Free Access

Fig. 4


Comparison of the M 82 and NGC 253 fractional abundances of different molecules with respect to the C34S (3 − 2) abundances. All the fractional abundances have been calculated from the millimeter frequency surveys of Martín et al. (2006b) and this paper except for: a) C18O: Martín et al. (2009a); b) C18O, HCO, HOC+, and H13CO+: Martín et al. (2009b); c) CH3CCH, CS and HC3N: Aladro et al. (2011); d) CO+: Fuente et al. (2006); e) HOC+: Aladro et al. (in prep.).

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.