Gravitational collapse of the OMC-1 region
Abstract
We have investigated the global dynamical state of the integral shaped filament in the Orion A cloud using new N2H+ (1-0) large-scale, IRAM 30 m observations. Our analysis of its internal gas dynamics reveals the presence of accelerated motions towards the Orion Nebula Cluster, showing a characteristic blue-shifted profile centred at the position of the OMC-1 South region. The properties of these observed gas motions (profile, extension, and magnitude) are consistent with the expected accelerations for the gravitational collapse of the OMC-1 region and explain both the physical and kinematic structure of this cloud.
Based on observations carried out with the IRAM 30 m Telescope. IRAM is supported by INSU/CNRS (France), MPG (Germany) and IGN (Spain).- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- June 2017
- DOI:
- arXiv:
- arXiv:1703.03464
- Bibcode:
- 2017A&A...602L...2H
- Keywords:
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- ISM: clouds;
- ISM: kinematics and dynamics;
- ISM: structure;
- stars: formation;
- submillimeter: ISM;
- Astrophysics - Astrophysics of Galaxies;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- 5 pages, 2 figures
