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Volume 529, May 2011
Article Number L7
Number of page(s) 13
Section Letters
Published online 13 April 2011

Online material

Appendix A: Tables

Table A.1 contains the list of the observed sources selected as explained in Sect. 2 of the main body text, and give some information extracted from the literature about the star forming regions in which the sources lie. Table A.2 presents the observed transitions and some main technical observational parameters. Table A.3 shows the results of the fitting procedure to the N2D+ (2–1) and N2H+ (3–2) lines (see Sect. 2 of the main body text) of all sources, and the physical parameters derived from these results, namely the N2H+ and N2D+ column densities and their ratio, Dfrac. Other parameters discussed in Sect. 3 of the main body text are also listed.

Table A.1

List of the observed sources.

Table A.2

Observed transitions and technical parameters.

Table A.3

Observational and derived line parameters.

Appendix B: Spectra

In this appendix, all spectra of N2D+ (2–1) and N2H+ (3–2) transitions, for the sources detected in both transitions, are shown.

thumbnail Fig. B.1

Spectra of N2D+ (2–1) and N2H+ (3–2) obtained towards the sources classified as HMSCs. For each spectrum, the velocity interval shown is  ± 10 km s-1 from the systemic velocity listed in Table A.1. The y-axis is in main beam brightness temperature units. In the spectra of I00117-MM2, the vertical bars show the position of the hyperfine components.

Open with DEXTER

thumbnail Fig. B.2

Same as Fig B.1 for HMPOs.

Open with DEXTER

thumbnail Fig. B.3

Same as Fig. B.1 for UC HII regions.

Open with DEXTER

© ESO, 2011

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