Arp 299 (parts of it also known as IC 694 and NGC 3690) is a pair of colliding galaxies approximately 134 million light-years away in the constellation Ursa Major. Both of the galaxies involved in the collision are barred irregular galaxies. NGC 3690 was discovered on 18 March 1790 by German-British astronomer William Herschel. [1]

2008年4月24日 · Arp 299 belongs to the family of ultra-luminous infrared galaxies and is located in the constellation of Ursa Major, the Great Bear, approximately 150 million light-years away.

Arp 299 belongs to the family of ultraluminous infrared galaxies and is located in the constellation of Ursa Major, the Great Bear, approximately 150 million light-years away. It is the 299th galaxy in Arp's Atlas of Peculiar Galaxies.

2016年11月1日 · The two galaxies of Arp 299 have been locked in a gravitational combat for millions of years, while their central black holes will soon do battle themselves. Featured, the high-resolution visible-light image was taken by Hubble, while the superposed diffuse glow of X-ray light was imaged by NuSTAR and shown in false-color red, green, and blue.

1991年11月29日 · Since 1990, four supernova explosions have been seen optically in Arp 299. Observations with the Very Large Array (VLA) showed a region near the nucleus of one of the colliding galaxies which had all the earmarks of prolific star formation.

Arp 296 is at the right of center in the image and consists of a quite distinct barred face-on spiral galaxy (PGC 35345) and a less distinct galaxy (PGC 2580146) exhibiting filamentary structure on either side. Arp 296 is much further away than Arp 299 …

Arp 299 is a system located about 140 million light years from Earth. It contains two galaxies that are merging, creating a partially blended mix of stars from each galaxy in the process. However, this stellar mix is not the only ingredient. New data from Chandra reveals 25 bright X-ray sources sprinkled throughout the Arp 299 concoction.

2017年6月26日 · Arp 299 is a system located about 140 million light years from Earth. It contains two galaxies that are merging, creating a partially blended mix of stars from each galaxy in the process. However, this stellar mix is not the only ingredient. New data from Chandra reveals 25 bright X-ray sources sprinkled throughout the Arp 299 concoction.

2003年6月22日 · Recent BeppoSAX observations of Arp 299, a powerful far-IR merging starburst system composed of IC 694 and NGC 3690, clearly unveiled for the first time in this system the presence of a strongly absorbed active galactic nucleus (AGN).

About 140 million light years from Earth, two galaxies are colliding in Arp 299. As they merge, shock waves rumble through each galaxy and trigger waves of new star formation. Some of these stars are very large and live brief and violent lives. Chandra finds over a dozen systems in Arp 299 that give off large amounts of X-rays called "ULXs".