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оригинального документа
: http://zebu.uoregon.edu/cluster.html
Дата изменения: Mon Oct 7 06:14:13 1996
Дата индексирования: Mon Oct 1 20:05:08 2012
Кодировка:
Поисковые слова: reflection nebula
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Hercules Cluster of Galaxies
This is a 2048x2048 CCD image of the Hercules cluster. This
cluster has a recessional velocity of 11,000 km/s. It is noteworthy
in that it contains a number of spiral galaxies, many of which
are intereacting. This is a sure sign that the cluster still has
substructure and is not fully
virialized yet.
Coma
Cluster of Galaxies
This is a 2048x2048 CCD image of the Coma Cluster. This cluster has
a recessional velocity of about 7000 km/s and is the densest cluster
in our local region of the Universe. In contrast to the Hercules
cluster, Coma has almost no spiral galaxies in its central regions.
The cluster is strongly virialized and has a hot intracluster medium
which generates strong X-ray emission. This image shows the central
few 100 kpc of the Coma cluster. At a slightly larger radius , images reveal that Coma is still rather devoid
of spiral galaxies. It is generally believed that the cold hydrogen
gas in the disks of spiral galaxies is swept out of them as they
orbit through the intracluster medium of Coma.
HST picture of intermediate redshift
cluster
Distant HST Cluster
___________________________________________________________________
The Electronic Universe Project
e-mail: nuts@moo.uoregon.edu