Free Access

Fig. 1


Radio continuum contours from the narrow-band 21-cm of NGC 3998 overlaid on an r-band optical image from the Sloan Digital Sky Survey (Alam et al. 2015). The contours from the radio continuum were produced from the 21-cm narrow-band data using uniform weighting – which corresponds to a robustness parameter in MIRIAD of –2. The beam-size is indicated in the lower-left corner of the image. The contours are given by Sc = S0×2n mJy beam-1, for n = 0,1,2,...,10, where S0 = 0.150 mJy beam-1 is the 3σ sensitivity as indicated in Table 1.

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.