Looking in the cradle of new-born low mass stars

Coordinator: Claudio Melo, Nuria Huelamo, Michael Sterzik

The high binary fraction found among the young binaries suggest that multiplicity is established very early and it is likely to be associated to star formation process itself. Current scenarios suggest that molecular cloud cores might fragment into N-body clusters (where typically N~10). Dynamical interactions among the fragments will cause these bodies to pair into bound multiple systems. Although the main aspect of the (multiple) stellar formation scenario seem to have been identified, many questions remain to be answered: when does the core fragmentation occur, or, in other words, how early is binarity established? Is the outcome of the fragmentation scenario dependent on the grain dust properties? Does metallicity play a role in this process? Here, we propose to observe 3 known class I proto-binaries (L1551 IRS5, L1551NE, L1630 SSV63) discovered by mm observations with the VLA to look for undetected companions.

Program is available and data products can be downloaded

Project description/science scope

Observing strategy
Straightforward imaging program of proto-binaries. In the case of L1551NE and SSV63, the *SIV* OBs must executed first.

Target list
NameRA(2000)DEC(2000)ModeObs.Time (h)Priority
L1551IRS504:31:34.318:08:05.1N,Q img N,Q13 (lowest)
L1551NE04:31:44.518:08:31.7N,Q img SIV11 (highest)
L1551NE04:31:44.518:08:31.7N,Q img PAH1/212
SSV6305:46:08.6-00:10:02.0N,Q img SIV11
SSV6305:46:08.6-00:10:02.0N,Q img PAH1/212