Astronomers Observe Two Spiral Galaxies in Collision Process

Astronomy Science ~ As galaxies congregate, there is the possibility of a spectacular light show will be visible, as is the case with NGC 2...

Astronomy Science ~ As galaxies congregate, there is the possibility of a spectacular light show will be visible, as is the case with NGC 2207 and IC 2163.

Located about 130 million light years from Earth in the Canis Major constellation, the couple is caught in a spiral galaxy collision scenarios. NGC 2207 and IC 2163 is the home of three supernova explosions in the last 15 years and has produced a collection of x-ray brightes light explosiont ever known. Special objects (known as the "ultraluminous X-ray sources" or ULXs) - have been found in this galaxy using data from NASA's Chandra Observatory X-ray.

As in our Milky Way galaxy, NGC 2207 and IC 2163 are sprinkled with many star system known as X-ray binary systems consisting of a star that is orbiting very close around a neutron star or black hole mass stars. The strong gravity of a neutron star or black holes attract matter from a companion star. Currently, this matter falls towards the neutron star or black hole, the material was heated to millions of degrees and generating X-rays.

Composite image showing the collision between the galaxies NGC 2207 and IC 2163 with Chandra data in pink, the data optical light from the Hubble telescope is red, green, and blue (appears in blue, white, orange, and brown), and infrared data from Spitzer is red.
Composite image showing the collision between the galaxies NGC 2207 and IC 2163 with Chandra data in pink, the data optical light from the Hubble telescope is red, green, and blue (appears in blue, white, orange, and brown), and infrared data from Spitzer is red.
X-rays are owned by ULXs much brighter than the 'normal' X-ray binary systems. The true nature of ULXs still debated, but they are likely to strange type of X-ray binary systems. The black hole in some ULXs may be heavier than the mass of the star and a black hole could represent categories of intermediate-mass black holes. But the black hole is still a hypothesis and has not confirmed its existence.

Composite image below shows NGC 2207 and IC 2163 contains data Chandra in pink, the data optical light from data of the Hubble Space Telescope in red, green, and blue (appears as a blue, white, orange, and brown), and the infrared Spitzer Space red telescope.

Scientists are now counted about 28 ULXs in NGC 2207 and IC 2163. Twelve of these objects vary over a span of several years, including seven previously undetected because they are in the phase of "calm" in previous observations.

The scientists involved in studying this system, notes that there is a strong relationship between the number of X-ray sources in the various regions of galaxies and the rate at which stars are formed in this region. This composite image shows the relationship through the sources of X-rays which are concentrated in the spiral arms of the galaxy, where a large number of stars that are known to form. This relationship also suggests that the companion star in a binary system is young and massive.

Shock wave - (like a sonic boom in supersonic aircraft) - formed during the collision, causing the collapse of gas clouds and star clusters formed. In fact, the researchers estimate that the stars associated with ULXs still very young and probably only about 10 million years old.

Moreover, this analysis suggests that stars of various masses form in the pair galaxy is at a level equivalent to form a 24-mass stars like the sun per year. For comparison, a galaxy like our Milky Way is estimated to spawn new stars at a rate of 1-3 new sun every year.
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Astronomy Science: Astronomers Observe Two Spiral Galaxies in Collision Process
Astronomers Observe Two Spiral Galaxies in Collision Process
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