Arecibo Observatory

UGC/AGC 7345     NGC 4254

Find the entry of this object in the ALFALFA archive, and use the images and links there to find the answers to these questions. As always, it is most important that you understand how to derive quantitative answers and their uncertainties.

  1. What is unusual about the optical appearance of this galaxy?
  2. How does the optical appearance compare with the VLA HI map made by the VIVA survey?
  3. Check out the ALFALFA map of Virgo HI21.

SDSS link

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Last updated Sat Oct 20 11:00:33 EDT 2007 by martha