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Full-Text Articles in Astrophysics and Astronomy
Brightening Of The Bridge: Reflections Of A Past Sgr A* Outburst In Galactic Center Molecular Clouds, Nathalie Kanoelani Takiko Jones
Brightening Of The Bridge: Reflections Of A Past Sgr A* Outburst In Galactic Center Molecular Clouds, Nathalie Kanoelani Takiko Jones
Senior Projects Spring 2021
The center of our Milky Way galaxy is located more than 200,000 trillion km from Earth in the constellation Sagittarius. At the very center of our galaxy is a super-massive black hole called Sagittarius A$^{*}$. The black hole is surrounded by many interesting objects, including molecular clouds. Molecular clouds are large, cold clouds of gas in which stars are formed. Telescopes like NuSTAR have observed X-rays (radiation 10,000 times higher in energy than visible light) coming from these molecular clouds. Since cold gas cannot create such high energy emission by itself, there must be some external source of radiation interacting …
Axial Symmetry Tests Of Milky Way Disk Stars Probe The Galaxy's Matter Distribution, Austin Hinkel
Axial Symmetry Tests Of Milky Way Disk Stars Probe The Galaxy's Matter Distribution, Austin Hinkel
Theses and Dissertations--Physics and Astronomy
In Galactic dynamics, various assumptions have been employed for mathematical ease. These assumptions are approximately valid, but departures reveal perturbations on our Galaxy. In this dissertation, we select a complete, Gaia DR2 data set, and using this data, we find evidence for axial symmetry breaking in the Galaxy, away from the spiral arms and the Galactic bar. This asymmetry is compatible with a prolate dark matter halo tilted with respect to the disk, with a long axis pointing in the direction of the Magellanic Clouds, and this matches an inventory of nearby torques. These asymmetries vary North and South of …