Free Access
Volume 569, September 2014
Article Number A125
Number of page(s) 21
Section Galactic structure, stellar clusters and populations
Published online 03 October 2014

Online material

Appendix A: Tracer data for spiral structure

The related parameters of HII regions, GMCs, and 6.7 GHz methanol masers have been collected and calculated based on the data in literature, as listed in Tables A.1A.3, respectively.

Table A.1

HII regions as tracers of spiral arms.

Table A.2

GMCs as tracers of spiral arms.

Table A.3

6.7 GHz methanol masers as tracers of spiral arms.

© ESO, 2014

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.