3 ms·
Isn't there a lot of uncertainty about the mass of the milky way? I think if you are going to use something as a unit you really need an accurate figure.
by sebzim4500 3y ago
Isn't there a lot of uncertainty about the mass of the milky way? I think if you are going to use something as a unit you really need an accurate figure.
- jwuphysics 3y agoThere is indeed lots of uncertainty, and all Milky Way mass estimates are model dependent. Also, the ~10^12 solar mass figure referred to above is an estimate of the total galaxy + dark matter halo mass. Stellar or baryonic mass estimates are closer to ~6 x 10^10 solar masses. I'm using "~" to mean uncertainty to within a factor of 2 or so.
- auxbuss 3y agoStacy McGough wrote about this topic recently wrt the third Gaia data release: https://tritonstation.com/2023/09/19/recent-developments-concerning-the-gravitational-potential-of-the-milky-way-i/ https://tritonstation.com/2023/09/19/recent-developments-con...