https://doi.org/10.1051/epjconf/20121908008
Fountain-driven gas accretion by the Milky Way
1 Dipartimento di Astronomia, Università di Bologna, via Ranzani 1, 40127 Bologna, Italy
2 Heidelberger Institut für Theoretische Studien, Schloss-Wolfsbrunnenweg 35, 69118 Heidelberg, Germany
3 Zentrum für Astronomie der Universität Heidelberg, Astronomisches Recheninstitut, Mönchhofstr. 12-14, 69120 Heidelberg, Germany
4 Rudolf Peierls Centre for Theoretical Physics, Keble Road, Oxford OX1 3NP, UK
5 INAF-Osservatorio Astronomico di Bologna, via Ranzani 1, 40127 Bologna, Italy
a e-mail: federico.marinacci@h-its.org
Accretion of fresh gas at a rate of ∼ 1M☉yr−1 is necessary in star-forming disc galaxies, such as the Milky Way, in order to sustain their star-formation rates. In this work we present the results of a new hydrodynamic simulation supporting the scenario in which the gas required for star formation is drawn from the hot corona that surrounds the star-forming disc. In particular, the cooling of this hot gas and its accretion on to the disc are caused by the passage of cold galactic fountain clouds through the corona.
© Owned by the authors, published by EDP Sciences, 2012
