A&A 502, 139–153 (2009) Astronomy DOI: 10.1051/0004-6361/200911818 & c ESO 2009 Astrophysics Star formation in Perseus V. Outflows detected by HARP J. Hatchell1 and M. M. Dunham2 1 School of Physics, University of Exeter, Stocker Road, Exeter EX4 4QL, UK e-mail:
[email protected] 2 Department of Astronomy, The University of Texas at Austin, 1 University Station, C1400, Austin, Texas 78712-0259, USA Received 9 February 2009 / Accepted 8 April 2009 ABSTRACT Aims. Molecular outflows provide an alternative method of identifying protostellar cores, complementary to recent mid-infrared studies. Continuing our studies of Perseus, we investigate whether all Spitzer-identified protostars, and particularly those with low luminosities, drive outflows and if any new protostellar cores (perhaps harbouring low-mass sources) can be identified via their outflows alone. Methods. We have used the heterodyne array receiver HARP on JCMT to make deep 12CO 3–2 maps of submm cores in Perseus, extending and deepening our earlier study with R×B and bringing the total number of SCUBA cores studied up to 83. Our survey includes 23/25 of the Spitzer low-luminosity objects believed to be embedded protostars, including three VeLLOs. Results. All but one of the cores identified as harbouring embedded YSOs have outflows, confirming outflow detections as a good method for identifying protostars. We detect outflows from 20 Spitzer low-luminosity objects. We do not conclusively detect any outflows from IR-quiet cores, though confusion in clustered regions such as NGC1333 makes it impossible to identify all the individual driving sources.