NGC 4699 is an intermediate spiral 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 ...

Virgo. It is located at a distance of about 65 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 from Earth, which, given its apparent dimensions, means that NGC 4699 is about 85,000 light years across. It was discovered by William Herschel in 1786. It is a member of the NGC 4699 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.

Characteristics

NGC 4699 is a Seyfert like galaxy with very weak nuclear emission. The galaxy features a

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 ...

that is 0.41 arcminutes long and a ring with diameter 1.95 arcminutes. The galaxy features a large bulge which accounts for the 11.3% of the stellar mass of the galaxy and a large disky pseudobulge, which is larger than the strong bar. The disk within the bulge features tightly wrapped spiral arms. There are a lot of HII regions in the disk. The galaxy has an extended type-III outer

disk Disk or disc may refer to: * Disk (mathematics), a geometric shape * Disk storage Music * Disc (band), an American experimental music band * ''Disk'' (album), a 1995 EP by Moby Other uses * Disk (functional analysis), a subset of a vector sp ...

, with low central surface magnitude and which is thicker than the inner disk.

Supernovae

Three

supernova A supernova is a powerful and luminous explosion of a star. It has the plural form supernovae or supernovas, and is abbreviated SN or SNe. This transient astronomical event occurs during the last evolutionary stages of a massive star or when ...

e have been observed in NGC 4699: SN 1948A (type unknown, mag. 17), SN 1983K ( type II-P, mag. 17), and SN 2024muv ( type Ia, mag. 14.5). SN 1983K had a plateau-shaped light curve, and its spectra featured a progressive violet shift, which was explained by the presence of a preexisting outer shell of materials around the progenitor of the supernova.

Nearby galaxies

NGC 4699 belongs in the NGC 4697 group according to Makarov and Karachentsev. Other members of the group include

NGC 4697 NGC 4697 (also known as Caldwell 52) is an elliptical galaxy some 40 to 50 million light-years away in the constellation Virgo (constellation), Virgo. It is a member of the NGC 4697 Group, a group of galaxies also containing NGC 4731 and several ...

, NGC 4674, NGC 4700,

NGC 4731 NGC 4731 is a barred spiral galaxy located near the Virgo supercluster. To its celestial south lies NGC 4731A, a small irregular galaxy. Both galaxies feature high concentrations of neutral HI gas. It is theorized that its elongated arm structur ...

NGC 4742 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 ...

, NGC 4775, NGC 4781, NGC 4784, NGC 4790, NGC 4813, NGC 4948 and NGC 4958. It belongs to the Virgo II groups, an extension of the Virgo Cluster.

Gallery

File:NGC4699 - SDSS DR14 (panorama).jpg, NGC 4699 by the

Sloan Digital Sky Survey The Sloan Digital Sky Survey or SDSS is a major multi-spectral imaging and spectroscopic redshift survey using a dedicated 2.5-m wide-angle optical telescope at Apache Point Observatory in New Mexico, United States. The project began in 2000 a ...

References

External links

{{DEFAULTSORT:NGC 4699 Intermediate spiral galaxies Virgo (constellation) 4699 UGCA objects 43321