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We probe the recent cosmic expansion by directly reconstructing thedeceleration parameter $q(z)$ at recent times with a linear expansion at $z=0$using the low redshift SNIa and BAO data. Our results show that theobservations seem to favor a slowing down of the present cosmic acceleration.Using only very low redshift SNIa data, for example, those within $z<0.1$ or$0.2$, we find that our Universe may have already entered a deceleratingexpansion era since a positive $q(0)$ seems to be favored. This result isfurther supported by a different approach which aims to reconstruct $q(z)$ inthe whole redshift region. So, the accelerating cosmic expansion may be just atransient phenomenon.

Is the present cosmic expansion decelerating?