ray observations, we carried out a deepsearch for radio-pulsed emission from the accreting millisecond X-ray pulsarXTE J0929-314 in three steps, correcting for the effect of the dispersion dueto the interstellar medium, eliminating the orbital motions effects, andfinally folding the time series.  No radio pulsation is present in the analyzed data down to a limit of 68microJy at 6.4 GHz and 26 microJy at 8.5 GHz.  We discuss several mechanisms that could prevent the detection, concludingthat beaming factor and intrinsic low luminosity are the most likelyexplanations.

Searching for pulsed emission from XTE J0929-314 at high radio frequencies