Ursa Major B or 3C 244.1 is a
radio galaxy located in the
constellation
A constellation is an area on the celestial sphere in which a group of visible stars forms Asterism (astronomy), a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object.
The origins of the e ...
Ursa Major.
It is classified as a Fanaroff-Riley Type II (FRII) radio source, which means that the luminosity increases with distance from the core. There are two, asymmetrical radio-emitting lobes straddling the parent galaxy. These lobes have an angular separation of 52″ at a
position angle of 168°. When measured in the optical band, this galaxy has a redshift value of ''z'' = 0.428, corresponding to a distance of 1.5
Gpc. 3C 244.1 is located within a cluster of other galaxies.
Observations with the
Hubble Space Telescope show an
elliptical galaxy with blobs and a filamentary structure. The radio jets being generated by the
active galactic nucleus are interacting with the
interstellar medium
In astronomy, the interstellar medium is the matter and radiation that exist in the space between the star systems in a galaxy. This matter includes gas in ionic, atomic, and molecular form, as well as dust and cosmic rays. It fills interstella ...
, producing extended narrow line regions. These features are commonly associated with many active galaxies.
The axial ratio of the elliptical galaxy is 1.4, meaning it is about 1.4 times large along the primary axis than along the perpendicular axis.
At the nucleus of this galaxy is a
supermassive black hole with an estimated
solar mass
The solar mass () is a standard unit of mass in astronomy, equal to approximately . It is often used to indicate the masses of other stars, as well as stellar clusters, nebulae, galaxies and black holes. It is approximately equal to the mass ...
es. The dimensionless ratio of the black hole spin to the black hole mass-energy ''j'' is .
See also
*
Lists of galaxies
This is a list of lists of galaxies.
Lists of galaxies
* List of galaxies, general list of galaxies
; Galaxies by type
* List of spiral galaxies
* List of ring galaxies
* List of polar-ring galaxies
* List of quasars
; Galaxies by association
* ...
References
External links
www.jb.man.ac.uk/atlas/*
{{Portal bar, Astronomy, Stars, Spaceflight, Outer space, Solar System
Radio galaxies
Ursa Major (constellation)
244.1
+58.21
2821461