In the nearby universe, nearly one-third of disk galaxies are not perfect disks but exhibit a warped shape resembling a potato chip. Astronomers refer to this phenomenon as a disk warp. The Milky Way, as a typical disk galaxy, also has this warp feature. By "seeing" how the disk warp ...
The article focuses on Evan Levine and his colleagues at the University of California, Berkeley, who created the map of the outer part of the Milky Way's spiral arms. They used radio telescope measurements of the amount of at...
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The Milky Way’s stellar halo is the visible portion of what is more broadly called the galactic halo. This galactic halo is dominated by invisible dark matter, whose presence is only measurable through the gravity that it exerts. Every galaxy has its own halo of dark matter. These ha...
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We search for evidence of dark matter in the Milky Way by utilizing the stellar number density distribution and kinematics measured by the Sloan Digital Sky Survey (SDSS) to heliocentric distances exceeding ~10 kpc. We employ the cylindrically symmetric form of Jeans equations and focus on the ...
New measurements suggest that the traditional view of the Milky Way as a galaxy with four major spiral arms could be wrong.
The distribution of shapes of galaxies' dark halos provides a basic test for models of galaxy formation. To-date, few dark halo shapes have been measured, and the results of different methods appear contradictory. Here, we add to the sample of measured s
shape,form- the spatial arrangement of something as distinct from its substance; "geometry is the mathematical science of shape" crookedness,torsion,tortuosity,tortuousness,contortion- a tortuous and twisted shape or position; "they built a tree house in the tortuosities of its boughs"; "the acr...
制转张南定九知难观然空局再许据拉历于者元制转张南定九知难观然空局再许据拉历于者元The shape of the Milky Way Galaxy is like a _