NGC 7007 is a
lenticular galaxy with a small
bar
Bar or BAR may refer to:
Food and drink
* Bar (establishment), selling alcoholic beverages
* Candy bar
* Chocolate bar
Science and technology
* Bar (river morphology), a deposit of sediment
* Bar (tropical cyclone), a layer of cloud
* Bar (u ...
, around 100 million
light-year
A light-year, alternatively spelled light year, is a large unit of length used to express astronomical distances and is equivalent to about 9.46 trillion kilometers (), or 5.88 trillion miles ().One trillion here is taken to be 1012 ...
s away from
Earth 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 ...
Indus
The Indus ( ) is a transboundary river of Asia and a trans-Himalayan river of South and Central Asia. The river rises in mountain springs northeast of Mount Kailash in Western Tibet, flows northwest through the disputed region of Kashmir, ...
.
It was discovered by astronomer
John Herschel
Sir John Frederick William Herschel, 1st Baronet (; 7 March 1792 – 11 May 1871) was an English polymath active as a mathematician, astronomer, chemist, inventor, experimental photographer who invented the blueprint and did botanical wor ...
on July 8, 1834.
The galaxy is a
type 2 seyfert galaxy, and is host to a
supermassive black hole with an estimated mass of 4.9 × 10
7 M☉.
Like all lenticular galaxies, NGC 7007 has a classical disk similar to most galaxies of its type, having a nearly spherical bulge. Unlike most galaxies of its type, the pattern of dust in NGC 7007 is not circular and continuous surrounding the bulge but shows breaks in its structure. These dust lanes also appear to form dusty spiral arms similar to the Sa galaxies
NGC 2855,
NGC 4984, and
NGC 7377.
NGC 7007 is an
isolated galaxy, with it a part of the
Telescopium−Grus Cloud, a
galaxy filament.
Counter-rotating disk
In NGC 7007, there is counter-rotating disk of
ionized gas that counter-rotates with respect to the stars. This indicates an external origin of the gas such as
accretion
Accretion may refer to:
Science
* Accretion (astrophysics), the formation of planets and other bodies by collection of material through gravity
* Accretion (meteorology), the process by which water vapor in clouds forms water droplets around nucl ...
.
See also
*
NGC 7079
*
List of NGC objects (7001–7840)
This is a list of NGC objects 7001–7840 from the New General Catalogue (NGC). The astronomical catalogue is composed mainly of star clusters, nebulae, and galaxies. Other objects in the catalogue can be found in the other subpages of the list of ...
References
External links
{{Indus (constellation)
Astronomical objects discovered in 1834
Barred lenticular galaxies
Seyfert galaxies
Indus (constellation)
7007
66069
Field galaxies
Telescopium−Grus Cloud