AMDave
07-14-2012, 12:55 AM
Plot Progression!
Some pretty plots:http://milkyway.cs.rpi.edu/download/plots/XZ_plot.png http://milkyway.cs.rpi.edu/download/plots/XY_plot.png These are plots that I recently finished cleaning up that show the positions of the centers of the Sagittarius stream (the bases of the arrows) and the directions of the stream (arrows). The numbers represent the Sloan Digital Sky Survey stripe number of that stream detection. The top plot is looking at the Milky Way edge-on - the dotted line is roughly the size and position of the Galactic disk. The bottom plot is looking at the Milky Way face-on - the dotted line roughly represents the edge of the Galactic disk.Black arrows are below the disk of the galaxy, and white arrows are above the disk. Distances are in kiloparsecs (kpc), or thousands of parsecs; a parsec is about 3.26 light-years. "Sgr Core" is th elocation of the Sagittarius Dwarf Galaxy.As you can see, the results indicate a continuous stream that wraps all the way around the galaxy. (There are no arrows where we don't have data) Also, you can see that this stream is HUGE - its average orbital radius is as large or even larger than the radius of the Milky Way galaxy itself!See this thread (http://milkyway.cs.rpi.edu/milkyway/forum_thread.php?id=2923) for the previous plot, which looks at the Sagittarius stream from the point of view of an observer on the Earth (which is the only point of view that we have data from, of course!)
More... (http://milkyway.cs.rpi.edu/milkyway/forum_thread.php?id=2960)
Some pretty plots:http://milkyway.cs.rpi.edu/download/plots/XZ_plot.png http://milkyway.cs.rpi.edu/download/plots/XY_plot.png These are plots that I recently finished cleaning up that show the positions of the centers of the Sagittarius stream (the bases of the arrows) and the directions of the stream (arrows). The numbers represent the Sloan Digital Sky Survey stripe number of that stream detection. The top plot is looking at the Milky Way edge-on - the dotted line is roughly the size and position of the Galactic disk. The bottom plot is looking at the Milky Way face-on - the dotted line roughly represents the edge of the Galactic disk.Black arrows are below the disk of the galaxy, and white arrows are above the disk. Distances are in kiloparsecs (kpc), or thousands of parsecs; a parsec is about 3.26 light-years. "Sgr Core" is th elocation of the Sagittarius Dwarf Galaxy.As you can see, the results indicate a continuous stream that wraps all the way around the galaxy. (There are no arrows where we don't have data) Also, you can see that this stream is HUGE - its average orbital radius is as large or even larger than the radius of the Milky Way galaxy itself!See this thread (http://milkyway.cs.rpi.edu/milkyway/forum_thread.php?id=2923) for the previous plot, which looks at the Sagittarius stream from the point of view of an observer on the Earth (which is the only point of view that we have data from, of course!)
More... (http://milkyway.cs.rpi.edu/milkyway/forum_thread.php?id=2960)