B What is the mass distribution and rotation curve of galaxy IC1101?

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IC1101, the largest known galaxy, exhibits a significantly high mass-to-light ratio, with values reaching 12:1 at 20 kpc, 100:1 at 200 kpc, and over 1000:1 at 1000 kpc. The discussion raises questions about the galaxy's rotation curve, particularly its velocity dispersion, given its elliptical shape and minimal rotation. Comparisons are made to the Andromeda galaxy to hypothesize how the rotation curve might behave at varying distances. Additionally, the conversation touches on the potential size and distribution of dark matter necessary to support such mass-to-light ratios. Overall, there is a call for more detailed research and information on IC1101's mass distribution and dark matter characteristics.
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what does the dark matter distribution look like in galaxy IC1101
I've been reading up a little on IC1101, the largest known galaxy and there is not a lot of info on it, but it seems to have an unusually large mass to light ratio according to this popular article (see half way down):



According to this article at 20kpc it's got 12:1 mass to light, at 200kpc it's 100:1 and at 1000kpc it's got more than 1000:1. What I'm wondering is what would the rotation curve (or in this case velocity dispersion as it's an eliptical with very little rotation) look like approximately? Similar to let's say Andromeda or a more rapidly rising velocity as we move outward? And what might the dark matter size and distribution look like to come up with numbers like these? I couldn't find any real information in this area doing a search. Thanks.
 
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Hi @masher:

The date 2029 seems to be an error. The link fails to work.

Regards,
Buzz
 
Buzz Bloom said:
The date 2029 seems to be an error. The link fails to work.
Link works for me (running Firefox on an old Vista PC):

1642096738730.png
 
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berkeman said:
Link works for me (running Firefox on an old Vista PC):
Works for me too with Firefox and an old MacBookPro

The eighth paper on the list that I find is https://arxiv.org/abs/1612.06428
 
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