A second look at N=1 supersymmetric AdS4 vacua of type IIA supergravity

We show that a class of type IIA vacua recently found within the D= 4 effective approach corresponds to compactification on AdS(4) x S-3 x S-3/Z(2)(3). The results obtained using the effective method completely match the general ten-dimensional analysis for the existence of N=1 warped compactifications on AdS(4) x M-6. In particular, we verify that the internal metric is nearly-Kahler and that for specific values of the parameters the Bianchi identity of the RR 2-form is fulfilled without sources. For another range of parameters, including the massless case, the Bianchi identity is satisfied when D6-branes are introduced. Solving the tadpole cancellation conditions in D= 4 we are able to find examples of appropriate sets of branes. In the second part of this paper we describe how an example with internal space CP3 but with non nearly-Kahler metric fits into the general analysis of flux vacua.