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VV-29 received wide press coverage during May 2002, when it appeared on the
front pages of major newspapers to announce the commissioning of the
Hubble Space Telescope's Advanced Camera. The galaxy was featured as
the May 2, 2002
Astronomy Picture of the Day. The bright, blue-ish center of the new galaxy
VV-29c can be seen through the double spiral arms of VV-29.
The mosaic of images below compares the HST image with two other
diagnostic images: one comes from the
Westerbork Radio Synthesis Telescope,
and the second from the
2.5m Isaac Newton optical telescope
in La Palma. The images are oriented with north upward and east to the
left.
The color radio image records the emission from the galaxy in
the 21cm line of neutral hydrogen, indicating both the extent of the
hydrogen gas and its velocity along the line of sight to the observer
(using the Doppler effect). The blue end of the spectrum indicates the
regions in the galaxy that are approaching us, while the red regions of
the `velocity field' indicate recession. The WSRT observations revealed
the second galaxy VV29c through its velocity offset, which you can
see as the red background object that is viewed through the
artificial perforation in the velocity field on the right side of
the galaxy.
The very deep Isaac Newton Telescope image has also been heavily
smoothed to bring out the faintest diffuse light levels. This
reveals additional structures not seen in the HST image: a faint
counter-arm to the right, and a vertical spur on the left side
of the main body of the galaxy.
