Free Access

Fig. 1.

image

Top panel: high spatial resolution HST image of Arp 240 taken with the Advanced Camera for Surveys (ACS) in its Wide Field Channel (WFC) in the F435W filter (between U- and B-bands). Middle panel: HST-ACS WFC image in the F814W filter (close to the I-band). Bottom panel: monochromatic Hα (continuum subtracted) image of the pair obtained from the scanning Fabry–Perot interferometer PUMA data cubes. Ellipses indicate the location of the bifurcation radius, Rbif, in the rotation curve of NGC 5257 and NGC 5258, respectively. These are discussed in Sect. 4.3. HST images taken from the HST archive, proposal 10592 by Aaron Evans. NGC 5257 is the galaxy on the right of the image, and NGC 5258 is the galaxy on the left. North is to the top, east is to the left.

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.