We have investigated the global dynamical state of the Integral Shaped Filament in the Orion A cloud using new N2H+ (1-0) large-scale, IRAM30m 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.
@article{arxiv.1703.03464,
title = {Gravitational collapse of the OMC-1 region},
author = {A. Hacar and J. Alves and M. Tafalla and J. R. Goicoechea},
journal= {arXiv preprint arXiv:1703.03464},
year = {2017}
}