Explore how big the Milky Way is and compare it to the sun. Learn the formula for calculating the mass of the Milky Way. Study the components of...
A. explain why the same object has a different weight on different stars B. compare the distance between the Milky Way and Andromeda C. show that studying dark matter could help to answer some scientific questions D. support the idea that scientists prefer to talk about mass instead of weight...
We set new limits on the mass of the Milky Way, making use of the latest kinematic information for Galactic satellites and halo objects. Our sample consists of 11 satellite galaxies, 137 globular clusters, and 413 field horizontal-branch (FHB) stars up to distances of 10 kpc from the Sun....
C. Beers, The mass of the Milky Way: Limits from a newly assembled set of halo objects, A&A 397 (Jan., 2003) 899-911, [astro-ph/0210508].Sakamoto, T., Chiba, M., Beers, T.C.: The mass of the Milky Way: limits from a newly assembled set of halo objects. Astron. Astrophys...
Some of these models suggest that as much as 85% of the Galactic mass may be in the form of dark matter, and that about 50% of the total mass may lie in an outer dark-halo fall-off region. 展开 关键词: galaxy fundamental parameters - galaxy kinematics and dynamics ...
Milky Way n. 1.The galaxy containing the sun, solar system, and all of the individually visible stars in the night sky, along with various nebulae, star clusters, and dust clouds, thought to have a super-massive black hole at its center of mass. ...
We present and apply a method to infer the mass of the Milky Way (MW) by comparing the dynamics of MW satellites to those of model satellites in the eagle cosmological hydrodynamics simulations. A distribution function (DF) for galactic satellites is constructed from eagle using specific angular...
From this, they found that the total halo mass of the Milky Way was about 1.04 x 1012 (over 1 trillion) solar masses, with a 20 percent margin of error. This estimate places much tighter constraints on the Milky Way's mass than previous estimates, and could have some significant implicati...
A parametrized model of the mass distribution within the Milky Way is fitted to the available observational constraints. The most important single parameter is the ratio of the scalelength R d * of the stellar disc to R 0 . The disc and bulge dominate v c ( R ) at R R 0 only for ...
This truncated, flat rotation curve (TF) model possesses a rich family of simple distribution functions which vary in velocity anisotropy. The model is used to estimate the total mass of the Milky Way halo using the latest data on the motions of satellite galaxies and globular clusters at ...