HI for Systems in the Toomre Sequence

John Hibbard, NRAO

Figure Caption:

A mosaic of VLA HI observations for a range of merging galaxies, taken from the Toomre Sequence (Toomre, 1977).

HI in white contours on optical image in false spectral colors. All reproduced on approximately the same linear scale, assuming Ho=75 km/s/Mpc.

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Individual .gifs available for

• Arp 295 (actually, a pre-sequence object)
• NGC 4038/9
• NGC 4676
• NGC 520
• NGC 2623
• NGC 3256 (ATCA image courtesy of J. English, Queens University (from English, Norris, Booth, Freeman, Aalto \& Black in preparation); optical image from the DSS). See also the image of NGC 3256 in the HI Rogues Gallery
• NGC 3921
• NGC 7252

Optical Images (see also links from here):
• For Juan: b/w mosaic, individual frames taken from Arps Atlas of Peculiar Galaxies
• See also HST WFPC Imaging of Toomre Sequence