Structure formation in a colliding flow: The Herschel view of the Draco nebula⋆⋆

Author: Miville-Deschênes M.-A.   Salomé Q.   Martin P. G.   Joncas G.   Blagrave K.   Dassas K.   Abergel A.   Beelen A.   Boulanger F.   Lagache G.   Lockman F. J.   Marshall D. J.  

Publisher: Edp Sciences

E-ISSN: 1432-0746|599|issue|A109-A109

ISSN: 0004-6361

Source: Astronomy & Astrophysics, Vol.599, Iss.issue, 2017-03, pp. : A109-A109

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Abstract

Context. The Draco nebula is a high Galactic latitude interstellar cloud observed at velocities corresponding to the intermediate velocity cloud regime. This nebula shows unusually strong CO emission and remarkably high-contrast small-scale structures for such a diffuse high Galactic latitude cloud. The 21 cm emission of the Draco nebula reveals that it is likely to have been formed by the collision of a cloud entering the disk of the Milky Way. Such physical conditions are ideal to study the formation of cold and dense gas in colliding flows of diffuse and warm gas.

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