In the new window, use these settings: Contour levels-10, Contour Smoothness-1, Low-0, High-550 and then click Generate, Apply and Close. Go to Analysis> Contours and then Analysis> Contour Parameters.
Matching up the x-ray and optical images: Center the Cartwheel Galaxy in the frame by moving the blue rectangle over it in the small image in the upper right corner (see below). With the new frame on the right chosen (it should be outlined in blue), choose Zoom> Zoom 4. What are the coordinates of the Cartwheel Galaxy?
#Saoimage ds9 scroll up and down archive#
From the menus, choose Analysis> Virtual Observatory> Chandra-Ed Archive Server.
#Saoimage ds9 scroll up and down install#
Install the software and load the FITS file (data/image file): To examine and compare the Cartwheel Galaxy in optical and X-ray bands and determine the sources of the ultra- and hyperluminous x-rays (U/HLXs). The in-fall of material from the accretion disc produces highly energetic X-rays, so these systems are also classified as U/HLXs. Material is pulled from the companion stars and forms accretion discs around the neutron stars and back holes due to their extreme gravitational fields. Some of the neutron stars and black holes are in contact binary systems with companion stars. Young supernovas and supernova remnants are ultra and hyperluminous X-ray sources (U/HLXs). When the most massive of these stars undergo catastrophic collapse as supernova events, neutron stars and black holes are formed. The ring structure contains several billion new stars that would not normally have been created in such a short time span.
The Cartwheel Galaxy provides an opportunity to study how extremely massive stars are formed in large fragmented gas clouds. The gravitational disruption of a smaller intruder galaxy passing through the Cartwheel Galaxy compressed the interstellar gas and dust – causing a wave of star formation to move out from the impact point like a ripple across the surface of a pond. The spiral structure is beginning to re-emerge, as seen in the faint arms or spokes between the outer ring and the bulls-eye shaped nucleus. The Cartwheel Galaxy was probably a normal spiral structure galaxy similar to the Milky Way Galaxy before the collision. The ring-shaped rim of the Cartwheel Galaxy is the result of a rare and spectacular The image combines data from four different observatories: the Chandra X-ray Observatory (purple) the Galaxy Evolution Explorer satellite (ultraviolet/blue), the Hubble Space Telescope (visible/green), and the Spitzer Space Telescope (infrared/red). The composite image to the left shows the unique structure of the Cartwheel Galaxy. The Cartwheel Galaxy is part of a group of galaxies ~five hundred million (500x106) light years away in the direction of the constellation Sculptor.
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