What is shown in this image?
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In my novice opinion, this is an interesting image. Are their two galaxies shown? Merging at near right angles (if that makes any sense)? Left side of the disk appears less dense than elsewhere. Help, please.
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by
Budgieye
moderator
It sounds like a good guess. New methods are being designed to help answer questions like this more accurately.
SDSS Mapping Nearby Galaxies at APO (MaNGA) https://www.sdss.org/surveys/manga/ "Unlike previous SDSS surveys which measured spectra only at the centers of target galaxies, MaNGA bundles sets of optical fibers into tightly-packed arrays, enabling spectral measurements across the face of each of ~10,000 nearby galaxies. MaNGA’s goal is to understand the “life cycle” of present day galaxies from imprinted clues of their birth and assembly, through their ongoing growth via star formation and merging, to their death from quenching at late times."
Redshift / Blueshift can be detected in rotating galaxies, but it takes more sensitive equipment than this to do a good job.. See this post in the forum.
Talk: Mapping Movement inside nearby galaxies with MaNGA https://talk.galaxyzoo.org/#/boards/BGZ0000001/discussions/DGZ0001ynm
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