NGC 5084 is a
lenticular galaxy in the constellation of
Virgo. It is located at a distance of about 80 million light years from Earth, which, given its apparent dimensions, means that NGC 5084 is at least 200,000 light years across. It is one of the largest and most massive galaxies in the
Virgo Supercluster.
William Herschel discovered it on March 10, 1785. It is a member of the
NGC 5084 Group of galaxies, which is a member of the
Virgo II Groups
The Virgo II Groups, also known as the Virgo II Cloud, Virgo Southern Extension, or the Virgo S Cloud, are a series of at least 100 galactic clusters and individual galaxies stretching approximately off the southern edge of the Virgo Supercluster ...
, a series of galaxies and
galaxy clusters strung out from the southern edge of the
Virgo Supercluster.
The galaxy is seen nearly edge-on, with
inclination 86°, and features a warped disk and large quantities of
HI gas extending along the disk, probably accumulated after
multiple accretions of smaller galaxies.
Mass and size estimates
NGC 5084 is a very massive system, with a high
rotational speed of about 328 km/s.
It is categorised as a supermassive disk galaxy. Gottesen (1986) estimated based on the rotational speed that the mass of NGC 5084 is 8.5 x10
11 and its radius to be 34 kpc (110 kly) for an estimated distance of 15.5 Mpc (50 Mly).
Gottesman et al. (2002) using the same method adopted as distance the 30 Mpc and calculated the mass of NGC 5084 to be 1.7 x 10
12 . Koribalski et al. (2004) measured the rotational speed of NGC 5084 to be 334 km/s and calculated its mass to be 1.3 × 10
12 and its radius was estimated at 50 kpc (163 Kly). Carrignan et al. (1997) measured the velocity differences and projected separations of nine galaxies they identified as satellites of NGC 5084 and using different equations they estimated the mass of NGC 5084 to be between 6 x 10
12 and 1 x 10
13 , which was at that time the highest mass ever derived for a disk galaxy. They estimated the optical diameter of NGC 5084 to be 74 kpc (241 Kly).
Nearby galaxies
NGC 5084 is the largest galaxy in the NGC 5084 group, which also includes
NGC 5087 and
NGC 5134
NGC commonly refers to:
* New General Catalogue of Nebulae and Clusters of Stars, a catalogue of deep sky objects in astronomy
NGC may also refer to:
Companies
* NGC Corporation, name of US electric company Dynegy, Inc. from 1995 to 1998
* Nat ...
and some smaller galaxies. The galaxy group is compact, showing little redshift dispersion.
NGC 5068
NGC 5068 is a face-on field barred spiral galaxy in the Virgo constellation. NGC 5068 is located approximately 22 million light-years away and has a diameter that exceeds 45000 light-years.
Although no supernovae have been observed in NGC 5068 ...
is a foreground galaxy. Other nearby galaxy groups include the NGC 5078 group, which includes
NGC 5078,
NGC 5061, and
NGC 5101, and
NGC 4965 group. NGC 5084 is located at end of Virgo II groups, a filament of galaxy groups that extents southwards from the
Virgo cluster.
See also
*
NGC 1961 - a supermassive spiral galaxy
*
UGC 12591 - a supermassive lenticular/spiral galaxy
Gallery
NGC5084 - SDSS DR14.jpg, NGC 5084 (SDSS DR14)
Ngc5084-hst-R702GB658.jpg, NGC 5084 by Hubble Space Telescope
PanSTARRS NGC 5084.jpg, Pan-STARRS image of NGC 5084
2MASS NGC 5084 JHK.jpg, NGC 5084 by 2MASS
The Two Micron All-Sky Survey, or 2MASS, was an astronomical survey of the whole sky in infrared light. It took place between 1997 and 2001, in two different locations: at the U.S. Fred Lawrence Whipple Observatory on Mount Hopkins, Arizona, and ...
References
External links
{{DEFAULTSORT:NGC 5084
Lenticular galaxies
Virgo Supercluster
Virgo (constellation)
Discoveries by William Herschel
5084
46525