You are viewing a single comment's thread from:
RE: Dragonfly 44, a galaxy of the dark side made of dark matter
Deimos and Gemini-North data (see also a long exposure of the Dragonfly 44 galaxy in the above picture) have allowed for the extraction of the velocity of the stars lying inside the Dragonfly 44 galaxy. From there, one can infer the mass and to mass-to-light ratio of Dragonfly 44, since faster the stars move inside the galaxy, heavier is the galaxy.
What equation do you use to infer the mass?
Very cool article, btw. Going to read the paper in detail.
Newtonian mechanics is helping, applied to the visible masses, and what is missing to restore agreement with the observation.
PS: this is not really my field but this is how I understood it (and this makes sense to me)