Polar Ring Galaxy
A polar ring galaxy prg is a galaxy with a ring of gas dust and stars nearly at right angles to the disk of the galaxy. Ngc 4650a appears to be two galaxies in one.
Polar Ring Galaxy Wikipedia
May 10 1999 polar ring galaxy ngc 4650a credit.
Polar ring galaxy. Broader than the disk ngc 660s ring spans over 50000 light years. Because the polar ring extends far into the the halo of ngc 4650a it provides a unique opportunity to map dark matter which is thought to surround most disk galaxies. A polar ring galaxy is a type of galaxy in which an outer ring of gas and stars rotates over the poles of the galaxy.
By determining how fast a polar ring rotates at different distances from the center of the system. These polar rings are thought to form when two galaxies gravitationally interact with each other. The ngc 660 galaxy is an extremely rare galaxy referred to as a polar ring galaxy.
The ring in a polar ring galaxy rotates at a speed comparable to that of its host galaxy. These two galaxies collided billions of years ago and formed this extremely special shape. Gallagher et al.
Determining the typical ages of the stars in the polar ring is an initial goal of our polar ring science team that can provide a clue to the evolution of this unusual galaxy. Broader than the disk ngc 660s ring spans over 50000 light years. The hubble heritage team aura stsci nasa.
References this galaxy related article is a stub. A rare type of galaxy known as a polar ring ngc 4650a is composed of an old central group of stars and a young ring of stars rotating farther out. The polar ring component can also be used to explore the shape of the galaxys otherwise unseen dark matter halo by calculating the dark matters gravitational influence on the rotation of the ring and disk.
The polar ring component can also be used to explore the shape of the galaxys otherwise unseen dark matter halo by calculating the dark matters gravitational influence on the rotation of the ring and disk. These polar rings are thought to form when two galaxies gravitationally interact with each other. Some galaxies feature a polar ring within the disk of the galaxy ugc 5600.
Both components are clearly visible in this featured photograph by. Lists of astronomical objects. You can help wikipedia by expanding it.
One possibility is that a material is tidally stripped from a passing galaxy to produce the polar ring seen in the polar ring galaxy. Its hypothesized to have formed like this due to the gravitational interaction the galaxy could have had with another galaxy and caused it to be strung out over time. Polar rings occur in almost 5 of lenticular galaxies and in a few spiral galaxiesunderstanding their kinematics and evolution is important especially because it can help determine the three dimensional structure of dark matter halos.
A polar ring galaxy is a type of galaxy in which an outer ring of gas and stars rotates over the poles of the galaxy. This page was last edited on 16 march. One possibility is that a material is tidally stripped from a passing galaxy to prod.
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