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Galaxy Cluster Leaving Trail Of Hot Gas In Its Wake After Eating Its Neighbor
Space.com
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today
The Chandra X-ray Observatory view of galaxy group NGC 4839 has revealed that it is "plunging into the Coma galaxy cluster and leaving behind an extraordinary tail of superheated gas," according to NASA.
Credit: NASA/CXC/A. Hobart
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00:00
Visit Chandra's Beautiful Universe
00:04
NGC 4839
00:08
A group of galaxies is plunging into
00:12
the Koma galaxy cluster and leaving behind an extraordinary
00:16
tale of superheated gas. Astronomers have confirmed
00:20
this is the longest known tale behind a galaxy group and used it
00:24
to gain a deeper understanding of how galaxy clusters, some of the
00:28
largest structures in the universe, grow to their enormous sizes.
00:32
Astronomers trained NASA's Chandra X-ray Observatory
00:36
on the galaxy group NGC 4839
00:40
Galaxy groups are collections of about 50 galaxies or
00:44
less that are bound together by gravity.
00:48
Galaxy clusters are even larger and can contain hundreds or thousands
00:52
of individual galaxies. Both galaxy clusters and
00:56
galaxy groups are enveloped by huge amounts of hot gas
01:00
that are best studied using X-rays.
01:02
These superheated
01:04
pools of gas, though extremely
01:06
thin and diffuse, represent
01:08
a significant portion of the mass
01:10
in galaxy groups or clusters
01:12
and are crucial for understanding these systems.
01:14
NGC 4839 is located
01:18
near the edge of the Koma galaxy cluster,
01:20
one of the largest known clusters in the universe, about
01:24
340 million light-years away.
01:26
As NGC 4839 moves toward the center of the
01:30
Koma cluster, the hot gas in the galaxy group is stripped away
01:34
by its collision with gas in the cluster.
01:36
This results in a tail forming behind the galaxy group.
01:40
This comet-like tail is 1.5 million light-years long,
01:44
or hundreds of thousands of times
01:46
the distance between the sun and the nearest star,
01:48
making it the longest tail ever seen trailing
01:52
behind a group of galaxies.
01:54
This gas is a key ingredient in making
01:56
future generations of stars and planets.
01:58
The current brightness of the tail gives astronomers a special chance
02:04
to study the tail's gas before it mixes in with the hot gas in the cluster
02:08
and becomes too faint to study.
02:10
The gas in the tail behind NGC 4839
02:14
will ultimately merge with the large amount
02:16
of hot gas already present in the Koma cluster.
02:28
If you see the hazard, you'll get to the top of the tail.
02:32
The traffic is more likely to catch up from all of the YSEC 4839
02:34
and in a similar way to the FG and the TRO,
02:36
is to see the air with the HG.
02:38
Thegewirr with the HG7 214 going into all in the common center
02:40
of the BIMC 4839,
02:42
as it is sort of the NGC 4849 and the TRO,
02:44
is the NGC 4840 of the TRO.
02:46
The NGC 4960 is on the NGC 4839.
02:48
The NGC 4839 is on the Koma cluster that is in one of the MSEC 4949
02:50
and the NGC 4839.
02:52
The NGC 4839 of the TRO,
02:54
is in the Koma cluster of the TRO.
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2:34
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