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We present the detection of a dust continuum source at 3-mm (CARMA) and1.3-mm (SMA), and 12CO(2-1) emission (SMA) towards the L1451-mm dense core.These detections suggest a compact object and an outflow where no point sourceat mid-infrared wavelengths is detected using Spitzer. An upper limit for thedense core bolometric luminosity of 0.05 Lsun is obtained. By modeling thebroadband SED and the continuum interferometric visibilities simultaneously, weconfirm that a central source of heating is needed to explain the observations.This modeling also shows that the data can be well fitted by a dense core witha YSO and disk, or by a dense core with a central First Hydrostatic Core(FHSC). Unfortunately, we are not able to decide between these two models,which produce similar fits. We also detect 12CO(2-1) emission with red- andblue-shifted emission suggesting the presence of a slow and poorly collimatedoutflow, in opposition to what is usually found towards young stellar objectsbut in agreement with prediction from simulations of a FHSC. This presents thebest candidate, so far, for a FHSC, an object that has been identified insimulations of collapsing dense cores. Whatever the true nature of the centralobject in L1451-mm, this core presents an excellent laboratory to study theearliest phases of low-mass star formation.

The enigmatic core L1451-mm: a first hydrostatic core? or a hidden VeLLO?