Outflows in High-Mass Star Forming Regions

A sample of 11 high-mass star forming regions (SFRs) in the earliest evolutionary phases has been mapped in the 13CO(2-1) and C18O(2-1) lines using the IRAM 30-m radio telescope. The goal is to detect molecular outflows and determine their parameters. Molecular outflows have been detected in six of our sources. Their mean mass and mass loss rate are ∼ 100 M⊙ and ∼ 5 ×10 − 3 M⊙/yr respectively, suggesting that the powering Young Stellar Objects (YSOs) are massive and probably still in the accretion phase.