More on that galaxy without dark matter. The other stuff I've put in another collection (various posts here https://plus.google.com/u/0/collection/ociYX) but this one is really too short to give it such a grandiose label as "my astronomy articles".
Basically this is really simple. If this galaxy is at 20 Mpc, then it's really weird and doesn't have any dark matter (or at least way less than any other known galaxy that's not embedded in a tidal feature). That's the distance favoured by the original discovers. If it's at a 10 Mpc as others have claimed, then it's not weird at all and has loads of dark matter.
This new study is an independent study by another group and they favour the 20 Mpc distance. That's all it says. As the description in arXiv states : " text is a bit laconic because of the 1000 word RNAAS limit."
Methinks we'll need several more independent analyses before we get to the bottom of this one.
https://arxiv.org/abs/1808.02176
No comments:
Post a Comment
Due to a small but consistent influx of spam, comments will now be checked before publishing. Only egregious spam/illegal/racist crap will be disapproved, everything else will be published.