GMC Collisions as Triggers of Star Formation. V. Observational Signatures

Bisbas, T.G.University of Florida,Max-Planck-Institut für extraterrestrische Physik,Max Planck Institute for Extraterrestrial Physics (författare)

© 2017. The American Astronomical Society. All rights reserved.. We present calculations of molecular, atomic, and ionic line emission from simulations of giant molecular cloud (GMC) collisions. We post-process snapshots of the magnetohydrodynamical simulations presented in an earlier paper in this series by Wu et al. of colliding and non-colliding GMCs. Using photodissociation region (PDR) chemistry and radiative transfer, we calculate the level populations and emission properties of the transitions of 12 CO J = 1-0, [C i] at 609 μm, [C ii] 158 μm, and [O i] at 63 μm. From emission maps of integrated intensity and position-velocity diagrams, we find that fine-structure lines, particularly [C ii] 158 μm, can be used as a diagnostic tracer for cloud-cloud collision activity. These results hold even in more evolved systems in which the collision signature in molecular lines has been diminished.

NATURVETENSKAP Fysik Astronomi, astrofysik och kosmologi hsv//swe
NATURAL SCIENCES Physical Sciences Astronomy, Astrophysics and Cosmology hsv//eng
magnetic fields - ISM
clouds - ISM
ISM
structure - methods
numerical
lines and bands - ISM
kinematics and dynamics - ISM

Tanaka, K.E.I.University of Florida (författare)
Tan, JonathanNational Astronomical Observatory of Japan,University of Florida(Swepub:cth)tanj (författare)
Wu, B.National Astronomical Observatory of Japan (författare)
Nakamura, F.National Astronomical Observatory of Japan (författare)
University of FloridaMax-Planck-Institut für extraterrestrische Physik (creator_code:org_t)

Ingår i:Astrophysical Journal: American Astronomical Society850:1, s. 23-321538-43570004-637X

Av författaren/redakt...: Bisbas, T.G.; Tanaka, K.E.I.; Tan, Jonathan; Wu, B.; Nakamura, F.

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