EDP Sciences
Free Access
Issue
A&A
Volume 580, August 2015
Article Number L7
Number of page(s) 9
Section Letters
DOI https://doi.org/10.1051/0004-6361/201526474
Published online 07 August 2015

Online material

thumbnail Fig. 2

Position of the IRDCs in the Galaxy (Courtesy of NASA/JPL-Caltech): G336.9, G337.1, and G337.2 are indicated by a blue circle, G010.4 and G018.7 by a red and a green one. The position of the Sun is also indicated.

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Appendix A

Table A.1

Observed molecular transitions.

Table A.2

Coordinates and basic aspects of the five IRDCs.

Table A.3

Overview of the physical properties of the IRDCs.

thumbnail Fig. A.1

Black: HIFI spectra of the para-H2O ground-state absorption line at 1113.343 GHz for the line of sight towards G010.4 (top left), G018.7 (top right), G336.9 (bottom left), and G337.2 (bottom right). Green: FLASH CO(3−2) spectra, rescaled dividing by 50 and shifted by the amount indicated in green on the left. Red: C17O(3−2) spectrum, rescaled dividing by 16 and shifted by the amount indicated in red on the left. The tangential velocity (± 10 km s-1, dashed) is indicated in blue.

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thumbnail Fig. A.2

GLIMPSE false-colour images (red: 8 μm, green: 4.5 μm, blue: 3.6 μm) of G010.4 a), G018.7 b), G336.9 c), G337.2 d). The yellow contours show the 870 μm emission from the ATLASGAL survey, ranging from 0.14 to 1.59 Jy beam-1 in equal log steps of 0.15 dex in a); from 0.14 to 3.98 Jy beam-1 in equal log steps of 0.16 dex in b); from 0.14 to 1.12 Jy beam-1 in equal log steps of 0.15 dex in c); and from 0.15 to 1.91 Jy beam-1 in equal log steps of 0.16 dex in d). The red plus indicates the position of the molecular-line observations.

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thumbnail Fig. A.3

High-density tracers observed with Mopra. The source name is indicated above each panel. For each source, the HCO+(1−0) (black) and H13CO+(1−0) (red) spectra are shown in the top sub-panel, whereas the HNC(1−0) (black) and HN13C(1−0) (red) spectra are shown in the bottom sub-panel. The VLSR of the source is indicated in blue.

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thumbnail Fig. A.4

MALT90 HCO+(1−0) zeroeth moment map (contours) superimposed on the ATLASGAL sub-mm continuum emission at 870 μm (colourscale) for G010.4 (top left), G336.9 (top right), G337.1 (bottom left), and G337.2 (bottom right). The Mopra and APEX beam sizes are indicated.

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© ESO, 2015

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