Noname manuscript No. (will be inserted by the editor) From diffuse gas to dense molecular cloud cores Javier Ballesteros-Paredes · Philippe Andre,´ · Patrick Hennebelle, · Ralf S. Klessen, · Shu-ichiro Inutsuka, · J. M. Diederik Kruijssen, · Melanie´ Chevance, · Fumitaka Nakamura, · Angela Adamo · Enrique Vazquez-Semadeni Received: 2020-01-31 / Accepted: 2020-05-17 Abstract Molecular clouds are a fundamental ingredient of galaxies: they are the channels that transform the diffuse gas into stars. The detailed process of how they Javier Ballesteros-Paredes Instituto de Radioastronom´ıa y Astrof´ısica, UNAM, Campus Morelia, Antigua Carretera a Patzcuaro 8701. 58090 Morelia, Michoacan, Mexico. E-mail:
[email protected] Philippe Andre´ Laboratoire d’Astrophysique (AIM), CEA/DRF, CNRS, Universite´ Paris-Saclay, Universite´ Paris Diderot, Sorbonne Paris Cite,91191´ Gif-sur-Yvette, France Patrick Hennebelle AIM, CEA, CNRS, Universite´ Paris-Saclay, Universite´ Paris Diderot, Sorbonne Paris Cite,´ 91191, Gif- sur-Yvette, France Ralf S. Klessen Universitat¨ Heidelberg, Zentrum fur¨ Astronomie, Institut fur¨ Theoretische Astrophysik, Albert-Ueberle- Str. 2, 69120 Heidelberg, Germany, Department of Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan J. M. Diederik Kruijssen Astronomisches Rechen-Institut, Zentrum fur¨ Astronomie der Universitat¨ Heidelberg, Monchhofstraße¨ 12- 14, 69120 Heidelberg, Germany, Melanie´ Chevance Astronomisches Rechen-Institut, Zentrum fur¨ Astronomie der Universitat¨ Heidelberg,