Merging
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by
Zebx
Hi, I've a question about merging. In this picture the irregular galaxy has z = 0.07859, the galaxy just under it has z = 0.07837. Is it plausible to think they're merging?
Posted
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by
Budgieye
moderator
You can calculate distances to the galaxies using this link
http://www.wolframalpha.com/input/?i=cosmological+redshift&a=*C.cosmological+redshift-_*Formula- (click on cosmological redshift)
If their separation is less than about 3 million light-years, then I would say that they have a gravitational interaction.
7.3 Measure distance http://talk.galaxyzoo.org/#/boards/BGZ0000001/discussions/DGZ0000wrb?page=7&comment_id=53d8bb6c0d43f776b00010af
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by
Zebx
Ah ok ok. I was not yet come to that thread(Index for galaxy zoo talk), I'm on "Astrophysics for galaxy zoo talk". Thank you for the informations! 😉
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Budgieye
moderator
Good luck with the calculations 😃 Are you going to show your workings?
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Zebx
Using wolfram calculator they both are at a distance of 1.03 bilion ly and the distance between the nuclei is about 23", corresponding to a distance of 114700 ly. While the distance between the "lowest point" of the right side of the central galaxy and the "upper point" of the bottom galaxy is about 8", so a distance of 40000 ly. I think they're merging so.
Posted