2008A&A...488..623C


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.16CEST22:49:37

2008A&A...488..623C - Astronomy and Astrophysics, volume 488, 623-634 (2008/9-3)

A clumpy-cloud photon-dominated regions model of the global far-infrared line emission of the Milky Way.

CUBICK M., STUTZKI J., OSSENKOPF V., KRAMER C. and ROELLIG M.

Abstract (from CDS):

The fractal structure of the interstellar medium suggests that the interaction of UV radiation with the ISM as described in the context of photon-dominated regions (PDR) dominates most of the physical and chemical conditions, and hence the far-infrared and submm emission from the ISM in the Milky Way. We investigate to what extent the Galactic FIR line emission of the important species CO, C, [+]C, and O, as observed by the Cosmic Background Explorer (COBE) satellite can be modeled in the framework of a clumpy, UV-penetrated cloud scenario. The far-infrared line emission of the Milky Way is modeled as the emission from an ensemble of clumps with a power law clump mass spectrum and mass-size relation with power-law indices consistent with the observed ISM structure. The individual clump line intensities are calculated using the KOSMA-τ PDR-model for spherical clumps. The model parameters for the cylindrically symmetric Galactic distribution of the mass density and volume filling factor are determined by the observed radial distributions. A constant FUV intensity, in which the clumps are embedded, is assumed. We show that this scenario can explain, without any further assumptions and within a factor of about 2, the absolute FIR-line intensities and their distribution with Galactic longitude as observed by COBE.

Abstract Copyright:

Journal keyword(s): ISM: clouds - Galaxy: disk - infrared: ISM - infrared: galaxies - submillimeter - ISM: structure

Simbad objects: 8

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Number of rows : 8

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 1906 1
2 NGC 3372 HII 10 44 19.0 -59 53 21           ~ 865 2
3 NAME Polaris Flare MoC 11 00 14.8 +86 10 52           ~ 157 1
4 M 51 GiP 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 3680 4
5 M 83 SBG 13 37 00.919 -29 51 56.74 8.85 8.11 7.52 7.21   ~ 2157 2
6 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 10997 0
7 NAME Cyg X Cld 20 28 41 +41 10.2           ~ 586 1
8 NAME Galactic Molecular Ring PoG ~ ~           ~ 38 0

    Equat.    Gal    SGal    Ecl

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2019.10.16-22:49:37

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