NGC 3166 Group in the context of Ursa Major Cluster

NGC 3166 Group in the context of Ursa Major Cluster

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⭐ Core Definition: NGC 3166 Group

The Leo II Groups, Leo II Cloud, or simply the Leo Cloud is a galaxy filament consisting of at least 18 galaxy groups. It is located approximately 86 Mly (26 Mpc) from the Solar System. The Leo Cloud in supergalactic SGY coordinates is physically behind the Virgo Cluster. Eventually, over the next Hubble time, the galaxy groups that make up the Leo II Cloud will infall and merge with the Virgo Cluster.

The Leo Cloud, along with the Crater Cloud which contains the NGC 4038 Group, is actually the same branch of a larger galaxy filament that extends from the Centaurus Cluster through the Virgo Cluster and continues through the Ursa Major Cluster, known as the Virgo Strand. The Virgo Strand is the main component of the Virgo Supercluster and is made of two branches with the lower branch consisting of the Leo and Crater clouds, while the upper branch is known as the Virgo Southern Extension or Virgo II Groups.

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NGC 3166 Group in the context of NGC 3169

NGC 3169 is a spiral galaxy about 75 million light years away in the constellation Sextans. It has the morphological classification SA(s)a pec, which indicates this is a pure, unbarred spiral galaxy with tightly-wound arms and peculiar features. There is an asymmetrical spiral arm and an extended halo around the galaxy. It is a member of the NGC 3166 Group of galaxies, which is a member of the Leo II Groups, a series of galaxies and galaxy clusters strung out from the right edge of the Virgo Supercluster.

This is a LINER 2 galaxy that displays an extended emission of X-rays in the region of the nucleus. A hard X-ray source at the center most likely indicates an active galactic nucleus. The stellar population in the nucleus, and a ring at an angular radius of 6″, shows an age of only one billion years and is generally younger than the surrounding stellar population. This suggests that a burst of star formation took place in the nucleus roughly one billion years ago.

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LINKED FROM (PARENTS)
← NGC 3169
LINKS TO (CHILDREN)
Galaxy filament → Galaxy group → Solar System → Supergalactic coordinate system → Virgo Cluster → Hubble time → NGC 4038 Group → Centaurus Cluster → Ursa Major Cluster → Virgo Strand → Virgo Supercluster → Virgo Southern Extension → Virgo II Groups →