Study of the Chamaeleon I Dark Cloud and T-Association-IV Infrared Objects NearCederblad 110

摘要

IRAS Pointed Observations are used to study the pre-main sequence (PMS) objectsassociated with the reflection nebula Cederblad 110 in the Chamaeleon 1 star forming cloud. Nine PMS stars are identified, and near-infrared observations are presented and combined with IRAS data to investigate their evolutionary status. The nine objects represent various low-mass PMS stages from deeply embedded protostar candidates to naked T Tauri stars approaching the ZAMS, indicating that star formation has been going on for millions of years in the immediate vicinity of Cederblad 110. The two youngest PMS objects, Ced 110 IRS4 and Ced 110 IRS6, are projected on to the densest gas of the Chamaeleon I cloud suggesting an on-going star formulation process in the Cederblad 110 region.