Investigation on gas kinematics and dynamics of the Carina Pillars: Origin of flows and estimation of physical properties
- Principal Investigator
- Archana Soam
- Proposal ID
- 09_0512
- Category
- STAR_FORMATION
- Keywords
- H II REGIONS
- MOLECULAR CLOUDS
- STAR FORMATION
Abstract
The interaction of newly formed stars with their natal clouds give a rise to a number of dynamical and chemical effects, forming HII regions, injecting energy in the surrounding ISM, and forming PDRs. These provide valuable laboratories of radiation driven dynamics and physical/chemical evolution of the gas and dust. Because of their high spectral resolution, SOFIA/GREAT data provide detailed information on star-formation, gas flows, turbulent motions and constraints models of radiation driven cloud evolution and the chemistry and physics of PDRs. For this purpose, we propose to work on SOFIA archival data of the Carina nebula under project 75_0038. This project contains a sufficient amount of mid- and high-J CO lines with [OI] 63 um data on four Carina pillars irradiated by eta-Carina. We already started analyzing data on one of the pillars, G287.76-0.87. Our preliminary results shows that the head of this pillar is moving toward us more slowly than eta-Carina, so in the rest frame of this star, the pillar is moving away from us. If the pillars form part of an expanding complex, then this velocity would mean that the pillar is on the far side, i.e., more distant than eta-Carina. We want to extend our investigation in other two pillars, namely G287.722-0.59 and G287.926-0.1. The Carina nebula has also been studied by ALMA, APEX, SIRPOL, BLASTPol etc. Therefore, available SOFIA archival data will be combined with these other available datasets to perform a multiwavelength analysis of gas flows and physical properties of the pillars in Carina. One paper on kinematics of a single pillar is under preparation. We expect two more papers, one gas and dust emissions and other with gas flows and magnetic field orientations. Therefore, we request for one year of SARP funding for the completion of this project.