Synthetic Observations of Carbon Lines of Turbulent Flows in Diffuse Multiphase Interstellar Medium

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dc.creatorYamada, M.
dc.creatorKoyama, H.
dc.creatorOmukai, K.
dc.creatorInutsuka, S.
dc.date2006-11-29
dc.date.accessioned2026-07-07T10:21:04Z
dc.date.available2026-07-07T10:21:04Z
dc.descriptionWe examine observational characteristics of multi-phase turbulent flows in the diffuse interstellar medium (ISM) using a synthetic radiation field of atomic and molecular lines. We consider the multi-phase ISM which is formed by thermal instability under the irradiation of UV photons with moderate visual extinction $A_V\sim 1$. Radiation field maps of C$^{+}$, C$^0$, and CO line emissions were generated by calculating the non-local thermodynamic equilibrium (nonLTE) level populations from the results of high resolution hydrodynamic simulations of diffuse ISM models. By analyzing synthetic radiation field of carbon lines of [\ion{C}{2}] 158 $μ$m, [\ion{C}{1}] $^3P_2-^3P_1$ (809 GHz), $^3P_1-^3P_0$ (492 GHz), and CO rotational transitions, we found a high ratio between the lines of high- and low-excitation energies in the diffuse multi-phase interstellar medium. This shows that simultaneous observations of the lines of warm- and cold-gas tracers will be useful in examining the thermal structure, and hence the origin of diffuse interstellar clouds.
dc.description16 pages, 10 figures : accepted for publication in ApJ. PDF version with high resolution figures is available (http://yso.mtk.nao.ac.jp/~ymasako/paper/ms_hires.pdf)
dc.identifierhttps://arxiv.org/abs/astro-ph/0611874
dc.identifierhttp://arxiv.org/abs/astro-ph/0611874
dc.identifierAstrophys.J.657:849-859,2007
dc.identifierdoi:10.1086/511257
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/175049
dc.subjectAstrophysics
dc.titleSynthetic Observations of Carbon Lines of Turbulent Flows in Diffuse Multiphase Interstellar Medium
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